diff options
Diffstat (limited to 'ruby_1_8_6/eval.c')
| -rw-r--r-- | ruby_1_8_6/eval.c | 13279 |
1 files changed, 0 insertions, 13279 deletions
diff --git a/ruby_1_8_6/eval.c b/ruby_1_8_6/eval.c deleted file mode 100644 index d384a69f98..0000000000 --- a/ruby_1_8_6/eval.c +++ /dev/null @@ -1,13279 +0,0 @@ -/********************************************************************** - - eval.c - - - $Author$ - $Date$ - created at: Thu Jun 10 14:22:17 JST 1993 - - Copyright (C) 1993-2003 Yukihiro Matsumoto - Copyright (C) 2000 Network Applied Communication Laboratory, Inc. - Copyright (C) 2000 Information-technology Promotion Agency, Japan - -**********************************************************************/ - -#include "ruby.h" -#include "node.h" -#include "env.h" -#include "util.h" -#include "rubysig.h" - -#ifdef HAVE_STDLIB_H -#include <stdlib.h> -#endif -#ifndef EXIT_SUCCESS -#define EXIT_SUCCESS 0 -#endif -#ifndef EXIT_FAILURE -#define EXIT_FAILURE 1 -#endif - -#include <stdio.h> - -#include "st.h" -#include "dln.h" - -#ifdef __APPLE__ -#include <crt_externs.h> -#endif - -/* Make alloca work the best possible way. */ -#ifdef __GNUC__ -# ifndef atarist -# ifndef alloca -# define alloca __builtin_alloca -# endif -# endif /* atarist */ -#else -# ifdef HAVE_ALLOCA_H -# include <alloca.h> -# else -# ifndef _AIX -# ifndef alloca /* predefined by HP cc +Olibcalls */ -void *alloca (); -# endif -# endif /* AIX */ -# endif /* HAVE_ALLOCA_H */ -#endif /* __GNUC__ */ - -#ifdef HAVE_STDARG_PROTOTYPES -#include <stdarg.h> -#define va_init_list(a,b) va_start(a,b) -#else -#include <varargs.h> -#define va_init_list(a,b) va_start(a) -#endif - -#ifndef HAVE_STRING_H -char *strrchr _((const char*,const char)); -#endif - -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#ifdef __BEOS__ -#include <net/socket.h> -#endif - -#ifdef __MACOS__ -#include "macruby_private.h" -#endif - -#ifdef __VMS -#include "vmsruby_private.h" -#endif - -#ifdef USE_CONTEXT - -NORETURN(static void rb_jump_context(rb_jmpbuf_t, int)); -static inline void -rb_jump_context(env, val) - rb_jmpbuf_t env; - int val; -{ - env->status = val; - setcontext(&env->context); - abort(); /* ensure noreturn */ -} -/* - * PRE_GETCONTEXT and POST_GETCONTEXT is a magic for getcontext, gcc, - * IA64 register stack and SPARC register window combination problem. - * - * Assume following code sequence. - * - * 1. set a register in the register stack/window such as r32/l0. - * 2. call getcontext. - * 3. use the register. - * 4. update the register for other use. - * 5. call setcontext indirectly (or directly). - * - * This code should be run as 1->2->3->4->5->3->4. - * But after second getcontext return (second 3), - * the register is broken (updated). - * It's because getcontext/setcontext doesn't preserve the content of the - * register stack/window. - * - * setjmp also doesn't preserve the content of the register stack/window. - * But it has not the problem because gcc knows setjmp may return twice. - * gcc detects setjmp and generates setjmp safe code. - * - * So setjmp calls before and after the getcontext call makes the code - * somewhat safe. - * It fix the problem on IA64. - * It is not required that setjmp is called at run time, since the problem is - * register usage. - * - * Since the magic setjmp is not enough for SPARC, - * inline asm is used to prohibit registers in register windows. - * - * Since the problem is fixed at gcc 4.0.3, the magic is applied only for - * prior versions of gcc. - * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21957 - * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22127 - */ -# define GCC_VERSION_BEFORE(major, minor, patchlevel) \ - (defined(__GNUC__) && !defined(__INTEL_COMPILER) && \ - ((__GNUC__ < (major)) || \ - (__GNUC__ == (major) && __GNUC_MINOR__ < (minor)) || \ - (__GNUC__ == (major) && __GNUC_MINOR__ == (minor) && __GNUC_PATCHLEVEL__ < (patchlevel)))) -# if GCC_VERSION_BEFORE(4,0,3) && (defined(sparc) || defined(__sparc__)) -# ifdef __pic__ -/* - * %l7 is excluded for PIC because it is PIC register. - * http://lists.freebsd.org/pipermail/freebsd-sparc64/2006-January/003739.html - */ -# define PRE_GETCONTEXT \ - ({ __asm__ volatile ("" : : : \ - "%o0", "%o1", "%o2", "%o3", "%o4", "%o5", "%o7", \ - "%l0", "%l1", "%l2", "%l3", "%l4", "%l5", "%l6", \ - "%i0", "%i1", "%i2", "%i3", "%i4", "%i5", "%i7"); }) -# else -# define PRE_GETCONTEXT \ - ({ __asm__ volatile ("" : : : \ - "%o0", "%o1", "%o2", "%o3", "%o4", "%o5", "%o7", \ - "%l0", "%l1", "%l2", "%l3", "%l4", "%l5", "%l6", "%l7", \ - "%i0", "%i1", "%i2", "%i3", "%i4", "%i5", "%i7"); }) -# endif -# define POST_GETCONTEXT PRE_GETCONTEXT -# elif GCC_VERSION_BEFORE(4,0,3) && defined(__ia64) -static jmp_buf function_call_may_return_twice_jmp_buf; -int function_call_may_return_twice_false_1 = 0; -int function_call_may_return_twice_false_2 = 0; -# define PRE_GETCONTEXT \ - (function_call_may_return_twice_false_1 ? \ - setjmp(function_call_may_return_twice_jmp_buf) : \ - 0) -# define POST_GETCONTEXT \ - (function_call_may_return_twice_false_2 ? \ - setjmp(function_call_may_return_twice_jmp_buf) : \ - 0) -# elif defined(__FreeBSD__) && __FreeBSD__ < 7 -/* - * workaround for FreeBSD/i386 getcontext/setcontext bug. - * clear the carry flag by (0 ? ... : ...). - * FreeBSD PR 92110 http://www.freebsd.org/cgi/query-pr.cgi?pr=92110 - * [ruby-dev:28263] - */ -static int volatile freebsd_clear_carry_flag = 0; -# define PRE_GETCONTEXT \ - (freebsd_clear_carry_flag ? (freebsd_clear_carry_flag = 0) : 0) -# endif -# ifndef PRE_GETCONTEXT -# define PRE_GETCONTEXT 0 -# endif -# ifndef POST_GETCONTEXT -# define POST_GETCONTEXT 0 -# endif -# define ruby_longjmp(env, val) rb_jump_context(env, val) -# define ruby_setjmp(just_before_setjmp, j) ((j)->status = 0, \ - (just_before_setjmp), \ - PRE_GETCONTEXT, \ - getcontext(&(j)->context), \ - POST_GETCONTEXT, \ - (j)->status) -#else -# if !defined(setjmp) && defined(HAVE__SETJMP) -# define ruby_setjmp(just_before_setjmp, env) \ - ((just_before_setjmp), _setjmp(env)) -# define ruby_longjmp(env,val) _longjmp(env,val) -# else -# define ruby_setjmp(just_before_setjmp, env) \ - ((just_before_setjmp), setjmp(env)) -# define ruby_longjmp(env,val) longjmp(env,val) -# endif -#endif - -#include <sys/types.h> -#include <signal.h> -#include <errno.h> - -#if defined(__VMS) -#pragma nostandard -#endif - -#ifdef HAVE_SYS_SELECT_H -#include <sys/select.h> -#endif - -#include <sys/stat.h> - -VALUE rb_cProc; -VALUE rb_cBinding; -static VALUE proc_invoke _((VALUE,VALUE,VALUE,VALUE)); -static VALUE rb_f_binding _((VALUE)); -static void rb_f_END _((void)); -static VALUE rb_f_block_given_p _((void)); -static VALUE block_pass _((VALUE,NODE*)); - -VALUE rb_cMethod; -static VALUE method_call _((int, VALUE*, VALUE)); -VALUE rb_cUnboundMethod; -static VALUE umethod_bind _((VALUE, VALUE)); -static VALUE rb_mod_define_method _((int, VALUE*, VALUE)); -NORETURN(static void rb_raise_jump _((VALUE))); -static VALUE rb_make_exception _((int argc, VALUE *argv)); - -static int scope_vmode; -#define SCOPE_PUBLIC 0 -#define SCOPE_PRIVATE 1 -#define SCOPE_PROTECTED 2 -#define SCOPE_MODFUNC 5 -#define SCOPE_MASK 7 -#define SCOPE_SET(f) (scope_vmode=(f)) -#define SCOPE_TEST(f) (scope_vmode&(f)) - -VALUE (*ruby_sandbox_save)_((rb_thread_t)); -VALUE (*ruby_sandbox_restore)_((rb_thread_t)); -NODE* ruby_current_node; -int ruby_safe_level = 0; -/* safe-level: - 0 - strings from streams/environment/ARGV are tainted (default) - 1 - no dangerous operation by tainted value - 2 - process/file operations prohibited - 3 - all generated objects are tainted - 4 - no global (non-tainted) variable modification/no direct output -*/ - -static VALUE safe_getter _((void)); -static void safe_setter _((VALUE val)); - -void -rb_secure(level) - int level; -{ - if (level <= ruby_safe_level) { - if (ruby_frame->last_func) { - rb_raise(rb_eSecurityError, "Insecure operation `%s' at level %d", - rb_id2name(ruby_frame->last_func), ruby_safe_level); - } - else { - rb_raise(rb_eSecurityError, "Insecure operation at level %d", ruby_safe_level); - } - } -} - -void -rb_secure_update(obj) - VALUE obj; -{ - if (!OBJ_TAINTED(obj)) rb_secure(4); -} - -void -rb_check_safe_obj(x) - VALUE x; -{ - if (ruby_safe_level > 0 && OBJ_TAINTED(x)){ - if (ruby_frame->last_func) { - rb_raise(rb_eSecurityError, "Insecure operation - %s", - rb_id2name(ruby_frame->last_func)); - } - else { - rb_raise(rb_eSecurityError, "Insecure operation: -r"); - } - } - rb_secure(4); -} - -void -rb_check_safe_str(x) - VALUE x; -{ - rb_check_safe_obj(x); - if (TYPE(x)!= T_STRING) { - rb_raise(rb_eTypeError, "wrong argument type %s (expected String)", - rb_obj_classname(x)); - } -} - -NORETURN(static void print_undef _((VALUE, ID))); -static void -print_undef(klass, id) - VALUE klass; - ID id; -{ - rb_name_error(id, "undefined method `%s' for %s `%s'", - rb_id2name(id), - (TYPE(klass) == T_MODULE) ? "module" : "class", - rb_class2name(klass)); -} - -static ID removed, singleton_removed, undefined, singleton_undefined; - -#define CACHE_SIZE 0x800 -#define CACHE_MASK 0x7ff -#define EXPR1(c,m) ((((c)>>3)^(m))&CACHE_MASK) - -struct cache_entry { /* method hash table. */ - ID mid; /* method's id */ - ID mid0; /* method's original id */ - VALUE klass; /* receiver's class */ - VALUE origin; /* where method defined */ - NODE *method; - int noex; -}; - -static struct cache_entry cache[CACHE_SIZE]; -static int ruby_running = 0; - -void -rb_clear_cache() -{ - struct cache_entry *ent, *end; - - if (!ruby_running) return; - ent = cache; end = ent + CACHE_SIZE; - while (ent < end) { - ent->mid = 0; - ent++; - } -} - -static void -rb_clear_cache_for_undef(klass, id) - VALUE klass; - ID id; -{ - struct cache_entry *ent, *end; - - if (!ruby_running) return; - ent = cache; end = ent + CACHE_SIZE; - while (ent < end) { - if (ent->mid == id && - RCLASS(ent->origin)->m_tbl == RCLASS(klass)->m_tbl) { - ent->mid = 0; - } - ent++; - } -} - -static void -rb_clear_cache_by_id(id) - ID id; -{ - struct cache_entry *ent, *end; - - if (!ruby_running) return; - ent = cache; end = ent + CACHE_SIZE; - while (ent < end) { - if (ent->mid == id) { - ent->mid = 0; - } - ent++; - } -} - -void -rb_clear_cache_by_class(klass) - VALUE klass; -{ - struct cache_entry *ent, *end; - - if (!ruby_running) return; - ent = cache; end = ent + CACHE_SIZE; - while (ent < end) { - if (ent->klass == klass || ent->origin == klass) { - ent->mid = 0; - } - ent++; - } -} - -static ID init, eqq, each, aref, aset, match, missing; -static ID added, singleton_added; -static ID __id__, __send__, respond_to; - -#define NOEX_TAINTED 8 -#define NOEX_SAFE(n) ((n) >> 4) -#define NOEX_WITH(n, v) ((n) | (v) << 4) -#define NOEX_WITH_SAFE(n) NOEX_WITH(n, ruby_safe_level) - -void -rb_add_method(klass, mid, node, noex) - VALUE klass; - ID mid; - NODE *node; - int noex; -{ - NODE *body; - - if (NIL_P(klass)) klass = rb_cObject; - if (ruby_safe_level >= 4 && (klass == rb_cObject || !OBJ_TAINTED(klass))) { - rb_raise(rb_eSecurityError, "Insecure: can't define method"); - } - if (!FL_TEST(klass, FL_SINGLETON) && - node && nd_type(node) != NODE_ZSUPER && - (mid == rb_intern("initialize" )|| mid == rb_intern("initialize_copy"))) { - noex = NOEX_PRIVATE | noex; - } - else if (FL_TEST(klass, FL_SINGLETON) && node && nd_type(node) == NODE_CFUNC && - mid == rb_intern("allocate")) { - rb_warn("defining %s.allocate is deprecated; use rb_define_alloc_func()", - rb_class2name(rb_iv_get(klass, "__attached__"))); - mid = ID_ALLOCATOR; - } - if (OBJ_FROZEN(klass)) rb_error_frozen("class/module"); - rb_clear_cache_by_id(mid); - body = NEW_METHOD(node, NOEX_WITH_SAFE(noex)); - st_insert(RCLASS(klass)->m_tbl, mid, (st_data_t)body); - if (node && mid != ID_ALLOCATOR && ruby_running) { - if (FL_TEST(klass, FL_SINGLETON)) { - rb_funcall(rb_iv_get(klass, "__attached__"), singleton_added, 1, ID2SYM(mid)); - } - else { - rb_funcall(klass, added, 1, ID2SYM(mid)); - } - } -} - -void -rb_define_alloc_func(klass, func) - VALUE klass; - VALUE (*func) _((VALUE)); -{ - Check_Type(klass, T_CLASS); - rb_add_method(rb_singleton_class(klass), ID_ALLOCATOR, NEW_CFUNC(func, 0), - NOEX_PRIVATE); -} - -void -rb_undef_alloc_func(klass) - VALUE klass; -{ - Check_Type(klass, T_CLASS); - rb_add_method(rb_singleton_class(klass), ID_ALLOCATOR, 0, NOEX_UNDEF); -} - -static NODE* -search_method(klass, id, origin) - VALUE klass, *origin; - ID id; -{ - st_data_t body; - - if (!klass) return 0; - while (!st_lookup(RCLASS(klass)->m_tbl, id, &body)) { - klass = RCLASS(klass)->super; - if (!klass) return 0; - } - - if (origin) *origin = klass; - return (NODE *)body; -} - -static NODE* -rb_get_method_body(klassp, idp, noexp) - VALUE *klassp; - ID *idp; - int *noexp; -{ - ID id = *idp; - VALUE klass = *klassp; - VALUE origin; - NODE * volatile body; - struct cache_entry *ent; - - if ((body = search_method(klass, id, &origin)) == 0 || !body->nd_body) { - /* store empty info in cache */ - ent = cache + EXPR1(klass, id); - ent->klass = klass; - ent->origin = klass; - ent->mid = ent->mid0 = id; - ent->noex = 0; - ent->method = 0; - - return 0; - } - - if (ruby_running) { - /* store in cache */ - ent = cache + EXPR1(klass, id); - ent->klass = klass; - ent->noex = body->nd_noex; - if (noexp) *noexp = body->nd_noex; - body = body->nd_body; - if (nd_type(body) == NODE_FBODY) { - ent->mid = id; - *klassp = body->nd_orig; - ent->origin = body->nd_orig; - *idp = ent->mid0 = body->nd_mid; - body = ent->method = body->nd_head; - } - else { - *klassp = origin; - ent->origin = origin; - ent->mid = ent->mid0 = id; - ent->method = body; - } - } - else { - if (noexp) *noexp = body->nd_noex; - body = body->nd_body; - if (nd_type(body) == NODE_FBODY) { - *klassp = body->nd_orig; - *idp = body->nd_mid; - body = body->nd_head; - } - else { - *klassp = origin; - } - } - - return body; -} - -NODE* -rb_method_node(klass, id) - VALUE klass; - ID id; -{ - int noex; - - return rb_get_method_body(&klass, &id, &noex); -} - -static void -remove_method(klass, mid) - VALUE klass; - ID mid; -{ - st_data_t data; - NODE *body = 0; - - if (klass == rb_cObject) { - rb_secure(4); - } - if (ruby_safe_level >= 4 && !OBJ_TAINTED(klass)) { - rb_raise(rb_eSecurityError, "Insecure: can't remove method"); - } - if (OBJ_FROZEN(klass)) rb_error_frozen("class/module"); - if (mid == __id__ || mid == __send__ || mid == init) { - rb_warn("removing `%s' may cause serious problem", rb_id2name(mid)); - } - if (st_lookup(RCLASS(klass)->m_tbl, mid, &data)) { - body = (NODE *)data; - if (!body || !body->nd_body) body = 0; - else { - st_delete(RCLASS(klass)->m_tbl, &mid, &data); - } - } - if (!body) { - rb_name_error(mid, "method `%s' not defined in %s", - rb_id2name(mid), rb_class2name(klass)); - } - rb_clear_cache_for_undef(klass, mid); - if (FL_TEST(klass, FL_SINGLETON)) { - rb_funcall(rb_iv_get(klass, "__attached__"), singleton_removed, 1, ID2SYM(mid)); - } - else { - rb_funcall(klass, removed, 1, ID2SYM(mid)); - } -} - -void -rb_remove_method(klass, name) - VALUE klass; - const char *name; -{ - remove_method(klass, rb_intern(name)); -} - -/* - * call-seq: - * remove_method(symbol) => self - * - * Removes the method identified by _symbol_ from the current - * class. For an example, see <code>Module.undef_method</code>. - */ - -static VALUE -rb_mod_remove_method(argc, argv, mod) - int argc; - VALUE *argv; - VALUE mod; -{ - int i; - - for (i=0; i<argc; i++) { - remove_method(mod, rb_to_id(argv[i])); - } - return mod; -} - -#undef rb_disable_super -#undef rb_enable_super - -void -rb_disable_super(klass, name) - VALUE klass; - const char *name; -{ - /* obsolete - no use */ -} - -void -rb_enable_super(klass, name) - VALUE klass; - const char *name; -{ - rb_warn("rb_enable_super() is obsolete"); -} - -static void -rb_export_method(klass, name, noex) - VALUE klass; - ID name; - ID noex; -{ - NODE *body; - VALUE origin; - - if (klass == rb_cObject) { - rb_secure(4); - } - body = search_method(klass, name, &origin); - if (!body && TYPE(klass) == T_MODULE) { - body = search_method(rb_cObject, name, &origin); - } - if (!body || !body->nd_body) { - print_undef(klass, name); - } - if (body->nd_noex != noex) { - if (klass == origin) { - body->nd_noex = noex; - } - else { - rb_add_method(klass, name, NEW_ZSUPER(), noex); - } - } -} - -int -rb_method_boundp(klass, id, ex) - VALUE klass; - ID id; - int ex; -{ - struct cache_entry *ent; - int noex; - - /* is it in the method cache? */ - ent = cache + EXPR1(klass, id); - if (ent->mid == id && ent->klass == klass) { - if (ex && (ent->noex & NOEX_PRIVATE)) - return Qfalse; - if (!ent->method) return Qfalse; - return Qtrue; - } - if (rb_get_method_body(&klass, &id, &noex)) { - if (ex && (noex & NOEX_PRIVATE)) - return Qfalse; - return Qtrue; - } - return Qfalse; -} - -void -rb_attr(klass, id, read, write, ex) - VALUE klass; - ID id; - int read, write, ex; -{ - const char *name; - char *buf; - ID attriv; - int noex; - size_t len; - - if (!ex) noex = NOEX_PUBLIC; - else { - if (SCOPE_TEST(SCOPE_PRIVATE)) { - noex = NOEX_PRIVATE; - rb_warning((scope_vmode == SCOPE_MODFUNC) ? - "attribute accessor as module_function" : - "private attribute?"); - } - else if (SCOPE_TEST(SCOPE_PROTECTED)) { - noex = NOEX_PROTECTED; - } - else { - noex = NOEX_PUBLIC; - } - } - - if (!rb_is_local_id(id) && !rb_is_const_id(id)) { - rb_name_error(id, "invalid attribute name `%s'", rb_id2name(id)); - } - name = rb_id2name(id); - if (!name) { - rb_raise(rb_eArgError, "argument needs to be symbol or string"); - } - len = strlen(name)+2; - buf = ALLOCA_N(char,len); - snprintf(buf, len, "@%s", name); - attriv = rb_intern(buf); - if (read) { - rb_add_method(klass, id, NEW_IVAR(attriv), noex); - } - if (write) { - rb_add_method(klass, rb_id_attrset(id), NEW_ATTRSET(attriv), noex); - } -} - -extern int ruby_in_compile; - -VALUE ruby_errinfo = Qnil; -extern NODE *ruby_eval_tree_begin; -extern NODE *ruby_eval_tree; -extern int ruby_nerrs; - -VALUE rb_eLocalJumpError; -VALUE rb_eSysStackError; - -extern VALUE ruby_top_self; - -struct FRAME *ruby_frame; -struct SCOPE *ruby_scope; -static struct FRAME *top_frame; -static struct SCOPE *top_scope; - -static unsigned long frame_unique = 0; - -#define PUSH_FRAME() do { \ - volatile struct FRAME _frame; \ - _frame.prev = ruby_frame; \ - _frame.tmp = 0; \ - _frame.node = ruby_current_node; \ - _frame.iter = ruby_iter->iter; \ - _frame.argc = 0; \ - _frame.flags = 0; \ - _frame.uniq = frame_unique++; \ - ruby_frame = &_frame - -#define POP_FRAME() \ - ruby_current_node = _frame.node; \ - ruby_frame = _frame.prev; \ -} while (0) - -struct BLOCK { - NODE *var; - NODE *body; - VALUE self; - struct FRAME frame; - struct SCOPE *scope; - VALUE klass; - NODE *cref; - int iter; - int vmode; - int flags; - int uniq; - struct RVarmap *dyna_vars; - VALUE orig_thread; - VALUE wrapper; - VALUE block_obj; - struct BLOCK *outer; - struct BLOCK *prev; -}; - -#define BLOCK_D_SCOPE 1 -#define BLOCK_LAMBDA 2 - -static struct BLOCK *ruby_block; -static unsigned long block_unique = 1; - -#define PUSH_BLOCK(v,b) do { \ - struct BLOCK _block; \ - _block.var = (v); \ - _block.body = (b); \ - _block.self = self; \ - _block.frame = *ruby_frame; \ - _block.klass = ruby_class; \ - _block.cref = ruby_cref; \ - _block.frame.node = ruby_current_node;\ - _block.scope = ruby_scope; \ - _block.prev = ruby_block; \ - _block.outer = ruby_block; \ - _block.iter = ruby_iter->iter; \ - _block.vmode = scope_vmode; \ - _block.flags = BLOCK_D_SCOPE; \ - _block.dyna_vars = ruby_dyna_vars; \ - _block.wrapper = ruby_wrapper; \ - _block.block_obj = 0; \ - _block.uniq = (b)?block_unique++:0; \ - if (b) { \ - prot_tag->blkid = _block.uniq; \ - } \ - ruby_block = &_block - -#define POP_BLOCK() \ - ruby_block = _block.prev; \ -} while (0) - -struct RVarmap *ruby_dyna_vars; -#define PUSH_VARS() do { \ - struct RVarmap * volatile _old; \ - _old = ruby_dyna_vars; \ - ruby_dyna_vars = 0 - -#define POP_VARS() \ - if (_old && (ruby_scope->flags & SCOPE_DONT_RECYCLE)) {\ - if (RBASIC(_old)->flags) /* unless it's already recycled */ \ - FL_SET(_old, DVAR_DONT_RECYCLE); \ - }\ - ruby_dyna_vars = _old; \ -} while (0) - -#define DVAR_DONT_RECYCLE FL_USER2 - -#define DMETHOD_P() (ruby_frame->flags & FRAME_DMETH) - -static struct RVarmap* -new_dvar(id, value, prev) - ID id; - VALUE value; - struct RVarmap *prev; -{ - NEWOBJ(vars, struct RVarmap); - OBJSETUP(vars, 0, T_VARMAP); - vars->id = id; - vars->val = value; - vars->next = prev; - - return vars; -} - -VALUE -rb_dvar_defined(id) - ID id; -{ - struct RVarmap *vars = ruby_dyna_vars; - - while (vars) { - if (vars->id == id) return Qtrue; - vars = vars->next; - } - return Qfalse; -} - -VALUE -rb_dvar_curr(id) - ID id; -{ - struct RVarmap *vars = ruby_dyna_vars; - - while (vars) { - if (vars->id == 0) break; - if (vars->id == id) return Qtrue; - vars = vars->next; - } - return Qfalse; -} - -VALUE -rb_dvar_ref(id) - ID id; -{ - struct RVarmap *vars = ruby_dyna_vars; - - while (vars) { - if (vars->id == id) { - return vars->val; - } - vars = vars->next; - } - return Qnil; -} - -void -rb_dvar_push(id, value) - ID id; - VALUE value; -{ - ruby_dyna_vars = new_dvar(id, value, ruby_dyna_vars); -} - -static void -dvar_asgn_internal(id, value, curr) - ID id; - VALUE value; - int curr; -{ - int n = 0; - struct RVarmap *vars = ruby_dyna_vars; - - while (vars) { - if (curr && vars->id == 0) { - /* first null is a dvar header */ - n++; - if (n == 2) break; - } - if (vars->id == id) { - vars->val = value; - return; - } - vars = vars->next; - } - if (!ruby_dyna_vars) { - ruby_dyna_vars = new_dvar(id, value, 0); - } - else { - vars = new_dvar(id, value, ruby_dyna_vars->next); - ruby_dyna_vars->next = vars; - } -} - -static inline void -dvar_asgn(id, value) - ID id; - VALUE value; -{ - dvar_asgn_internal(id, value, 0); -} - -static inline void -dvar_asgn_curr(id, value) - ID id; - VALUE value; -{ - dvar_asgn_internal(id, value, 1); -} - -VALUE * -rb_svar(cnt) - int cnt; -{ - struct RVarmap *vars = ruby_dyna_vars; - ID id; - - if (!ruby_scope->local_tbl) return NULL; - if (cnt >= ruby_scope->local_tbl[0]) return NULL; - id = ruby_scope->local_tbl[cnt+1]; - while (vars) { - if (vars->id == id) return &vars->val; - vars = vars->next; - } - if (ruby_scope->local_vars == 0) return NULL; - return &ruby_scope->local_vars[cnt]; -} - -struct iter { - int iter; - struct iter *prev; -}; -static struct iter *ruby_iter; - -#define ITER_NOT 0 -#define ITER_PRE 1 -#define ITER_CUR 2 -#define ITER_PAS 3 - -#define PUSH_ITER(i) do { \ - struct iter _iter; \ - _iter.prev = ruby_iter; \ - _iter.iter = (i); \ - ruby_iter = &_iter - -#define POP_ITER() \ - ruby_iter = _iter.prev; \ -} while (0) - -struct tag { - rb_jmpbuf_t buf; - struct FRAME *frame; - struct iter *iter; - VALUE tag; - VALUE retval; - struct SCOPE *scope; - VALUE dst; - struct tag *prev; - int blkid; -}; -static struct tag *prot_tag; - -#define PUSH_TAG(ptag) do { \ - struct tag _tag; \ - _tag.retval = Qnil; \ - _tag.frame = ruby_frame; \ - _tag.iter = ruby_iter; \ - _tag.prev = prot_tag; \ - _tag.scope = ruby_scope; \ - _tag.tag = ptag; \ - _tag.dst = 0; \ - _tag.blkid = 0; \ - prot_tag = &_tag - -#define PROT_NONE Qfalse /* 0 */ -#define PROT_THREAD Qtrue /* 2 */ -#define PROT_FUNC INT2FIX(0) /* 1 */ -#define PROT_LOOP INT2FIX(1) /* 3 */ -#define PROT_LAMBDA INT2FIX(2) /* 5 */ -#define PROT_YIELD INT2FIX(3) /* 7 */ - -#define EXEC_TAG() (FLUSH_REGISTER_WINDOWS, ruby_setjmp(((void)0), prot_tag->buf)) - -#define JUMP_TAG(st) do { \ - ruby_frame = prot_tag->frame; \ - ruby_iter = prot_tag->iter; \ - ruby_longjmp(prot_tag->buf,(st)); \ -} while (0) - -#define POP_TAG() \ - prot_tag = _tag.prev; \ -} while (0) - -#define TAG_DST() (_tag.dst == (VALUE)ruby_frame->uniq) - -#define TAG_RETURN 0x1 -#define TAG_BREAK 0x2 -#define TAG_NEXT 0x3 -#define TAG_RETRY 0x4 -#define TAG_REDO 0x5 -#define TAG_RAISE 0x6 -#define TAG_THROW 0x7 -#define TAG_FATAL 0x8 -#define TAG_MASK 0xf - -VALUE ruby_class; -static VALUE ruby_wrapper; /* security wrapper */ - -#define PUSH_CLASS(c) do { \ - volatile VALUE _class = ruby_class; \ - ruby_class = (c) - -#define POP_CLASS() ruby_class = _class; \ -} while (0) - -NODE *ruby_cref = 0; -NODE *ruby_top_cref; -#define PUSH_CREF(c) ruby_cref = NEW_NODE(NODE_CREF,(c),0,ruby_cref) -#define POP_CREF() ruby_cref = ruby_cref->nd_next - -#define PUSH_SCOPE() do { \ - volatile int _vmode = scope_vmode; \ - struct SCOPE * volatile _old; \ - NEWOBJ(_scope, struct SCOPE); \ - OBJSETUP(_scope, 0, T_SCOPE); \ - _scope->local_tbl = 0; \ - _scope->local_vars = 0; \ - _scope->flags = 0; \ - _old = ruby_scope; \ - ruby_scope = _scope; \ - scope_vmode = SCOPE_PUBLIC - -rb_thread_t rb_curr_thread; -rb_thread_t rb_main_thread; -#define main_thread rb_main_thread -#define curr_thread rb_curr_thread - -static void scope_dup _((struct SCOPE *)); - -#define POP_SCOPE() \ - if (ruby_scope->flags & SCOPE_DONT_RECYCLE) {\ - if (_old) scope_dup(_old); \ - } \ - if (!(ruby_scope->flags & SCOPE_MALLOC)) {\ - ruby_scope->local_vars = 0; \ - ruby_scope->local_tbl = 0; \ - if (!(ruby_scope->flags & SCOPE_DONT_RECYCLE) && \ - ruby_scope != top_scope) { \ - rb_gc_force_recycle((VALUE)ruby_scope);\ - } \ - } \ - ruby_scope->flags |= SCOPE_NOSTACK; \ - ruby_scope = _old; \ - scope_vmode = _vmode; \ -} while (0) - -static VALUE rb_eval _((VALUE,NODE*)); -static VALUE eval _((VALUE,VALUE,VALUE,char*,int)); -static NODE *compile _((VALUE, char*, int)); - -static VALUE rb_yield_0 _((VALUE, VALUE, VALUE, int, int)); - -#define YIELD_LAMBDA_CALL 1 -#define YIELD_PROC_CALL 2 -#define YIELD_PUBLIC_DEF 4 -#define YIELD_FUNC_AVALUE 1 -#define YIELD_FUNC_SVALUE 2 - -static VALUE rb_call _((VALUE,VALUE,ID,int,const VALUE*,int,VALUE)); -static VALUE module_setup _((VALUE,NODE*)); - -static VALUE massign _((VALUE,NODE*,VALUE,int)); -static void assign _((VALUE,NODE*,VALUE,int)); - -typedef struct event_hook { - rb_event_hook_func_t func; - rb_event_t events; - struct event_hook *next; -} rb_event_hook_t; - -static rb_event_hook_t *event_hooks; - -#define EXEC_EVENT_HOOK(event, node, self, id, klass) \ - do { \ - rb_event_hook_t *hook = event_hooks; \ - rb_event_hook_func_t hook_func; \ - rb_event_t events; \ - \ - while (hook) { \ - hook_func = hook->func; \ - events = hook->events; \ - hook = hook->next; \ - if (events & event) \ - (*hook_func)(event, node, self, id, klass); \ - } \ - } while (0) - -static VALUE trace_func = 0; -static int tracing = 0; -static void call_trace_func _((rb_event_t,NODE*,VALUE,ID,VALUE)); - -#if 0 -#define SET_CURRENT_SOURCE() (ruby_sourcefile = ruby_current_node->nd_file, \ - ruby_sourceline = nd_line(ruby_current_node)) -#else -#define SET_CURRENT_SOURCE() ((void)0) -#endif - -void -ruby_set_current_source() -{ - if (ruby_current_node) { - ruby_sourcefile = ruby_current_node->nd_file; - ruby_sourceline = nd_line(ruby_current_node); - } -} - -static void -#ifdef HAVE_STDARG_PROTOTYPES -warn_printf(const char *fmt, ...) -#else -warn_printf(fmt, va_alist) - const char *fmt; - va_dcl -#endif -{ - char buf[BUFSIZ]; - va_list args; - - va_init_list(args, fmt); - vsnprintf(buf, BUFSIZ, fmt, args); - va_end(args); - rb_write_error(buf); -} - -#define warn_print(x) rb_write_error(x) -#define warn_print2(x,l) rb_write_error2(x,l) - -static void -error_pos() -{ - ruby_set_current_source(); - if (ruby_sourcefile) { - if (ruby_frame->last_func) { - warn_printf("%s:%d:in `%s'", ruby_sourcefile, ruby_sourceline, - rb_id2name(ruby_frame->orig_func)); - } - else if (ruby_sourceline == 0) { - warn_printf("%s", ruby_sourcefile); - } - else { - warn_printf("%s:%d", ruby_sourcefile, ruby_sourceline); - } - } -} - -VALUE rb_check_backtrace(VALUE); - -static VALUE -get_backtrace(info) - VALUE info; -{ - if (NIL_P(info)) return Qnil; - info = rb_funcall(info, rb_intern("backtrace"), 0); - if (NIL_P(info)) return Qnil; - return rb_check_backtrace(info); -} - -static void -set_backtrace(info, bt) - VALUE info, bt; -{ - rb_funcall(info, rb_intern("set_backtrace"), 1, bt); -} - -static void -error_print() -{ - VALUE errat = Qnil; /* OK */ - volatile VALUE eclass, e; - char *einfo; - long elen; - - if (NIL_P(ruby_errinfo)) return; - - PUSH_TAG(PROT_NONE); - if (EXEC_TAG() == 0) { - errat = get_backtrace(ruby_errinfo); - } - else { - errat = Qnil; - } - if (EXEC_TAG()) goto error; - if (NIL_P(errat)){ - ruby_set_current_source(); - if (ruby_sourcefile) - warn_printf("%s:%d", ruby_sourcefile, ruby_sourceline); - else - warn_printf("%d", ruby_sourceline); - } - else if (RARRAY(errat)->len == 0) { - error_pos(); - } - else { - VALUE mesg = RARRAY(errat)->ptr[0]; - - if (NIL_P(mesg)) error_pos(); - else { - warn_print2(RSTRING(mesg)->ptr, RSTRING(mesg)->len); - } - } - - eclass = CLASS_OF(ruby_errinfo); - if (EXEC_TAG() == 0) { - e = rb_funcall(ruby_errinfo, rb_intern("message"), 0, 0); - StringValue(e); - einfo = RSTRING(e)->ptr; - elen = RSTRING(e)->len; - } - else { - einfo = ""; - elen = 0; - } - if (EXEC_TAG()) goto error; - if (eclass == rb_eRuntimeError && elen == 0) { - warn_print(": unhandled exception\n"); - } - else { - VALUE epath; - - epath = rb_class_name(eclass); - if (elen == 0) { - warn_print(": "); - warn_print2(RSTRING(epath)->ptr, RSTRING(epath)->len); - warn_print("\n"); - } - else { - char *tail = 0; - long len = elen; - - if (RSTRING(epath)->ptr[0] == '#') epath = 0; - if ((tail = memchr(einfo, '\n', elen)) != 0) { - len = tail - einfo; - tail++; /* skip newline */ - } - warn_print(": "); - warn_print2(einfo, len); - if (epath) { - warn_print(" ("); - warn_print2(RSTRING(epath)->ptr, RSTRING(epath)->len); - warn_print(")\n"); - } - if (tail && elen>len+1) { - warn_print2(tail, elen-len-1); - if (einfo[elen-1] != '\n') warn_print2("\n", 1); - } - } - } - - if (!NIL_P(errat)) { - long i; - struct RArray *ep = RARRAY(errat); - -#define TRACE_MAX (TRACE_HEAD+TRACE_TAIL+5) -#define TRACE_HEAD 8 -#define TRACE_TAIL 5 - - ep = RARRAY(errat); - for (i=1; i<ep->len; i++) { - if (TYPE(ep->ptr[i]) == T_STRING) { - warn_printf("\tfrom %s\n", RSTRING(ep->ptr[i])->ptr); - } - if (i == TRACE_HEAD && ep->len > TRACE_MAX) { - warn_printf("\t ... %ld levels...\n", - ep->len - TRACE_HEAD - TRACE_TAIL); - i = ep->len - TRACE_TAIL; - } - } - } - error: - POP_TAG(); -} - -#if defined(__APPLE__) -#define environ (*_NSGetEnviron()) -#elif !defined(_WIN32) && !defined(__MACOS__) || defined(_WIN32_WCE) -extern char **environ; -#endif -char **rb_origenviron; - -void rb_call_inits _((void)); -void Init_stack _((VALUE*)); -void Init_heap _((void)); -void Init_ext _((void)); - -#ifdef HAVE_NATIVETHREAD -static rb_nativethread_t ruby_thid; -int -is_ruby_native_thread() { - return NATIVETHREAD_EQUAL(ruby_thid, NATIVETHREAD_CURRENT()); -} - -# ifdef HAVE_NATIVETHREAD_KILL -void -ruby_native_thread_kill(sig) - int sig; -{ - NATIVETHREAD_KILL(ruby_thid, sig); -} -# endif -#endif - -void -ruby_init() -{ - static int initialized = 0; - static struct FRAME frame; - static struct iter iter; - int state; - - if (initialized) - return; - initialized = 1; -#ifdef HAVE_NATIVETHREAD - ruby_thid = NATIVETHREAD_CURRENT(); -#endif - - ruby_frame = top_frame = &frame; - ruby_iter = &iter; - -#ifdef __MACOS__ - rb_origenviron = 0; -#else - rb_origenviron = environ; -#endif - - Init_stack((void*)&state); - Init_heap(); - PUSH_SCOPE(); - ruby_scope->local_vars = 0; - ruby_scope->local_tbl = 0; - top_scope = ruby_scope; - /* default visibility is private at toplevel */ - SCOPE_SET(SCOPE_PRIVATE); - - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - rb_call_inits(); - ruby_class = rb_cObject; - ruby_frame->self = ruby_top_self; - ruby_top_cref = rb_node_newnode(NODE_CREF,rb_cObject,0,0); - ruby_cref = ruby_top_cref; - rb_define_global_const("TOPLEVEL_BINDING", rb_f_binding(ruby_top_self)); -#ifdef __MACOS__ - _macruby_init(); -#elif defined(__VMS) - _vmsruby_init(); -#endif - ruby_prog_init(); - ALLOW_INTS; - } - POP_TAG(); - if (state) { - error_print(); - exit(EXIT_FAILURE); - } - POP_SCOPE(); - ruby_scope = top_scope; - top_scope->flags &= ~SCOPE_NOSTACK; - ruby_running = 1; -} - -static VALUE -eval_node(self, node) - VALUE self; - NODE *node; -{ - NODE *beg_tree = ruby_eval_tree_begin; - - ruby_eval_tree_begin = 0; - if (beg_tree) { - rb_eval(self, beg_tree); - } - - if (!node) return Qnil; - return rb_eval(self, node); -} - -int ruby_in_eval; - -static void rb_thread_cleanup _((void)); -static void rb_thread_wait_other_threads _((void)); - -static int thread_no_ensure _((void)); - -static VALUE exception_error; -static VALUE sysstack_error; - -static int -sysexit_status(err) - VALUE err; -{ - VALUE st = rb_iv_get(err, "status"); - return NUM2INT(st); -} - -static int -error_handle(ex) - int ex; -{ - int status = EXIT_FAILURE; - rb_thread_t th = curr_thread; - - if (rb_thread_set_raised(th)) - return EXIT_FAILURE; - switch (ex & TAG_MASK) { - case 0: - status = EXIT_SUCCESS; - break; - - case TAG_RETURN: - error_pos(); - warn_print(": unexpected return\n"); - break; - case TAG_NEXT: - error_pos(); - warn_print(": unexpected next\n"); - break; - case TAG_BREAK: - error_pos(); - warn_print(": unexpected break\n"); - break; - case TAG_REDO: - error_pos(); - warn_print(": unexpected redo\n"); - break; - case TAG_RETRY: - error_pos(); - warn_print(": retry outside of rescue clause\n"); - break; - case TAG_THROW: - if (prot_tag && prot_tag->frame && prot_tag->frame->node) { - NODE *tag = prot_tag->frame->node; - warn_printf("%s:%d: uncaught throw\n", - tag->nd_file, nd_line(tag)); - } - else { - error_pos(); - warn_printf(": unexpected throw\n"); - } - break; - case TAG_RAISE: - case TAG_FATAL: - if (rb_obj_is_kind_of(ruby_errinfo, rb_eSystemExit)) { - status = sysexit_status(ruby_errinfo); - } - else if (rb_obj_is_instance_of(ruby_errinfo, rb_eSignal)) { - /* no message when exiting by signal */ - } - else { - error_print(); - } - break; - default: - rb_bug("Unknown longjmp status %d", ex); - break; - } - rb_thread_reset_raised(th); - return status; -} - -void -ruby_options(argc, argv) - int argc; - char **argv; -{ - int state; - - Init_stack((void*)&state); - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - ruby_process_options(argc, argv); - } - else { - trace_func = 0; - tracing = 0; - exit(error_handle(state)); - } - POP_TAG(); -} - -void rb_exec_end_proc _((void)); - -static void -ruby_finalize_0() -{ - PUSH_TAG(PROT_NONE); - if (EXEC_TAG() == 0) { - rb_trap_exit(); - } - POP_TAG(); - rb_exec_end_proc(); -} - -static void -ruby_finalize_1() -{ - signal(SIGINT, SIG_DFL); - ruby_errinfo = 0; - rb_gc_call_finalizer_at_exit(); - trace_func = 0; - tracing = 0; -} - -void -ruby_finalize() -{ - ruby_finalize_0(); - ruby_finalize_1(); -} - -int -ruby_cleanup(ex) - int ex; -{ - int state; - volatile VALUE errs[2]; - int nerr; - - errs[1] = ruby_errinfo; - ruby_safe_level = 0; - Init_stack((void *)&state); - ruby_finalize_0(); - errs[0] = ruby_errinfo; - PUSH_TAG(PROT_NONE); - PUSH_ITER(ITER_NOT); - if ((state = EXEC_TAG()) == 0) { - rb_thread_cleanup(); - rb_thread_wait_other_threads(); - } - else if (ex == 0) { - ex = state; - } - POP_ITER(); - ruby_errinfo = errs[1]; - ex = error_handle(ex); - ruby_finalize_1(); - POP_TAG(); - - for (nerr = 0; nerr < sizeof(errs) / sizeof(errs[0]); ++nerr) { - VALUE err = errs[nerr]; - - if (!RTEST(err)) continue; - - if (rb_obj_is_kind_of(err, rb_eSystemExit)) { - return sysexit_status(err); - } - else if (rb_obj_is_kind_of(err, rb_eSignal)) { - VALUE sig = rb_iv_get(err, "signo"); - ruby_default_signal(NUM2INT(sig)); - } - else if (ex == 0) { - ex = 1; - } - } - -#if EXIT_SUCCESS != 0 || EXIT_FAILURE != 1 - switch (ex) { -#if EXIT_SUCCESS != 0 - case 0: return EXIT_SUCCESS; -#endif -#if EXIT_FAILURE != 1 - case 1: return EXIT_FAILURE; -#endif - } -#endif - - return ex; -} - -static int -ruby_exec_internal() -{ - int state; - - PUSH_TAG(PROT_NONE); - PUSH_ITER(ITER_NOT); - /* default visibility is private at toplevel */ - SCOPE_SET(SCOPE_PRIVATE); - if ((state = EXEC_TAG()) == 0) { - eval_node(ruby_top_self, ruby_eval_tree); - } - POP_ITER(); - POP_TAG(); - return state; -} - -void -ruby_stop(ex) - int ex; -{ - exit(ruby_cleanup(ex)); -} - -int -ruby_exec() -{ - volatile NODE *tmp; - - Init_stack((void*)&tmp); - return ruby_exec_internal(); -} - -void -ruby_run() -{ - int state; - static int ex; - - if (ruby_nerrs > 0) exit(EXIT_FAILURE); - state = ruby_exec(); - if (state && !ex) ex = state; - ruby_stop(ex); -} - -static void -compile_error(at) - const char *at; -{ - VALUE str; - - ruby_nerrs = 0; - str = rb_str_buf_new2("compile error"); - if (at) { - rb_str_buf_cat2(str, " in "); - rb_str_buf_cat2(str, at); - } - rb_str_buf_cat(str, "\n", 1); - if (!NIL_P(ruby_errinfo)) { - rb_str_append(str, rb_obj_as_string(ruby_errinfo)); - } - rb_exc_raise(rb_exc_new3(rb_eSyntaxError, str)); -} - -VALUE -rb_eval_string(str) - const char *str; -{ - VALUE v; - NODE *oldsrc = ruby_current_node; - - ruby_current_node = 0; - ruby_sourcefile = rb_source_filename("(eval)"); - v = eval(ruby_top_self, rb_str_new2(str), Qnil, 0, 0); - ruby_current_node = oldsrc; - - return v; -} - -VALUE -rb_eval_string_protect(str, state) - const char *str; - int *state; -{ - return rb_protect((VALUE (*)_((VALUE)))rb_eval_string, (VALUE)str, state); -} - -VALUE -rb_eval_string_wrap(str, state) - const char *str; - int *state; -{ - int status; - VALUE self = ruby_top_self; - VALUE wrapper = ruby_wrapper; - VALUE val; - - PUSH_CLASS(ruby_wrapper = rb_module_new()); - ruby_top_self = rb_obj_clone(ruby_top_self); - rb_extend_object(ruby_top_self, ruby_wrapper); - PUSH_FRAME(); - ruby_frame->last_func = 0; - ruby_frame->last_class = 0; - ruby_frame->self = self; - PUSH_CREF(ruby_wrapper); - PUSH_SCOPE(); - - val = rb_eval_string_protect(str, &status); - ruby_top_self = self; - - POP_SCOPE(); - POP_FRAME(); - POP_CLASS(); - ruby_wrapper = wrapper; - if (state) { - *state = status; - } - else if (status) { - JUMP_TAG(status); - } - return val; -} - -NORETURN(static void localjump_error(const char*, VALUE, int)); -static void -localjump_error(mesg, value, reason) - const char *mesg; - VALUE value; - int reason; -{ - VALUE exc = rb_exc_new2(rb_eLocalJumpError, mesg); - ID id; - - rb_iv_set(exc, "@exit_value", value); - switch (reason) { - case TAG_BREAK: - id = rb_intern("break"); break; - case TAG_REDO: - id = rb_intern("redo"); break; - case TAG_RETRY: - id = rb_intern("retry"); break; - case TAG_NEXT: - id = rb_intern("next"); break; - case TAG_RETURN: - id = rb_intern("return"); break; - default: - id = rb_intern("noreason"); break; - } - rb_iv_set(exc, "@reason", ID2SYM(id)); - rb_exc_raise(exc); -} - -/* - * call_seq: - * local_jump_error.exit_value => obj - * - * Returns the exit value associated with this +LocalJumpError+. - */ -static VALUE -localjump_xvalue(exc) - VALUE exc; -{ - return rb_iv_get(exc, "@exit_value"); -} - -/* - * call-seq: - * local_jump_error.reason => symbol - * - * The reason this block was terminated: - * :break, :redo, :retry, :next, :return, or :noreason. - */ - -static VALUE -localjump_reason(exc) - VALUE exc; -{ - return rb_iv_get(exc, "@reason"); -} - -NORETURN(static void jump_tag_but_local_jump _((int,VALUE))); -static void -jump_tag_but_local_jump(state, val) - int state; - VALUE val; -{ - - if (val == Qundef) val = prot_tag->retval; - switch (state) { - case 0: - break; - case TAG_RETURN: - localjump_error("unexpected return", val, state); - break; - case TAG_BREAK: - localjump_error("unexpected break", val, state); - break; - case TAG_NEXT: - localjump_error("unexpected next", val, state); - break; - case TAG_REDO: - localjump_error("unexpected redo", Qnil, state); - break; - case TAG_RETRY: - localjump_error("retry outside of rescue clause", Qnil, state); - break; - default: - break; - } - JUMP_TAG(state); -} - -VALUE -rb_eval_cmd(cmd, arg, level) - VALUE cmd, arg; - int level; -{ - int state; - VALUE val = Qnil; /* OK */ - struct SCOPE *saved_scope; - volatile int safe = ruby_safe_level; - - if (OBJ_TAINTED(cmd)) { - level = 4; - } - if (TYPE(cmd) != T_STRING) { - PUSH_ITER(ITER_NOT); - PUSH_TAG(PROT_NONE); - ruby_safe_level = level; - if ((state = EXEC_TAG()) == 0) { - val = rb_funcall2(cmd, rb_intern("call"), RARRAY(arg)->len, RARRAY(arg)->ptr); - } - ruby_safe_level = safe; - POP_TAG(); - POP_ITER(); - if (state) JUMP_TAG(state); - return val; - } - - saved_scope = ruby_scope; - ruby_scope = top_scope; - PUSH_FRAME(); - ruby_frame->last_func = 0; - ruby_frame->last_class = 0; - ruby_frame->self = ruby_top_self; - PUSH_CREF(ruby_wrapper ? ruby_wrapper : rb_cObject); - - ruby_safe_level = level; - - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - val = eval(ruby_top_self, cmd, Qnil, 0, 0); - } - if (ruby_scope->flags & SCOPE_DONT_RECYCLE) - scope_dup(saved_scope); - ruby_scope = saved_scope; - ruby_safe_level = safe; - POP_TAG(); - POP_FRAME(); - - if (state) jump_tag_but_local_jump(state, val); - return val; -} - -#define ruby_cbase (ruby_cref->nd_clss) - -static VALUE -ev_const_defined(cref, id, self) - NODE *cref; - ID id; - VALUE self; -{ - NODE *cbase = cref; - VALUE result; - - while (cbase && cbase->nd_next) { - struct RClass *klass = RCLASS(cbase->nd_clss); - - if (!NIL_P(klass)) { - if (klass->iv_tbl && st_lookup(klass->iv_tbl, id, &result)) { - if (result == Qundef && NIL_P(rb_autoload_p((VALUE)klass, id))) { - return Qfalse; - } - return Qtrue; - } - } - cbase = cbase->nd_next; - } - return rb_const_defined(cref->nd_clss, id); -} - -static VALUE -ev_const_get(cref, id, self) - NODE *cref; - ID id; - VALUE self; -{ - NODE *cbase = cref; - VALUE result; - - while (cbase && cbase->nd_next) { - VALUE klass = cbase->nd_clss; - - if (!NIL_P(klass)) { - while (RCLASS(klass)->iv_tbl && - st_lookup(RCLASS(klass)->iv_tbl, id, &result)) { - if (result == Qundef) { - if (!RTEST(rb_autoload_load(klass, id))) break; - continue; - } - return result; - } - } - cbase = cbase->nd_next; - } - return rb_const_get(NIL_P(cref->nd_clss) ? CLASS_OF(self): cref->nd_clss, id); -} - -static VALUE -cvar_cbase() -{ - NODE *cref = ruby_cref; - - while (cref && cref->nd_next && (NIL_P(cref->nd_clss) || FL_TEST(cref->nd_clss, FL_SINGLETON))) { - cref = cref->nd_next; - if (!cref->nd_next) { - rb_warn("class variable access from toplevel singleton method"); - } - } - if (NIL_P(cref->nd_clss)) { - rb_raise(rb_eTypeError, "no class variables available"); - } - return cref->nd_clss; -} - -/* - * call-seq: - * Module.nesting => array - * - * Returns the list of +Modules+ nested at the point of call. - * - * module M1 - * module M2 - * $a = Module.nesting - * end - * end - * $a #=> [M1::M2, M1] - * $a[0].name #=> "M1::M2" - */ - -static VALUE -rb_mod_nesting() -{ - NODE *cbase = ruby_cref; - VALUE ary = rb_ary_new(); - - while (cbase && cbase->nd_next) { - if (!NIL_P(cbase->nd_clss)) rb_ary_push(ary, cbase->nd_clss); - cbase = cbase->nd_next; - } - if (ruby_wrapper && RARRAY(ary)->len == 0) { - rb_ary_push(ary, ruby_wrapper); - } - return ary; -} - -/* - * call-seq: - * Module.constants => array - * - * Returns an array of the names of all constants defined in the - * system. This list includes the names of all modules and classes. - * - * p Module.constants.sort[1..5] - * - * <em>produces:</em> - * - * ["ARGV", "ArgumentError", "Array", "Bignum", "Binding"] - */ - -static VALUE -rb_mod_s_constants() -{ - NODE *cbase = ruby_cref; - void *data = 0; - - while (cbase) { - if (!NIL_P(cbase->nd_clss)) { - data = rb_mod_const_at(cbase->nd_clss, data); - } - cbase = cbase->nd_next; - } - - if (!NIL_P(ruby_cbase)) { - data = rb_mod_const_of(ruby_cbase, data); - } - return rb_const_list(data); -} - -void -rb_frozen_class_p(klass) - VALUE klass; -{ - char *desc = "something(?!)"; - - if (OBJ_FROZEN(klass)) { - if (FL_TEST(klass, FL_SINGLETON)) - desc = "object"; - else { - switch (TYPE(klass)) { - case T_MODULE: - case T_ICLASS: - desc = "module"; break; - case T_CLASS: - desc = "class"; break; - } - } - rb_error_frozen(desc); - } -} - -void -rb_undef(klass, id) - VALUE klass; - ID id; -{ - VALUE origin; - NODE *body; - - if (ruby_cbase == rb_cObject && klass == rb_cObject) { - rb_secure(4); - } - if (ruby_safe_level >= 4 && !OBJ_TAINTED(klass)) { - rb_raise(rb_eSecurityError, "Insecure: can't undef `%s'", rb_id2name(id)); - } - rb_frozen_class_p(klass); - if (id == __id__ || id == __send__ || id == init) { - rb_warn("undefining `%s' may cause serious problem", rb_id2name(id)); - } - body = search_method(klass, id, &origin); - if (!body || !body->nd_body) { - char *s0 = " class"; - VALUE c = klass; - - if (FL_TEST(c, FL_SINGLETON)) { - VALUE obj = rb_iv_get(klass, "__attached__"); - - switch (TYPE(obj)) { - case T_MODULE: - case T_CLASS: - c = obj; - s0 = ""; - } - } - else if (TYPE(c) == T_MODULE) { - s0 = " module"; - } - rb_name_error(id, "undefined method `%s' for%s `%s'", - rb_id2name(id),s0,rb_class2name(c)); - } - rb_add_method(klass, id, 0, NOEX_PUBLIC); - if (FL_TEST(klass, FL_SINGLETON)) { - rb_funcall(rb_iv_get(klass, "__attached__"), - singleton_undefined, 1, ID2SYM(id)); - } - else { - rb_funcall(klass, undefined, 1, ID2SYM(id)); - } -} - -/* - * call-seq: - * undef_method(symbol) => self - * - * Prevents the current class from responding to calls to the named - * method. Contrast this with <code>remove_method</code>, which deletes - * the method from the particular class; Ruby will still search - * superclasses and mixed-in modules for a possible receiver. - * - * class Parent - * def hello - * puts "In parent" - * end - * end - * class Child < Parent - * def hello - * puts "In child" - * end - * end - * - * - * c = Child.new - * c.hello - * - * - * class Child - * remove_method :hello # remove from child, still in parent - * end - * c.hello - * - * - * class Child - * undef_method :hello # prevent any calls to 'hello' - * end - * c.hello - * - * <em>produces:</em> - * - * In child - * In parent - * prog.rb:23: undefined method `hello' for #<Child:0x401b3bb4> (NoMethodError) - */ - -static VALUE -rb_mod_undef_method(argc, argv, mod) - int argc; - VALUE *argv; - VALUE mod; -{ - int i; - - for (i=0; i<argc; i++) { - rb_undef(mod, rb_to_id(argv[i])); - } - return mod; -} - -void -rb_alias(klass, name, def) - VALUE klass; - ID name, def; -{ - VALUE origin; - NODE *orig, *body, *node; - VALUE singleton = 0; - st_data_t data; - - rb_frozen_class_p(klass); - if (name == def) return; - if (klass == rb_cObject) { - rb_secure(4); - } - orig = search_method(klass, def, &origin); - if (!orig || !orig->nd_body) { - if (TYPE(klass) == T_MODULE) { - orig = search_method(rb_cObject, def, &origin); - } - } - if (!orig || !orig->nd_body) { - print_undef(klass, def); - } - if (FL_TEST(klass, FL_SINGLETON)) { - singleton = rb_iv_get(klass, "__attached__"); - } - body = orig->nd_body; - orig->nd_cnt++; - if (nd_type(body) == NODE_FBODY) { /* was alias */ - def = body->nd_mid; - origin = body->nd_orig; - body = body->nd_head; - } - - rb_clear_cache_by_id(name); - if (RTEST(ruby_verbose) && st_lookup(RCLASS(klass)->m_tbl, name, &data)) { - node = (NODE *)data; - if (node->nd_cnt == 0 && node->nd_body) { - rb_warning("discarding old %s", rb_id2name(name)); - } - } - st_insert(RCLASS(klass)->m_tbl, name, - (st_data_t)NEW_METHOD(NEW_FBODY(body, def, origin), - NOEX_WITH_SAFE(orig->nd_noex))); - - if (!ruby_running) return; - - if (singleton) { - rb_funcall(singleton, singleton_added, 1, ID2SYM(name)); - } - else { - rb_funcall(klass, added, 1, ID2SYM(name)); - } -} - -/* - * call-seq: - * alias_method(new_name, old_name) => self - * - * Makes <i>new_name</i> a new copy of the method <i>old_name</i>. This can - * be used to retain access to methods that are overridden. - * - * module Mod - * alias_method :orig_exit, :exit - * def exit(code=0) - * puts "Exiting with code #{code}" - * orig_exit(code) - * end - * end - * include Mod - * exit(99) - * - * <em>produces:</em> - * - * Exiting with code 99 - */ - -static VALUE -rb_mod_alias_method(mod, newname, oldname) - VALUE mod, newname, oldname; -{ - rb_alias(mod, rb_to_id(newname), rb_to_id(oldname)); - return mod; -} - -NODE * -rb_copy_node_scope(node, rval) - NODE *node; - NODE *rval; -{ - NODE *copy = NEW_NODE(NODE_SCOPE,0,rval,node->nd_next); - - if (node->nd_tbl) { - copy->nd_tbl = ALLOC_N(ID, node->nd_tbl[0]+1); - MEMCPY(copy->nd_tbl, node->nd_tbl, ID, node->nd_tbl[0]+1); - } - else { - copy->nd_tbl = 0; - } - return copy; -} - -#ifdef C_ALLOCA -# define TMP_PROTECT NODE * volatile tmp__protect_tmp=0 -# define TMP_ALLOC(n) \ - (tmp__protect_tmp = NEW_NODE(NODE_ALLOCA, \ - ALLOC_N(VALUE,n),tmp__protect_tmp,n), \ - (void*)tmp__protect_tmp->nd_head) -#else -# define TMP_PROTECT typedef int foobazzz -# define TMP_ALLOC(n) ALLOCA_N(VALUE,n) -#endif - -#define SETUP_ARGS0(anode,extra) do {\ - NODE *n = anode;\ - if (!n) {\ - argc = 0;\ - argv = 0;\ - }\ - else if (nd_type(n) == NODE_ARRAY) {\ - argc=anode->nd_alen;\ - if (argc > 0) {\ - int i;\ - n = anode;\ - argv = TMP_ALLOC(argc+extra);\ - for (i=0;i<argc;i++) {\ - argv[i] = rb_eval(self,n->nd_head);\ - n=n->nd_next;\ - }\ - }\ - else {\ - argc = 0;\ - argv = 0;\ - }\ - }\ - else {\ - VALUE args = rb_eval(self,n);\ - if (TYPE(args) != T_ARRAY)\ - args = rb_ary_to_ary(args);\ - argc = RARRAY(args)->len;\ - argv = TMP_ALLOC(argc+extra);\ - MEMCPY(argv, RARRAY(args)->ptr, VALUE, argc);\ - }\ -} while (0) - -#define SETUP_ARGS(anode) SETUP_ARGS0(anode,0) - -#define BEGIN_CALLARGS do {\ - struct BLOCK *tmp_block = ruby_block;\ - int tmp_iter = ruby_iter->iter;\ - switch (tmp_iter) {\ - case ITER_PRE:\ - if (ruby_block) ruby_block = ruby_block->outer;\ - case ITER_PAS:\ - tmp_iter = ITER_NOT;\ - }\ - PUSH_ITER(tmp_iter) - -#define END_CALLARGS \ - ruby_block = tmp_block;\ - POP_ITER();\ -} while (0) - -#define MATCH_DATA *rb_svar(node->nd_cnt) - -static char* is_defined _((VALUE, NODE*, char*)); - -static char* -arg_defined(self, node, buf, type) - VALUE self; - NODE *node; - char *buf; - char *type; -{ - int argc; - int i; - - if (!node) return type; /* no args */ - if (nd_type(node) == NODE_ARRAY) { - argc=node->nd_alen; - if (argc > 0) { - for (i=0;i<argc;i++) { - if (!is_defined(self, node->nd_head, buf)) - return 0; - node = node->nd_next; - } - } - } - else if (!is_defined(self, node, buf)) { - return 0; - } - return type; -} - -static char* -is_defined(self, node, buf) - VALUE self; - NODE *node; /* OK */ - char *buf; -{ - VALUE val; /* OK */ - int state; - - again: - if (!node) return "expression"; - switch (nd_type(node)) { - case NODE_SUPER: - case NODE_ZSUPER: - if (ruby_frame->last_func == 0) return 0; - else if (ruby_frame->last_class == 0) return 0; - val = ruby_frame->last_class; - if (rb_method_boundp(RCLASS(val)->super, ruby_frame->orig_func, 0)) { - if (nd_type(node) == NODE_SUPER) { - return arg_defined(self, node->nd_args, buf, "super"); - } - return "super"; - } - break; - - case NODE_VCALL: - case NODE_FCALL: - val = self; - goto check_bound; - - case NODE_ATTRASGN: - val = self; - if (node->nd_recv == (NODE *)1) goto check_bound; - case NODE_CALL: - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - val = rb_eval(self, node->nd_recv); - } - POP_TAG(); - if (state) { - ruby_errinfo = Qnil; - return 0; - } - check_bound: - { - int call = nd_type(node)==NODE_CALL; - - val = CLASS_OF(val); - if (call) { - int noex; - ID id = node->nd_mid; - - if (!rb_get_method_body(&val, &id, &noex)) - break; - if ((noex & NOEX_PRIVATE)) - break; - if ((noex & NOEX_PROTECTED) && - !rb_obj_is_kind_of(self, rb_class_real(val))) - break; - } - else if (!rb_method_boundp(val, node->nd_mid, call)) - break; - return arg_defined(self, node->nd_args, buf, - nd_type(node) == NODE_ATTRASGN ? - "assignment" : "method"); - } - break; - - case NODE_MATCH2: - case NODE_MATCH3: - return "method"; - - case NODE_YIELD: - if (rb_block_given_p()) { - return "yield"; - } - break; - - case NODE_SELF: - return "self"; - - case NODE_NIL: - return "nil"; - - case NODE_TRUE: - return "true"; - - case NODE_FALSE: - return "false"; - - case NODE_ATTRSET: - case NODE_OP_ASGN1: - case NODE_OP_ASGN2: - case NODE_OP_ASGN_OR: - case NODE_OP_ASGN_AND: - case NODE_MASGN: - case NODE_LASGN: - case NODE_DASGN: - case NODE_DASGN_CURR: - case NODE_GASGN: - case NODE_IASGN: - case NODE_CDECL: - case NODE_CVDECL: - case NODE_CVASGN: - return "assignment"; - - case NODE_LVAR: - return "local-variable"; - case NODE_DVAR: - return "local-variable(in-block)"; - - case NODE_GVAR: - if (rb_gvar_defined(node->nd_entry)) { - return "global-variable"; - } - break; - - case NODE_IVAR: - if (rb_ivar_defined(self, node->nd_vid)) { - return "instance-variable"; - } - break; - - case NODE_CONST: - if (ev_const_defined(ruby_cref, node->nd_vid, self)) { - return "constant"; - } - break; - - case NODE_CVAR: - if (rb_cvar_defined(cvar_cbase(), node->nd_vid)) { - return "class variable"; - } - break; - - case NODE_COLON2: - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - val = rb_eval(self, node->nd_head); - } - POP_TAG(); - if (state) { - ruby_errinfo = Qnil; - return 0; - } - else { - switch (TYPE(val)) { - case T_CLASS: - case T_MODULE: - if (rb_const_defined_from(val, node->nd_mid)) - return "constant"; - break; - default: - if (rb_method_boundp(CLASS_OF(val), node->nd_mid, 1)) { - return "method"; - } - } - } - break; - - case NODE_COLON3: - if (rb_const_defined_from(rb_cObject, node->nd_mid)) { - return "constant"; - } - break; - - case NODE_NTH_REF: - if (RTEST(rb_reg_nth_defined(node->nd_nth, MATCH_DATA))) { - sprintf(buf, "$%d", (int)node->nd_nth); - return buf; - } - break; - - case NODE_BACK_REF: - if (RTEST(rb_reg_nth_defined(0, MATCH_DATA))) { - sprintf(buf, "$%c", (char)node->nd_nth); - return buf; - } - break; - - case NODE_NEWLINE: - node = node->nd_next; - goto again; - - default: - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - rb_eval(self, node); - } - POP_TAG(); - if (!state) { - return "expression"; - } - ruby_errinfo = Qnil; - break; - } - return 0; -} - -static int handle_rescue _((VALUE,NODE*)); - -static void blk_free(); - -static VALUE -rb_obj_is_proc(proc) - VALUE proc; -{ - if (TYPE(proc) == T_DATA && RDATA(proc)->dfree == (RUBY_DATA_FUNC)blk_free) { - return Qtrue; - } - return Qfalse; -} - -void -rb_add_event_hook(func, events) - rb_event_hook_func_t func; - rb_event_t events; -{ - rb_event_hook_t *hook; - - hook = ALLOC(rb_event_hook_t); - hook->func = func; - hook->events = events; - hook->next = event_hooks; - event_hooks = hook; -} - -int -rb_remove_event_hook(func) - rb_event_hook_func_t func; -{ - rb_event_hook_t *prev, *hook; - - prev = NULL; - hook = event_hooks; - while (hook) { - if (hook->func == func) { - if (prev) { - prev->next = hook->next; - } - else { - event_hooks = hook->next; - } - xfree(hook); - return 0; - } - prev = hook; - hook = hook->next; - } - return -1; -} - -/* - * call-seq: - * set_trace_func(proc) => proc - * set_trace_func(nil) => nil - * - * Establishes _proc_ as the handler for tracing, or disables - * tracing if the parameter is +nil+. _proc_ takes up - * to six parameters: an event name, a filename, a line number, an - * object id, a binding, and the name of a class. _proc_ is - * invoked whenever an event occurs. Events are: <code>c-call</code> - * (call a C-language routine), <code>c-return</code> (return from a - * C-language routine), <code>call</code> (call a Ruby method), - * <code>class</code> (start a class or module definition), - * <code>end</code> (finish a class or module definition), - * <code>line</code> (execute code on a new line), <code>raise</code> - * (raise an exception), and <code>return</code> (return from a Ruby - * method). Tracing is disabled within the context of _proc_. - * - * class Test - * def test - * a = 1 - * b = 2 - * end - * end - * - * set_trace_func proc { |event, file, line, id, binding, classname| - * printf "%8s %s:%-2d %10s %8s\n", event, file, line, id, classname - * } - * t = Test.new - * t.test - * - * line prog.rb:11 false - * c-call prog.rb:11 new Class - * c-call prog.rb:11 initialize Object - * c-return prog.rb:11 initialize Object - * c-return prog.rb:11 new Class - * line prog.rb:12 false - * call prog.rb:2 test Test - * line prog.rb:3 test Test - * line prog.rb:4 test Test - * return prog.rb:4 test Test - */ - - -static VALUE -set_trace_func(obj, trace) - VALUE obj, trace; -{ - rb_event_hook_t *hook; - - rb_secure(4); - if (NIL_P(trace)) { - trace_func = 0; - rb_remove_event_hook(call_trace_func); - return Qnil; - } - if (!rb_obj_is_proc(trace)) { - rb_raise(rb_eTypeError, "trace_func needs to be Proc"); - } - trace_func = trace; - for (hook = event_hooks; hook; hook = hook->next) { - if (hook->func == call_trace_func) - return trace; - } - rb_add_event_hook(call_trace_func, RUBY_EVENT_ALL); - return trace; -} - -static char * -get_event_name(rb_event_t event) -{ - switch (event) { - case RUBY_EVENT_LINE: - return "line"; - case RUBY_EVENT_CLASS: - return "class"; - case RUBY_EVENT_END: - return "end"; - case RUBY_EVENT_CALL: - return "call"; - case RUBY_EVENT_RETURN: - return "return"; - case RUBY_EVENT_C_CALL: - return "c-call"; - case RUBY_EVENT_C_RETURN: - return "c-return"; - case RUBY_EVENT_RAISE: - return "raise"; - default: - return "unknown"; - } -} - -static void -call_trace_func(event, node, self, id, klass) - rb_event_t event; - NODE *node; - VALUE self; - ID id; - VALUE klass; /* OK */ -{ - int state, raised; - struct FRAME *prev; - NODE *node_save; - VALUE srcfile; - char *event_name; - rb_thread_t th = curr_thread; - - if (!trace_func) return; - if (tracing) return; - if (ruby_in_compile) return; - if (id == ID_ALLOCATOR) return; - - if (!(node_save = ruby_current_node)) { - node_save = NEW_NEWLINE(0); - } - tracing = 1; - prev = ruby_frame; - PUSH_FRAME(); - *ruby_frame = *prev; - ruby_frame->prev = prev; - ruby_frame->iter = 0; /* blocks not available anyway */ - - if (node) { - ruby_current_node = node; - ruby_frame->node = node; - ruby_sourcefile = node->nd_file; - ruby_sourceline = nd_line(node); - } - if (klass) { - if (TYPE(klass) == T_ICLASS) { - klass = RBASIC(klass)->klass; - } - else if (FL_TEST(klass, FL_SINGLETON)) { - klass = rb_iv_get(klass, "__attached__"); - } - } - PUSH_TAG(PROT_NONE); - raised = rb_thread_reset_raised(th); - if ((state = EXEC_TAG()) == 0) { - srcfile = rb_str_new2(ruby_sourcefile?ruby_sourcefile:"(ruby)"); - event_name = get_event_name(event); - proc_invoke(trace_func, rb_ary_new3(6, rb_str_new2(event_name), - srcfile, - INT2FIX(ruby_sourceline), - id?ID2SYM(id):Qnil, - self?rb_f_binding(self):Qnil, - klass), - Qundef, 0); - } - if (raised) rb_thread_set_raised(th); - POP_TAG(); - POP_FRAME(); - - tracing = 0; - ruby_current_node = node_save; - SET_CURRENT_SOURCE(); - if (state) JUMP_TAG(state); -} - -static VALUE -avalue_to_svalue(v) - VALUE v; -{ - VALUE tmp, top; - - tmp = rb_check_array_type(v); - if (NIL_P(tmp)) { - return v; - } - if (RARRAY(tmp)->len == 0) { - return Qundef; - } - if (RARRAY(tmp)->len == 1) { - top = rb_check_array_type(RARRAY(tmp)->ptr[0]); - if (NIL_P(top)) { - return RARRAY(tmp)->ptr[0]; - } - if (RARRAY(top)->len > 1) { - return v; - } - return top; - } - return tmp; -} - -static VALUE -svalue_to_avalue(v) - VALUE v; -{ - VALUE tmp, top; - - if (v == Qundef) return rb_ary_new2(0); - tmp = rb_check_array_type(v); - if (NIL_P(tmp)) { - return rb_ary_new3(1, v); - } - if (RARRAY(tmp)->len == 1) { - top = rb_check_array_type(RARRAY(tmp)->ptr[0]); - if (!NIL_P(top) && RARRAY(top)->len > 1) { - return tmp; - } - return rb_ary_new3(1, v); - } - return tmp; -} - -static VALUE -svalue_to_mrhs(v, lhs) - VALUE v; - NODE *lhs; -{ - VALUE tmp; - - if (v == Qundef) return rb_ary_new2(0); - tmp = rb_check_array_type(v); - if (NIL_P(tmp)) { - return rb_ary_new3(1, v); - } - /* no lhs means splat lhs only */ - if (!lhs) { - return rb_ary_new3(1, v); - } - return tmp; -} - -static VALUE -avalue_splat(v) - VALUE v; -{ - if (RARRAY(v)->len == 0) { - return Qundef; - } - if (RARRAY(v)->len == 1) { - return RARRAY(v)->ptr[0]; - } - return v; -} - -#if 1 -VALUE -rb_Array(val) - VALUE val; -{ - VALUE tmp = rb_check_array_type(val); - - if (NIL_P(tmp)) { - /* hack to avoid invoke Object#to_a */ - VALUE origin; - ID id = rb_intern("to_a"); - - if (search_method(CLASS_OF(val), id, &origin) && - RCLASS(origin)->m_tbl != RCLASS(rb_mKernel)->m_tbl) { /* exclude Kernel#to_a */ - val = rb_funcall(val, id, 0); - if (TYPE(val) != T_ARRAY) { - rb_raise(rb_eTypeError, "`to_a' did not return Array"); - } - return val; - } - else { - return rb_ary_new3(1, val); - } - } - return tmp; -} -#endif - -static VALUE -splat_value(v) - VALUE v; -{ - if (NIL_P(v)) return rb_ary_new3(1, Qnil); - return rb_Array(v); -} - -static VALUE -class_prefix(self, cpath) - VALUE self; - NODE *cpath; -{ - if (!cpath) { - rb_bug("class path missing"); - } - if (cpath->nd_head) { - VALUE c = rb_eval(self, cpath->nd_head); - switch (TYPE(c)) { - case T_CLASS: - case T_MODULE: - break; - default: - rb_raise(rb_eTypeError, "%s is not a class/module", - RSTRING(rb_obj_as_string(c))->ptr); - } - return c; - } - else if (nd_type(cpath) == NODE_COLON2) { - return ruby_cbase; - } - else if (ruby_wrapper) { - return ruby_wrapper; - } - else { - return rb_cObject; - } -} - -#define return_value(v) do {\ - if ((prot_tag->retval = (v)) == Qundef) {\ - prot_tag->retval = Qnil;\ - }\ -} while (0) - -NORETURN(static void return_jump _((VALUE))); -NORETURN(static void break_jump _((VALUE))); -NORETURN(static void next_jump _((VALUE))); -NORETURN(static void unknown_node _((NODE * volatile))); - -static void -unknown_node(node) - NODE *volatile node; -{ - ruby_current_node = 0; - if (node->flags == 0) { - rb_bug("terminated node (0x%lx)", node); - } - else if (BUILTIN_TYPE(node) != T_NODE) { - rb_bug("not a node 0x%02lx (0x%lx)", BUILTIN_TYPE(node), node); - } - else { - rb_bug("unknown node type %d (0x%lx)", nd_type(node), node); - } -} - -static VALUE -rb_eval(self, n) - VALUE self; - NODE *n; -{ - NODE * volatile contnode = 0; - NODE * volatile node = n; - int state; - volatile VALUE result = Qnil; - st_data_t data; - -#define RETURN(v) do { \ - result = (v); \ - goto finish; \ -} while (0) - - again: - if (!node) RETURN(Qnil); - - ruby_current_node = node; - switch (nd_type(node)) { - case NODE_BLOCK: - if (contnode) { - result = rb_eval(self, node); - break; - } - contnode = node->nd_next; - node = node->nd_head; - goto again; - - case NODE_POSTEXE: - rb_f_END(); - nd_set_type(node, NODE_NIL); /* exec just once */ - result = Qnil; - break; - - /* begin .. end without clauses */ - case NODE_BEGIN: - node = node->nd_body; - goto again; - - /* nodes for speed-up(default match) */ - case NODE_MATCH: - result = rb_reg_match2(node->nd_lit); - break; - - /* nodes for speed-up(literal match) */ - case NODE_MATCH2: - { - VALUE l = rb_eval(self,node->nd_recv); - VALUE r = rb_eval(self,node->nd_value); - result = rb_reg_match(l, r); - } - break; - - /* nodes for speed-up(literal match) */ - case NODE_MATCH3: - { - VALUE r = rb_eval(self,node->nd_recv); - VALUE l = rb_eval(self,node->nd_value); - if (TYPE(l) == T_STRING) { - result = rb_reg_match(r, l); - } - else { - result = rb_funcall(l, match, 1, r); - } - } - break; - - /* node for speed-up(top-level loop for -n/-p) */ - case NODE_OPT_N: - PUSH_TAG(PROT_LOOP); - switch (state = EXEC_TAG()) { - case 0: - opt_n_next: - while (!NIL_P(rb_gets())) { - opt_n_redo: - rb_eval(self, node->nd_body); - } - break; - - case TAG_REDO: - state = 0; - goto opt_n_redo; - case TAG_NEXT: - state = 0; - goto opt_n_next; - case TAG_BREAK: - state = 0; - default: - break; - } - POP_TAG(); - if (state) JUMP_TAG(state); - RETURN(Qnil); - - case NODE_SELF: - RETURN(self); - - case NODE_NIL: - RETURN(Qnil); - - case NODE_TRUE: - RETURN(Qtrue); - - case NODE_FALSE: - RETURN(Qfalse); - - case NODE_IF: - EXEC_EVENT_HOOK(RUBY_EVENT_LINE, node, self, - ruby_frame->last_func, - ruby_frame->last_class); - if (RTEST(rb_eval(self, node->nd_cond))) { - node = node->nd_body; - } - else { - node = node->nd_else; - } - goto again; - - case NODE_WHEN: - while (node) { - NODE *tag; - - if (nd_type(node) != NODE_WHEN) goto again; - tag = node->nd_head; - while (tag) { - EXEC_EVENT_HOOK(RUBY_EVENT_LINE, tag, self, - ruby_frame->last_func, - ruby_frame->last_class); - if (tag->nd_head && nd_type(tag->nd_head) == NODE_WHEN) { - VALUE v = rb_eval(self, tag->nd_head->nd_head); - long i; - - if (TYPE(v) != T_ARRAY) v = rb_ary_to_ary(v); - for (i=0; i<RARRAY(v)->len; i++) { - if (RTEST(RARRAY(v)->ptr[i])) { - node = node->nd_body; - goto again; - } - } - tag = tag->nd_next; - continue; - } - if (RTEST(rb_eval(self, tag->nd_head))) { - node = node->nd_body; - goto again; - } - tag = tag->nd_next; - } - node = node->nd_next; - } - RETURN(Qnil); - - case NODE_CASE: - { - VALUE val; - - val = rb_eval(self, node->nd_head); - node = node->nd_body; - while (node) { - NODE *tag; - - if (nd_type(node) != NODE_WHEN) { - goto again; - } - tag = node->nd_head; - while (tag) { - EXEC_EVENT_HOOK(RUBY_EVENT_LINE, tag, self, - ruby_frame->last_func, - ruby_frame->last_class); - if (tag->nd_head && nd_type(tag->nd_head) == NODE_WHEN) { - VALUE v = rb_eval(self, tag->nd_head->nd_head); - long i; - - if (TYPE(v) != T_ARRAY) v = rb_ary_to_ary(v); - for (i=0; i<RARRAY(v)->len; i++) { - if (RTEST(rb_funcall2(RARRAY(v)->ptr[i], eqq, 1, &val))){ - node = node->nd_body; - goto again; - } - } - tag = tag->nd_next; - continue; - } - if (RTEST(rb_funcall2(rb_eval(self, tag->nd_head), eqq, 1, &val))) { - node = node->nd_body; - goto again; - } - tag = tag->nd_next; - } - node = node->nd_next; - } - } - RETURN(Qnil); - - case NODE_WHILE: - PUSH_TAG(PROT_LOOP); - result = Qnil; - switch (state = EXEC_TAG()) { - case 0: - if (node->nd_state && !RTEST(rb_eval(self, node->nd_cond))) - goto while_out; - do { - while_redo: - rb_eval(self, node->nd_body); - while_next: - ; - } while (RTEST(rb_eval(self, node->nd_cond))); - break; - - case TAG_REDO: - state = 0; - goto while_redo; - case TAG_NEXT: - state = 0; - goto while_next; - case TAG_BREAK: - if (TAG_DST()) { - state = 0; - result = prot_tag->retval; - } - /* fall through */ - default: - break; - } - while_out: - POP_TAG(); - if (state) JUMP_TAG(state); - RETURN(result); - - case NODE_UNTIL: - PUSH_TAG(PROT_LOOP); - result = Qnil; - switch (state = EXEC_TAG()) { - case 0: - if (node->nd_state && RTEST(rb_eval(self, node->nd_cond))) - goto until_out; - do { - until_redo: - rb_eval(self, node->nd_body); - until_next: - ; - } while (!RTEST(rb_eval(self, node->nd_cond))); - break; - - case TAG_REDO: - state = 0; - goto until_redo; - case TAG_NEXT: - state = 0; - goto until_next; - case TAG_BREAK: - if (TAG_DST()) { - state = 0; - result = prot_tag->retval; - } - /* fall through */ - default: - break; - } - until_out: - POP_TAG(); - if (state) JUMP_TAG(state); - RETURN(result); - - case NODE_BLOCK_PASS: - result = block_pass(self, node); - break; - - case NODE_ITER: - case NODE_FOR: - { - PUSH_TAG(PROT_LOOP); - PUSH_BLOCK(node->nd_var, node->nd_body); - - state = EXEC_TAG(); - if (state == 0) { - iter_retry: - PUSH_ITER(ITER_PRE); - if (nd_type(node) == NODE_ITER) { - result = rb_eval(self, node->nd_iter); - } - else { - VALUE recv; - - _block.flags &= ~BLOCK_D_SCOPE; - BEGIN_CALLARGS; - recv = rb_eval(self, node->nd_iter); - END_CALLARGS; - ruby_current_node = node; - SET_CURRENT_SOURCE(); - result = rb_call(CLASS_OF(recv),recv,each,0,0,0,self); - } - POP_ITER(); - } - else if (state == TAG_BREAK && TAG_DST()) { - result = prot_tag->retval; - state = 0; - } - else if (state == TAG_RETRY) { - state = 0; - goto iter_retry; - } - POP_BLOCK(); - POP_TAG(); - switch (state) { - case 0: - break; - default: - JUMP_TAG(state); - } - } - break; - - case NODE_BREAK: - break_jump(rb_eval(self, node->nd_stts)); - break; - - case NODE_NEXT: - CHECK_INTS; - next_jump(rb_eval(self, node->nd_stts)); - break; - - case NODE_REDO: - CHECK_INTS; - JUMP_TAG(TAG_REDO); - break; - - case NODE_RETRY: - CHECK_INTS; - JUMP_TAG(TAG_RETRY); - break; - - case NODE_SPLAT: - result = splat_value(rb_eval(self, node->nd_head)); - break; - - case NODE_TO_ARY: - result = rb_ary_to_ary(rb_eval(self, node->nd_head)); - break; - - case NODE_SVALUE: - result = avalue_splat(rb_eval(self, node->nd_head)); - if (result == Qundef) result = Qnil; - break; - - case NODE_YIELD: - if (node->nd_head) { - result = rb_eval(self, node->nd_head); - ruby_current_node = node; - } - else { - result = Qundef; /* no arg */ - } - SET_CURRENT_SOURCE(); - result = rb_yield_0(result, 0, 0, 0, node->nd_state); - break; - - case NODE_RESCUE: - { - volatile VALUE e_info = ruby_errinfo; - volatile int rescuing = 0; - - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - retry_entry: - result = rb_eval(self, node->nd_head); - } - else if (rescuing) { - if (rescuing < 0) { - /* in rescue argument, just reraise */ - } - else if (state == TAG_RETRY) { - rescuing = state = 0; - ruby_errinfo = e_info; - goto retry_entry; - } - else if (state != TAG_RAISE) { - result = prot_tag->retval; - } - } - else if (state == TAG_RAISE) { - NODE *resq = node->nd_resq; - - rescuing = -1; - while (resq) { - ruby_current_node = resq; - if (handle_rescue(self, resq)) { - state = 0; - rescuing = 1; - result = rb_eval(self, resq->nd_body); - break; - } - resq = resq->nd_head; /* next rescue */ - } - } - else { - result = prot_tag->retval; - } - POP_TAG(); - if (state != TAG_RAISE) ruby_errinfo = e_info; - if (state) { - JUMP_TAG(state); - } - /* no exception raised */ - if (!rescuing && (node = node->nd_else)) { /* else clause given */ - goto again; - } - } - break; - - case NODE_ENSURE: - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - result = rb_eval(self, node->nd_head); - } - POP_TAG(); - if (node->nd_ensr && !thread_no_ensure()) { - VALUE retval = prot_tag->retval; /* save retval */ - VALUE errinfo = ruby_errinfo; - - rb_eval(self, node->nd_ensr); - return_value(retval); - ruby_errinfo = errinfo; - } - if (state) JUMP_TAG(state); - break; - - case NODE_AND: - result = rb_eval(self, node->nd_1st); - if (!RTEST(result)) break; - node = node->nd_2nd; - goto again; - - case NODE_OR: - result = rb_eval(self, node->nd_1st); - if (RTEST(result)) break; - node = node->nd_2nd; - goto again; - - case NODE_NOT: - if (RTEST(rb_eval(self, node->nd_body))) result = Qfalse; - else result = Qtrue; - break; - - case NODE_DOT2: - case NODE_DOT3: - { - VALUE beg = rb_eval(self, node->nd_beg); - VALUE end = rb_eval(self, node->nd_end); - result = rb_range_new(beg, end, nd_type(node) == NODE_DOT3); - } - break; - - case NODE_FLIP2: /* like AWK */ - { - VALUE *flip = rb_svar(node->nd_cnt); - if (!flip) rb_bug("unexpected local variable"); - if (!RTEST(*flip)) { - if (RTEST(rb_eval(self, node->nd_beg))) { - *flip = RTEST(rb_eval(self, node->nd_end))?Qfalse:Qtrue; - result = Qtrue; - } - else { - result = Qfalse; - } - } - else { - if (RTEST(rb_eval(self, node->nd_end))) { - *flip = Qfalse; - } - result = Qtrue; - } - } - break; - - case NODE_FLIP3: /* like SED */ - { - VALUE *flip = rb_svar(node->nd_cnt); - if (!flip) rb_bug("unexpected local variable"); - if (!RTEST(*flip)) { - result = RTEST(rb_eval(self, node->nd_beg)) ? Qtrue : Qfalse; - *flip = result; - } - else { - if (RTEST(rb_eval(self, node->nd_end))) { - *flip = Qfalse; - } - result = Qtrue; - } - } - break; - - case NODE_RETURN: - return_jump(rb_eval(self, node->nd_stts)); - break; - - case NODE_ARGSCAT: - { - VALUE args = rb_eval(self, node->nd_head); - result = rb_ary_concat(args, splat_value(rb_eval(self, node->nd_body))); - } - break; - - case NODE_ARGSPUSH: - { - VALUE args = rb_ary_dup(rb_eval(self, node->nd_head)); - result = rb_ary_push(args, rb_eval(self, node->nd_body)); - } - break; - - case NODE_ATTRASGN: - { - VALUE recv; - int argc; VALUE *argv; /* used in SETUP_ARGS */ - int scope; - TMP_PROTECT; - - BEGIN_CALLARGS; - if (node->nd_recv == (NODE *)1) { - recv = self; - scope = 1; - } - else { - recv = rb_eval(self, node->nd_recv); - scope = 0; - } - SETUP_ARGS(node->nd_args); - END_CALLARGS; - - ruby_current_node = node; - SET_CURRENT_SOURCE(); - rb_call(CLASS_OF(recv),recv,node->nd_mid,argc,argv,scope,self); - result = argv[argc-1]; - } - break; - - case NODE_CALL: - { - VALUE recv; - int argc; VALUE *argv; /* used in SETUP_ARGS */ - TMP_PROTECT; - - BEGIN_CALLARGS; - recv = rb_eval(self, node->nd_recv); - SETUP_ARGS(node->nd_args); - END_CALLARGS; - - ruby_current_node = node; - SET_CURRENT_SOURCE(); - result = rb_call(CLASS_OF(recv),recv,node->nd_mid,argc,argv,0,self); - } - break; - - case NODE_FCALL: - { - int argc; VALUE *argv; /* used in SETUP_ARGS */ - TMP_PROTECT; - - BEGIN_CALLARGS; - SETUP_ARGS(node->nd_args); - END_CALLARGS; - - ruby_current_node = node; - SET_CURRENT_SOURCE(); - result = rb_call(CLASS_OF(self),self,node->nd_mid,argc,argv,1,self); - } - break; - - case NODE_VCALL: - SET_CURRENT_SOURCE(); - result = rb_call(CLASS_OF(self),self,node->nd_mid,0,0,2,self); - break; - - case NODE_SUPER: - case NODE_ZSUPER: - { - int argc; VALUE *argv; /* used in SETUP_ARGS */ - TMP_PROTECT; - - if (ruby_frame->last_class == 0) { - if (ruby_frame->last_func) { - rb_name_error(ruby_frame->last_func, - "superclass method `%s' disabled", - rb_id2name(ruby_frame->orig_func)); - } - else { - rb_raise(rb_eNoMethodError, "super called outside of method"); - } - } - if (nd_type(node) == NODE_ZSUPER) { - argc = ruby_frame->argc; - if (argc && DMETHOD_P()) { - if (TYPE(RBASIC(ruby_scope)->klass) != T_ARRAY || - RARRAY(RBASIC(ruby_scope)->klass)->len != argc) { - rb_raise(rb_eRuntimeError, - "super: specify arguments explicitly"); - } - argv = RARRAY(RBASIC(ruby_scope)->klass)->ptr; - } - else if (!ruby_scope->local_vars) { - argc = 0; - argv = 0; - } - else { - argv = ruby_scope->local_vars + 2; - } - } - else { - BEGIN_CALLARGS; - SETUP_ARGS(node->nd_args); - END_CALLARGS; - ruby_current_node = node; - } - - SET_CURRENT_SOURCE(); - result = rb_call_super(argc, argv); - } - break; - - case NODE_SCOPE: - { - struct FRAME frame; - NODE *saved_cref = 0; - - frame = *ruby_frame; - frame.tmp = ruby_frame; - ruby_frame = &frame; - - PUSH_SCOPE(); - PUSH_TAG(PROT_NONE); - if (node->nd_rval) { - saved_cref = ruby_cref; - ruby_cref = (NODE*)node->nd_rval; - } - if (node->nd_tbl) { - VALUE *vars = ALLOCA_N(VALUE, node->nd_tbl[0]+1); - *vars++ = (VALUE)node; - ruby_scope->local_vars = vars; - rb_mem_clear(ruby_scope->local_vars, node->nd_tbl[0]); - ruby_scope->local_tbl = node->nd_tbl; - } - else { - ruby_scope->local_vars = 0; - ruby_scope->local_tbl = 0; - } - if ((state = EXEC_TAG()) == 0) { - result = rb_eval(self, node->nd_next); - } - POP_TAG(); - POP_SCOPE(); - ruby_frame = frame.tmp; - if (saved_cref) - ruby_cref = saved_cref; - if (state) JUMP_TAG(state); - } - break; - - case NODE_OP_ASGN1: - { - int argc; VALUE *argv; /* used in SETUP_ARGS */ - VALUE recv, val, tmp; - NODE *rval; - TMP_PROTECT; - - recv = rb_eval(self, node->nd_recv); - rval = node->nd_args->nd_head; - SETUP_ARGS0(node->nd_args->nd_body, 1); - val = rb_funcall3(recv, aref, argc, argv); - switch (node->nd_mid) { - case 0: /* OR */ - if (RTEST(val)) RETURN(val); - val = rb_eval(self, rval); - break; - case 1: /* AND */ - if (!RTEST(val)) RETURN(val); - val = rb_eval(self, rval); - break; - default: - tmp = rb_eval(self, rval); - val = rb_funcall3(val, node->nd_mid, 1, &tmp); - } - argv[argc] = val; - rb_funcall2(recv, aset, argc+1, argv); - result = val; - } - break; - - case NODE_OP_ASGN2: - { - ID id = node->nd_next->nd_vid; - VALUE recv, val, tmp; - - recv = rb_eval(self, node->nd_recv); - val = rb_funcall3(recv, id, 0, 0); - switch (node->nd_next->nd_mid) { - case 0: /* OR */ - if (RTEST(val)) RETURN(val); - val = rb_eval(self, node->nd_value); - break; - case 1: /* AND */ - if (!RTEST(val)) RETURN(val); - val = rb_eval(self, node->nd_value); - break; - default: - tmp = rb_eval(self, node->nd_value); - val = rb_funcall3(val, node->nd_next->nd_mid, 1, &tmp); - } - - rb_funcall2(recv, node->nd_next->nd_aid, 1, &val); - result = val; - } - break; - - case NODE_OP_ASGN_AND: - result = rb_eval(self, node->nd_head); - if (!RTEST(result)) break; - node = node->nd_value; - goto again; - - case NODE_OP_ASGN_OR: - if ((node->nd_aid && !is_defined(self, node->nd_head, 0)) || - !RTEST(result = rb_eval(self, node->nd_head))) { - node = node->nd_value; - goto again; - } - break; - - case NODE_MASGN: - result = massign(self, node, rb_eval(self, node->nd_value), 0); - break; - - case NODE_LASGN: - if (ruby_scope->local_vars == 0) - rb_bug("unexpected local variable assignment"); - result = rb_eval(self, node->nd_value); - ruby_scope->local_vars[node->nd_cnt] = result; - break; - - case NODE_DASGN: - result = rb_eval(self, node->nd_value); - dvar_asgn(node->nd_vid, result); - break; - - case NODE_DASGN_CURR: - result = rb_eval(self, node->nd_value); - dvar_asgn_curr(node->nd_vid, result); - break; - - case NODE_GASGN: - result = rb_eval(self, node->nd_value); - rb_gvar_set(node->nd_entry, result); - break; - - case NODE_IASGN: - result = rb_eval(self, node->nd_value); - rb_ivar_set(self, node->nd_vid, result); - break; - - case NODE_CDECL: - result = rb_eval(self, node->nd_value); - if (node->nd_vid == 0) { - rb_const_set(class_prefix(self, node->nd_else), node->nd_else->nd_mid, result); - } - else { - rb_const_set(ruby_cbase, node->nd_vid, result); - } - break; - - case NODE_CVDECL: - if (NIL_P(ruby_cbase)) { - rb_raise(rb_eTypeError, "no class/module to define class variable"); - } - result = rb_eval(self, node->nd_value); - rb_cvar_set(cvar_cbase(), node->nd_vid, result, Qtrue); - break; - - case NODE_CVASGN: - result = rb_eval(self, node->nd_value); - rb_cvar_set(cvar_cbase(), node->nd_vid, result, Qfalse); - break; - - case NODE_LVAR: - if (ruby_scope->local_vars == 0) { - rb_bug("unexpected local variable"); - } - result = ruby_scope->local_vars[node->nd_cnt]; - break; - - case NODE_DVAR: - result = rb_dvar_ref(node->nd_vid); - break; - - case NODE_GVAR: - result = rb_gvar_get(node->nd_entry); - break; - - case NODE_IVAR: - result = rb_ivar_get(self, node->nd_vid); - break; - - case NODE_CONST: - result = ev_const_get(ruby_cref, node->nd_vid, self); - break; - - case NODE_CVAR: - result = rb_cvar_get(cvar_cbase(), node->nd_vid); - break; - - case NODE_BLOCK_ARG: - if (ruby_scope->local_vars == 0) - rb_bug("unexpected block argument"); - if (rb_block_given_p()) { - result = rb_block_proc(); - ruby_scope->local_vars[node->nd_cnt] = result; - } - else { - result = Qnil; - } - break; - - case NODE_COLON2: - { - VALUE klass; - - klass = rb_eval(self, node->nd_head); - if (rb_is_const_id(node->nd_mid)) { - switch (TYPE(klass)) { - case T_CLASS: - case T_MODULE: - result = rb_const_get_from(klass, node->nd_mid); - break; - default: - rb_raise(rb_eTypeError, "%s is not a class/module", - RSTRING(rb_obj_as_string(klass))->ptr); - break; - } - } - else { - result = rb_funcall(klass, node->nd_mid, 0, 0); - } - } - break; - - case NODE_COLON3: - result = rb_const_get_from(rb_cObject, node->nd_mid); - break; - - case NODE_NTH_REF: - result = rb_reg_nth_match(node->nd_nth, MATCH_DATA); - break; - - case NODE_BACK_REF: - switch (node->nd_nth) { - case '&': - result = rb_reg_last_match(MATCH_DATA); - break; - case '`': - result = rb_reg_match_pre(MATCH_DATA); - break; - case '\'': - result = rb_reg_match_post(MATCH_DATA); - break; - case '+': - result = rb_reg_match_last(MATCH_DATA); - break; - default: - rb_bug("unexpected back-ref"); - } - break; - - case NODE_HASH: - { - NODE *list; - VALUE hash = rb_hash_new(); - VALUE key, val; - - list = node->nd_head; - while (list) { - key = rb_eval(self, list->nd_head); - list = list->nd_next; - if (list == 0) - rb_bug("odd number list for Hash"); - val = rb_eval(self, list->nd_head); - list = list->nd_next; - rb_hash_aset(hash, key, val); - } - result = hash; - } - break; - - case NODE_ZARRAY: /* zero length list */ - result = rb_ary_new(); - break; - - case NODE_ARRAY: - { - VALUE ary; - long i; - - i = node->nd_alen; - ary = rb_ary_new2(i); - for (i=0;node;node=node->nd_next) { - RARRAY(ary)->ptr[i++] = rb_eval(self, node->nd_head); - RARRAY(ary)->len = i; - } - - result = ary; - } - break; - - case NODE_STR: - result = rb_str_new3(node->nd_lit); - break; - - case NODE_EVSTR: - result = rb_obj_as_string(rb_eval(self, node->nd_body)); - break; - - case NODE_DSTR: - case NODE_DXSTR: - case NODE_DREGX: - case NODE_DREGX_ONCE: - case NODE_DSYM: - { - VALUE str, str2; - NODE *list = node->nd_next; - - str = rb_str_new3(node->nd_lit); - while (list) { - if (list->nd_head) { - switch (nd_type(list->nd_head)) { - case NODE_STR: - str2 = list->nd_head->nd_lit; - break; - default: - str2 = rb_eval(self, list->nd_head); - break; - } - rb_str_append(str, str2); - OBJ_INFECT(str, str2); - } - list = list->nd_next; - } - switch (nd_type(node)) { - case NODE_DREGX: - result = rb_reg_new(RSTRING(str)->ptr, RSTRING(str)->len, - node->nd_cflag); - break; - case NODE_DREGX_ONCE: /* regexp expand once */ - result = rb_reg_new(RSTRING(str)->ptr, RSTRING(str)->len, - node->nd_cflag); - nd_set_type(node, NODE_LIT); - node->nd_lit = result; - break; - case NODE_LIT: - /* other thread may replace NODE_DREGX_ONCE to NODE_LIT */ - goto again; - case NODE_DXSTR: - result = rb_funcall(self, '`', 1, str); - break; - case NODE_DSYM: - result = rb_str_intern(str); - break; - default: - result = str; - break; - } - } - break; - - case NODE_XSTR: - result = rb_funcall(self, '`', 1, rb_str_new3(node->nd_lit)); - break; - - case NODE_LIT: - result = node->nd_lit; - break; - - case NODE_DEFN: - if (node->nd_defn) { - NODE *body, *defn; - VALUE origin; - int noex; - - if (NIL_P(ruby_class)) { - rb_raise(rb_eTypeError, "no class/module to add method"); - } - if (ruby_class == rb_cObject && node->nd_mid == init) { - rb_warn("redefining Object#initialize may cause infinite loop"); - } - if (node->nd_mid == __id__ || node->nd_mid == __send__) { - rb_warn("redefining `%s' may cause serious problem", - rb_id2name(node->nd_mid)); - } - rb_frozen_class_p(ruby_class); - body = search_method(ruby_class, node->nd_mid, &origin); - if (body){ - if (RTEST(ruby_verbose) && ruby_class == origin && body->nd_cnt == 0 && body->nd_body) { - rb_warning("method redefined; discarding old %s", rb_id2name(node->nd_mid)); - } - } - - if (SCOPE_TEST(SCOPE_PRIVATE) || node->nd_mid == init) { - noex = NOEX_PRIVATE; - } - else if (SCOPE_TEST(SCOPE_PROTECTED)) { - noex = NOEX_PROTECTED; - } - else { - noex = NOEX_PUBLIC; - } - if (body && origin == ruby_class && body->nd_body == 0) { - noex |= NOEX_NOSUPER; - } - - defn = rb_copy_node_scope(node->nd_defn, ruby_cref); - rb_add_method(ruby_class, node->nd_mid, defn, noex); - if (scope_vmode == SCOPE_MODFUNC) { - rb_add_method(rb_singleton_class(ruby_class), - node->nd_mid, defn, NOEX_PUBLIC); - } - result = Qnil; - } - break; - - case NODE_DEFS: - if (node->nd_defn) { - VALUE recv = rb_eval(self, node->nd_recv); - VALUE klass; - NODE *body = 0, *defn; - - if (ruby_safe_level >= 4 && !OBJ_TAINTED(recv)) { - rb_raise(rb_eSecurityError, "Insecure: can't define singleton method"); - } - if (FIXNUM_P(recv) || SYMBOL_P(recv)) { - rb_raise(rb_eTypeError, - "can't define singleton method \"%s\" for %s", - rb_id2name(node->nd_mid), - rb_obj_classname(recv)); - } - - if (OBJ_FROZEN(recv)) rb_error_frozen("object"); - klass = rb_singleton_class(recv); - if (st_lookup(RCLASS(klass)->m_tbl, node->nd_mid, &data)) { - body = (NODE *)data; - if (ruby_safe_level >= 4) { - rb_raise(rb_eSecurityError, "redefining method prohibited"); - } - if (RTEST(ruby_verbose)) { - rb_warning("redefine %s", rb_id2name(node->nd_mid)); - } - } - defn = rb_copy_node_scope(node->nd_defn, ruby_cref); - rb_add_method(klass, node->nd_mid, defn, - NOEX_PUBLIC|(body?body->nd_noex&NOEX_UNDEF:0)); - result = Qnil; - } - break; - - case NODE_UNDEF: - if (NIL_P(ruby_class)) { - rb_raise(rb_eTypeError, "no class to undef method"); - } - rb_undef(ruby_class, rb_to_id(rb_eval(self, node->u2.node))); - result = Qnil; - break; - - case NODE_ALIAS: - if (NIL_P(ruby_class)) { - rb_raise(rb_eTypeError, "no class to make alias"); - } - rb_alias(ruby_class, rb_to_id(rb_eval(self, node->u1.node)), - rb_to_id(rb_eval(self, node->u2.node))); - result = Qnil; - break; - - case NODE_VALIAS: - rb_alias_variable(node->u1.id, node->u2.id); - result = Qnil; - break; - - case NODE_CLASS: - { - VALUE super, klass, tmp, cbase; - ID cname; - int gen = Qfalse; - - cbase = class_prefix(self, node->nd_cpath); - cname = node->nd_cpath->nd_mid; - - if (NIL_P(ruby_cbase)) { - rb_raise(rb_eTypeError, "no outer class/module"); - } - if (node->nd_super) { - super = rb_eval(self, node->nd_super); - rb_check_inheritable(super); - } - else { - super = 0; - } - - if (rb_const_defined_at(cbase, cname)) { - klass = rb_const_get_at(cbase, cname); - if (TYPE(klass) != T_CLASS) { - rb_raise(rb_eTypeError, "%s is not a class", - rb_id2name(cname)); - } - if (super) { - tmp = rb_class_real(RCLASS(klass)->super); - if (tmp != super) { - rb_raise(rb_eTypeError, "superclass mismatch for class %s", - rb_id2name(cname)); - } - super = 0; - } - if (ruby_safe_level >= 4) { - rb_raise(rb_eSecurityError, "extending class prohibited"); - } - } - else { - if (!super) super = rb_cObject; - klass = rb_define_class_id(cname, super); - rb_set_class_path(klass, cbase, rb_id2name(cname)); - rb_const_set(cbase, cname, klass); - gen = Qtrue; - } - if (ruby_wrapper) { - rb_extend_object(klass, ruby_wrapper); - rb_include_module(klass, ruby_wrapper); - } - if (super && gen) { - rb_class_inherited(super, klass); - } - result = module_setup(klass, node); - } - break; - - case NODE_MODULE: - { - VALUE module, cbase; - ID cname; - - if (NIL_P(ruby_cbase)) { - rb_raise(rb_eTypeError, "no outer class/module"); - } - cbase = class_prefix(self, node->nd_cpath); - cname = node->nd_cpath->nd_mid; - if (rb_const_defined_at(cbase, cname)) { - module = rb_const_get_at(cbase, cname); - if (TYPE(module) != T_MODULE) { - rb_raise(rb_eTypeError, "%s is not a module", - rb_id2name(cname)); - } - if (ruby_safe_level >= 4) { - rb_raise(rb_eSecurityError, "extending module prohibited"); - } - } - else { - module = rb_define_module_id(cname); - rb_set_class_path(module, cbase, rb_id2name(cname)); - rb_const_set(cbase, cname, module); - } - if (ruby_wrapper) { - rb_extend_object(module, ruby_wrapper); - rb_include_module(module, ruby_wrapper); - } - - result = module_setup(module, node); - } - break; - - case NODE_SCLASS: - { - VALUE klass; - - result = rb_eval(self, node->nd_recv); - if (FIXNUM_P(result) || SYMBOL_P(result)) { - rb_raise(rb_eTypeError, "no virtual class for %s", - rb_obj_classname(result)); - } - if (ruby_safe_level >= 4 && !OBJ_TAINTED(result)) - rb_raise(rb_eSecurityError, "Insecure: can't extend object"); - klass = rb_singleton_class(result); - - if (ruby_wrapper) { - rb_extend_object(klass, ruby_wrapper); - rb_include_module(klass, ruby_wrapper); - } - - result = module_setup(klass, node); - } - break; - - case NODE_DEFINED: - { - char buf[20]; - char *desc = is_defined(self, node->nd_head, buf); - - if (desc) result = rb_str_new2(desc); - else result = Qnil; - } - break; - - case NODE_NEWLINE: - EXEC_EVENT_HOOK(RUBY_EVENT_LINE, node, self, - ruby_frame->last_func, - ruby_frame->last_class); - node = node->nd_next; - goto again; - - default: - unknown_node(node); - } - finish: - CHECK_INTS; - if (contnode) { - node = contnode; - contnode = 0; - goto again; - } - return result; -} - -static VALUE -module_setup(module, n) - VALUE module; - NODE *n; -{ - NODE * volatile node = n->nd_body; - int state; - struct FRAME frame; - VALUE result = Qnil; /* OK */ - TMP_PROTECT; - - frame = *ruby_frame; - frame.tmp = ruby_frame; - ruby_frame = &frame; - - PUSH_CLASS(module); - PUSH_SCOPE(); - PUSH_VARS(); - - if (node->nd_tbl) { - VALUE *vars = TMP_ALLOC(node->nd_tbl[0]+1); - *vars++ = (VALUE)node; - ruby_scope->local_vars = vars; - rb_mem_clear(ruby_scope->local_vars, node->nd_tbl[0]); - ruby_scope->local_tbl = node->nd_tbl; - } - else { - ruby_scope->local_vars = 0; - ruby_scope->local_tbl = 0; - } - - PUSH_CREF(module); - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - EXEC_EVENT_HOOK(RUBY_EVENT_CLASS, n, ruby_cbase, - ruby_frame->last_func, ruby_frame->last_class); - result = rb_eval(ruby_cbase, node->nd_next); - } - POP_TAG(); - POP_CREF(); - POP_VARS(); - POP_SCOPE(); - POP_CLASS(); - - ruby_frame = frame.tmp; - EXEC_EVENT_HOOK(RUBY_EVENT_END, n, 0, - ruby_frame->last_func, ruby_frame->last_class); - if (state) JUMP_TAG(state); - - return result; -} - -static NODE *basic_respond_to = 0; - -int -rb_obj_respond_to(obj, id, priv) - VALUE obj; - ID id; - int priv; -{ - VALUE klass = CLASS_OF(obj); - - if (rb_method_node(klass, respond_to) == basic_respond_to) { - return rb_method_boundp(klass, id, !priv); - } - else { - VALUE args[2]; - int n = 0; - args[n++] = ID2SYM(id); - if (priv) args[n++] = Qtrue; - return RTEST(rb_funcall2(obj, respond_to, n, args)); - } -} - -int -rb_respond_to(obj, id) - VALUE obj; - ID id; -{ - return rb_obj_respond_to(obj, id, Qfalse); -} - -/* - * call-seq: - * obj.respond_to?(symbol, include_private=false) => true or false - * - * Returns +true+> if _obj_ responds to the given - * method. Private methods are included in the search only if the - * optional second parameter evaluates to +true+. - */ - -static VALUE -obj_respond_to(argc, argv, obj) - int argc; - VALUE *argv; - VALUE obj; -{ - VALUE mid, priv; - ID id; - - rb_scan_args(argc, argv, "11", &mid, &priv); - id = rb_to_id(mid); - if (rb_method_boundp(CLASS_OF(obj), id, !RTEST(priv))) { - return Qtrue; - } - return Qfalse; -} - -/* - * call-seq: - * mod.method_defined?(symbol) => true or false - * - * Returns +true+ if the named method is defined by - * _mod_ (or its included modules and, if _mod_ is a class, - * its ancestors). Public and protected methods are matched. - * - * module A - * def method1() end - * end - * class B - * def method2() end - * end - * class C < B - * include A - * def method3() end - * end - * - * A.method_defined? :method1 #=> true - * C.method_defined? "method1" #=> true - * C.method_defined? "method2" #=> true - * C.method_defined? "method3" #=> true - * C.method_defined? "method4" #=> false - */ - -static VALUE -rb_mod_method_defined(mod, mid) - VALUE mod, mid; -{ - return rb_method_boundp(mod, rb_to_id(mid), 1); -} - -#define VISI_CHECK(x,f) (((x)&NOEX_MASK) == (f)) - -/* - * call-seq: - * mod.public_method_defined?(symbol) => true or false - * - * Returns +true+ if the named public method is defined by - * _mod_ (or its included modules and, if _mod_ is a class, - * its ancestors). - * - * module A - * def method1() end - * end - * class B - * protected - * def method2() end - * end - * class C < B - * include A - * def method3() end - * end - * - * A.method_defined? :method1 #=> true - * C.public_method_defined? "method1" #=> true - * C.public_method_defined? "method2" #=> false - * C.method_defined? "method2" #=> true - */ - -static VALUE -rb_mod_public_method_defined(mod, mid) - VALUE mod, mid; -{ - ID id = rb_to_id(mid); - int noex; - - if (rb_get_method_body(&mod, &id, &noex)) { - if (VISI_CHECK(noex, NOEX_PUBLIC)) - return Qtrue; - } - return Qfalse; -} - -/* - * call-seq: - * mod.private_method_defined?(symbol) => true or false - * - * Returns +true+ if the named private method is defined by - * _ mod_ (or its included modules and, if _mod_ is a class, - * its ancestors). - * - * module A - * def method1() end - * end - * class B - * private - * def method2() end - * end - * class C < B - * include A - * def method3() end - * end - * - * A.method_defined? :method1 #=> true - * C.private_method_defined? "method1" #=> false - * C.private_method_defined? "method2" #=> true - * C.method_defined? "method2" #=> false - */ - -static VALUE -rb_mod_private_method_defined(mod, mid) - VALUE mod, mid; -{ - ID id = rb_to_id(mid); - int noex; - - if (rb_get_method_body(&mod, &id, &noex)) { - if (VISI_CHECK(noex, NOEX_PRIVATE)) - return Qtrue; - } - return Qfalse; -} - -/* - * call-seq: - * mod.protected_method_defined?(symbol) => true or false - * - * Returns +true+ if the named protected method is defined - * by _mod_ (or its included modules and, if _mod_ is a - * class, its ancestors). - * - * module A - * def method1() end - * end - * class B - * protected - * def method2() end - * end - * class C < B - * include A - * def method3() end - * end - * - * A.method_defined? :method1 #=> true - * C.protected_method_defined? "method1" #=> false - * C.protected_method_defined? "method2" #=> true - * C.method_defined? "method2" #=> true - */ - -static VALUE -rb_mod_protected_method_defined(mod, mid) - VALUE mod, mid; -{ - ID id = rb_to_id(mid); - int noex; - - if (rb_get_method_body(&mod, &id, &noex)) { - if (VISI_CHECK(noex, NOEX_PROTECTED)) - return Qtrue; - } - return Qfalse; -} - -NORETURN(static VALUE terminate_process _((int, VALUE))); -static VALUE -terminate_process(status, mesg) - int status; - VALUE mesg; -{ - VALUE args[2]; - args[0] = INT2NUM(status); - args[1] = mesg; - - rb_exc_raise(rb_class_new_instance(2, args, rb_eSystemExit)); -} - -void -rb_exit(status) - int status; -{ - if (prot_tag) { - terminate_process(status, rb_str_new("exit", 4)); - } - ruby_finalize(); - exit(status); -} - - -/* - * call-seq: - * exit(integer=0) - * Kernel::exit(integer=0) - * Process::exit(integer=0) - * - * Initiates the termination of the Ruby script by raising the - * <code>SystemExit</code> exception. This exception may be caught. The - * optional parameter is used to return a status code to the invoking - * environment. - * - * begin - * exit - * puts "never get here" - * rescue SystemExit - * puts "rescued a SystemExit exception" - * end - * puts "after begin block" - * - * <em>produces:</em> - * - * rescued a SystemExit exception - * after begin block - * - * Just prior to termination, Ruby executes any <code>at_exit</code> functions - * (see Kernel::at_exit) and runs any object finalizers (see - * ObjectSpace::define_finalizer). - * - * at_exit { puts "at_exit function" } - * ObjectSpace.define_finalizer("string", proc { puts "in finalizer" }) - * exit - * - * <em>produces:</em> - * - * at_exit function - * in finalizer - */ - -VALUE -rb_f_exit(argc, argv) - int argc; - VALUE *argv; -{ - VALUE status; - int istatus; - - rb_secure(4); - if (rb_scan_args(argc, argv, "01", &status) == 1) { - switch (status) { - case Qtrue: - istatus = EXIT_SUCCESS; - break; - case Qfalse: - istatus = EXIT_FAILURE; - break; - default: - istatus = NUM2INT(status); -#if EXIT_SUCCESS != 0 - if (istatus == 0) istatus = EXIT_SUCCESS; -#endif - break; - } - } - else { - istatus = EXIT_SUCCESS; - } - rb_exit(istatus); - return Qnil; /* not reached */ -} - - -/* - * call-seq: - * abort - * Kernel::abort - * Process::abort - * - * Terminate execution immediately, effectively by calling - * <code>Kernel.exit(1)</code>. If _msg_ is given, it is written - * to STDERR prior to terminating. - */ - -VALUE -rb_f_abort(argc, argv) - int argc; - VALUE *argv; -{ - rb_secure(4); - if (argc == 0) { - if (!NIL_P(ruby_errinfo)) { - error_print(); - } - rb_exit(EXIT_FAILURE); - } - else { - VALUE mesg; - - rb_scan_args(argc, argv, "1", &mesg); - StringValue(mesg); - rb_io_puts(1, &mesg, rb_stderr); - terminate_process(EXIT_FAILURE, mesg); - } - return Qnil; /* not reached */ -} - -void -rb_iter_break() -{ - break_jump(Qnil); -} - -NORETURN(static void rb_longjmp _((int, VALUE))); -static VALUE make_backtrace _((void)); - -static void -rb_longjmp(tag, mesg) - int tag; - VALUE mesg; -{ - VALUE at; - rb_thread_t th = curr_thread; - - if (rb_thread_set_raised(th)) { - ruby_errinfo = exception_error; - JUMP_TAG(TAG_FATAL); - } - if (NIL_P(mesg)) mesg = ruby_errinfo; - if (NIL_P(mesg)) { - mesg = rb_exc_new(rb_eRuntimeError, 0, 0); - } - - ruby_set_current_source(); - if (ruby_sourcefile && !NIL_P(mesg)) { - at = get_backtrace(mesg); - if (NIL_P(at)) { - at = make_backtrace(); - if (OBJ_FROZEN(mesg)) { - mesg = rb_obj_dup(mesg); - } - set_backtrace(mesg, at); - } - } - if (!NIL_P(mesg)) { - ruby_errinfo = mesg; - } - - if (RTEST(ruby_debug) && !NIL_P(ruby_errinfo) - && !rb_obj_is_kind_of(ruby_errinfo, rb_eSystemExit)) { - VALUE e = ruby_errinfo; - int status; - - PUSH_TAG(PROT_NONE); - if ((status = EXEC_TAG()) == 0) { - StringValue(e); - warn_printf("Exception `%s' at %s:%d - %s\n", - rb_obj_classname(ruby_errinfo), - ruby_sourcefile, ruby_sourceline, - RSTRING(e)->ptr); - } - POP_TAG(); - if (status == TAG_FATAL && ruby_errinfo == exception_error) { - ruby_errinfo = mesg; - } - else if (status) { - rb_thread_reset_raised(th); - JUMP_TAG(status); - } - } - - rb_trap_restore_mask(); - if (tag != TAG_FATAL) { - EXEC_EVENT_HOOK(RUBY_EVENT_RAISE, ruby_current_node, - ruby_frame->self, - ruby_frame->last_func, - ruby_frame->last_class); - } - if (!prot_tag) { - error_print(); - } - rb_thread_raised_clear(th); - JUMP_TAG(tag); -} - -void -rb_exc_jump(mesg) - VALUE mesg; -{ - rb_thread_raised_clear(rb_curr_thread); - ruby_errinfo = mesg; - JUMP_TAG(TAG_RAISE); -} - -void -rb_exc_raise(mesg) - VALUE mesg; -{ - rb_longjmp(TAG_RAISE, mesg); -} - -void -rb_exc_fatal(mesg) - VALUE mesg; -{ - rb_longjmp(TAG_FATAL, mesg); -} - -void -rb_interrupt() -{ - rb_raise(rb_eInterrupt, ""); -} - -/* - * call-seq: - * raise - * raise(string) - * raise(exception [, string [, array]]) - * fail - * fail(string) - * fail(exception [, string [, array]]) - * - * With no arguments, raises the exception in <code>$!</code> or raises - * a <code>RuntimeError</code> if <code>$!</code> is +nil+. - * With a single +String+ argument, raises a - * +RuntimeError+ with the string as a message. Otherwise, - * the first parameter should be the name of an +Exception+ - * class (or an object that returns an +Exception+ object when sent - * an +exception+ message). The optional second parameter sets the - * message associated with the exception, and the third parameter is an - * array of callback information. Exceptions are caught by the - * +rescue+ clause of <code>begin...end</code> blocks. - * - * raise "Failed to create socket" - * raise ArgumentError, "No parameters", caller - */ - -static VALUE -rb_f_raise(argc, argv) - int argc; - VALUE *argv; -{ - rb_raise_jump(rb_make_exception(argc, argv)); - return Qnil; /* not reached */ -} - -static VALUE -rb_make_exception(argc, argv) - int argc; - VALUE *argv; -{ - VALUE mesg; - ID exception; - int n; - - mesg = Qnil; - switch (argc) { - case 0: - mesg = Qnil; - break; - case 1: - if (NIL_P(argv[0])) break; - if (TYPE(argv[0]) == T_STRING) { - mesg = rb_exc_new3(rb_eRuntimeError, argv[0]); - break; - } - n = 0; - goto exception_call; - - case 2: - case 3: - n = 1; - exception_call: - exception = rb_intern("exception"); - if (!rb_respond_to(argv[0], exception)) { - rb_raise(rb_eTypeError, "exception class/object expected"); - } - mesg = rb_funcall(argv[0], exception, n, argv[1]); - break; - default: - rb_raise(rb_eArgError, "wrong number of arguments"); - break; - } - if (argc > 0) { - if (!rb_obj_is_kind_of(mesg, rb_eException)) - rb_raise(rb_eTypeError, "exception object expected"); - if (argc>2) - set_backtrace(mesg, argv[2]); - } - - return mesg; -} - -static void -rb_raise_jump(mesg) - VALUE mesg; -{ - if (ruby_frame != top_frame) { - PUSH_FRAME(); /* fake frame */ - *ruby_frame = *_frame.prev->prev; - rb_longjmp(TAG_RAISE, mesg); - POP_FRAME(); - } - rb_longjmp(TAG_RAISE, mesg); -} - -void -rb_jump_tag(tag) - int tag; -{ - JUMP_TAG(tag); -} - -int -rb_block_given_p() -{ - if (ruby_frame->iter == ITER_CUR && ruby_block) - return Qtrue; - return Qfalse; -} - -int -rb_iterator_p() -{ - return rb_block_given_p(); -} - -/* - * call-seq: - * block_given? => true or false - * iterator? => true or false - * - * Returns <code>true</code> if <code>yield</code> would execute a - * block in the current context. The <code>iterator?</code> form - * is mildly deprecated. - * - * def try - * if block_given? - * yield - * else - * "no block" - * end - * end - * try #=> "no block" - * try { "hello" } #=> "hello" - * try do "hello" end #=> "hello" - */ - - -static VALUE -rb_f_block_given_p() -{ - if (ruby_frame->prev && ruby_frame->prev->iter == ITER_CUR && ruby_block) - return Qtrue; - return Qfalse; -} - -VALUE rb_eThreadError; - -NORETURN(static void proc_jump_error(int, VALUE)); -static void -proc_jump_error(state, result) - int state; - VALUE result; -{ - char mesg[32]; - char *statement; - - switch (state) { - case TAG_BREAK: - statement = "break"; break; - case TAG_RETURN: - statement = "return"; break; - case TAG_RETRY: - statement = "retry"; break; - default: - statement = "local-jump"; break; /* should not happen */ - } - snprintf(mesg, sizeof mesg, "%s from proc-closure", statement); - localjump_error(mesg, result, state); -} - -static void -return_jump(retval) - VALUE retval; -{ - struct tag *tt = prot_tag; - int yield = Qfalse; - - if (retval == Qundef) retval = Qnil; - while (tt) { - if (tt->tag == PROT_YIELD) { - yield = Qtrue; - tt = tt->prev; - } - if (tt->tag == PROT_FUNC && tt->frame->uniq == ruby_frame->uniq) { - tt->dst = (VALUE)ruby_frame->uniq; - tt->retval = retval; - JUMP_TAG(TAG_RETURN); - } - if (tt->tag == PROT_LAMBDA && !yield) { - tt->dst = (VALUE)tt->frame->uniq; - tt->retval = retval; - JUMP_TAG(TAG_RETURN); - } - if (tt->tag == PROT_THREAD) { - rb_raise(rb_eThreadError, "return can't jump across threads"); - } - tt = tt->prev; - } - localjump_error("unexpected return", retval, TAG_RETURN); -} - -static void -break_jump(retval) - VALUE retval; -{ - struct tag *tt = prot_tag; - - if (retval == Qundef) retval = Qnil; - while (tt) { - switch (tt->tag) { - case PROT_THREAD: - case PROT_YIELD: - case PROT_LOOP: - case PROT_LAMBDA: - tt->dst = (VALUE)tt->frame->uniq; - tt->retval = retval; - JUMP_TAG(TAG_BREAK); - break; - case PROT_FUNC: - tt = 0; - continue; - default: - break; - } - tt = tt->prev; - } - localjump_error("unexpected break", retval, TAG_BREAK); -} - -static void -next_jump(retval) - VALUE retval; -{ - struct tag *tt = prot_tag; - - if (retval == Qundef) retval = Qnil; - while (tt) { - switch (tt->tag) { - case PROT_THREAD: - case PROT_YIELD: - case PROT_LOOP: - case PROT_LAMBDA: - case PROT_FUNC: - tt->dst = (VALUE)tt->frame->uniq; - tt->retval = retval; - JUMP_TAG(TAG_NEXT); - break; - default: - break; - } - tt = tt->prev; - } - localjump_error("unexpected next", retval, TAG_NEXT); -} - -void -rb_need_block() -{ - if (!rb_block_given_p()) { - localjump_error("no block given", Qnil, 0); - } -} - -static VALUE -rb_yield_0(val, self, klass, flags, avalue) - VALUE val, self, klass; /* OK */ - int flags, avalue; -{ - NODE *node; - volatile VALUE result = Qnil; - volatile VALUE old_cref; - volatile VALUE old_wrapper; - struct BLOCK * volatile block; - struct SCOPE * volatile old_scope; - int old_vmode; - struct FRAME frame; - NODE *cnode = ruby_current_node; - int lambda = flags & YIELD_LAMBDA_CALL; - int state; - - rb_need_block(); - - PUSH_VARS(); - block = ruby_block; - frame = block->frame; - frame.prev = ruby_frame; - frame.node = cnode; - ruby_frame = &(frame); - old_cref = (VALUE)ruby_cref; - ruby_cref = block->cref; - old_wrapper = ruby_wrapper; - ruby_wrapper = block->wrapper; - old_scope = ruby_scope; - ruby_scope = block->scope; - old_vmode = scope_vmode; - scope_vmode = (flags & YIELD_PUBLIC_DEF) ? SCOPE_PUBLIC : block->vmode; - ruby_block = block->prev; - if (block->flags & BLOCK_D_SCOPE) { - /* put place holder for dynamic (in-block) local variables */ - ruby_dyna_vars = new_dvar(0, 0, block->dyna_vars); - } - else { - /* FOR does not introduce new scope */ - ruby_dyna_vars = block->dyna_vars; - } - PUSH_CLASS(klass ? klass : block->klass); - if (!klass) { - self = block->self; - } - node = block->body; - - if (block->var) { - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - if (block->var == (NODE*)1) { /* no parameter || */ - if (lambda && RARRAY(val)->len != 0) { - rb_raise(rb_eArgError, "wrong number of arguments (%ld for 0)", - RARRAY(val)->len); - } - } - else if (block->var == (NODE*)2) { - if (TYPE(val) == T_ARRAY && RARRAY(val)->len != 0) { - rb_raise(rb_eArgError, "wrong number of arguments (%ld for 0)", - RARRAY(val)->len); - } - } - else if (nd_type(block->var) == NODE_MASGN) { - if (!avalue) { - val = svalue_to_mrhs(val, block->var->nd_head); - } - massign(self, block->var, val, lambda); - } - else { - int len = 0; - if (avalue) { - len = RARRAY(val)->len; - if (len == 0) { - goto zero_arg; - } - if (len == 1) { - val = RARRAY(val)->ptr[0]; - } - else { - goto multi_values; - } - } - else if (val == Qundef) { - zero_arg: - val = Qnil; - multi_values: - { - ruby_current_node = block->var; - rb_warn("multiple values for a block parameter (%d for 1)\n\tfrom %s:%d", - len, cnode->nd_file, nd_line(cnode)); - ruby_current_node = cnode; - } - } - assign(self, block->var, val, lambda); - } - } - POP_TAG(); - if (state) goto pop_state; - } - if (!node) { - state = 0; - goto pop_state; - } - ruby_current_node = node; - - PUSH_ITER(block->iter); - PUSH_TAG(lambda ? PROT_NONE : PROT_YIELD); - if ((state = EXEC_TAG()) == 0) { - redo: - if (nd_type(node) == NODE_CFUNC || nd_type(node) == NODE_IFUNC) { - if (node->nd_state == YIELD_FUNC_AVALUE) { - if (!avalue) { - val = svalue_to_avalue(val); - } - } - else { - if (avalue) { - val = avalue_to_svalue(val); - } - if (val == Qundef && node->nd_state != YIELD_FUNC_SVALUE) - val = Qnil; - } - result = (*node->nd_cfnc)(val, node->nd_tval, self); - } - else { - result = rb_eval(self, node); - } - } - else { - switch (state) { - case TAG_REDO: - state = 0; - CHECK_INTS; - goto redo; - case TAG_NEXT: - if (!lambda) { - state = 0; - result = prot_tag->retval; - } - break; - case TAG_BREAK: - if (TAG_DST()) { - result = prot_tag->retval; - } - else { - lambda = Qtrue; /* just pass TAG_BREAK */ - } - break; - default: - break; - } - } - POP_TAG(); - POP_ITER(); - pop_state: - POP_CLASS(); - if (ruby_dyna_vars && (block->flags & BLOCK_D_SCOPE) && - !FL_TEST(ruby_dyna_vars, DVAR_DONT_RECYCLE)) { - struct RVarmap *vars = ruby_dyna_vars; - - if (ruby_dyna_vars->id == 0) { - vars = ruby_dyna_vars->next; - rb_gc_force_recycle((VALUE)ruby_dyna_vars); - while (vars && vars->id != 0 && vars != block->dyna_vars) { - struct RVarmap *tmp = vars->next; - rb_gc_force_recycle((VALUE)vars); - vars = tmp; - } - } - } - POP_VARS(); - ruby_block = block; - ruby_frame = ruby_frame->prev; - ruby_cref = (NODE*)old_cref; - ruby_wrapper = old_wrapper; - if (ruby_scope->flags & SCOPE_DONT_RECYCLE) - scope_dup(old_scope); - ruby_scope = old_scope; - scope_vmode = old_vmode; - switch (state) { - case 0: - break; - case TAG_BREAK: - if (!lambda) { - struct tag *tt = prot_tag; - - while (tt) { - if (tt->tag == PROT_LOOP && tt->blkid == ruby_block->uniq) { - tt->dst = (VALUE)tt->frame->uniq; - tt->retval = result; - JUMP_TAG(TAG_BREAK); - } - tt = tt->prev; - } - proc_jump_error(TAG_BREAK, result); - } - /* fall through */ - default: - JUMP_TAG(state); - break; - } - ruby_current_node = cnode; - return result; -} - -VALUE -rb_yield(val) - VALUE val; -{ - return rb_yield_0(val, 0, 0, 0, Qfalse); -} - -VALUE -#ifdef HAVE_STDARG_PROTOTYPES -rb_yield_values(int n, ...) -#else -rb_yield_values(n, va_alist) - int n; - va_dcl -#endif -{ - va_list args; - VALUE ary; - - if (n == 0) { - return rb_yield_0(Qundef, 0, 0, 0, Qfalse); - } - ary = rb_ary_new2(n); - va_init_list(args, n); - while (n--) { - rb_ary_push(ary, va_arg(args, VALUE)); - } - va_end(args); - return rb_yield_0(ary, 0, 0, 0, Qtrue); -} - -VALUE -rb_yield_splat(values) - VALUE values; -{ - int avalue = Qfalse; - - if (TYPE(values) == T_ARRAY) { - if (RARRAY(values)->len == 0) { - values = Qundef; - } - else { - avalue = Qtrue; - } - } - return rb_yield_0(values, 0, 0, 0, avalue); -} - -/* - * call-seq: - * loop {|| block } - * - * Repeatedly executes the block. - * - * loop do - * print "Input: " - * line = gets - * break if !line or line =~ /^qQ/ - * # ... - * end - */ - -static VALUE -rb_f_loop() -{ - for (;;) { - rb_yield_0(Qundef, 0, 0, 0, Qfalse); - CHECK_INTS; - } - return Qnil; /* dummy */ -} - -static VALUE -massign(self, node, val, pcall) - VALUE self; - NODE *node; - VALUE val; - int pcall; -{ - NODE *list; - long i = 0, len; - - len = RARRAY(val)->len; - list = node->nd_head; - for (; list && i<len; i++) { - assign(self, list->nd_head, RARRAY(val)->ptr[i], pcall); - list = list->nd_next; - } - if (pcall && list) goto arg_error; - if (node->nd_args) { - if ((long)(node->nd_args) == -1) { - /* no check for mere `*' */ - } - else if (!list && i<len) { - assign(self, node->nd_args, rb_ary_new4(len-i, RARRAY(val)->ptr+i), pcall); - } - else { - assign(self, node->nd_args, rb_ary_new2(0), pcall); - } - } - else if (pcall && i < len) { - goto arg_error; - } - - while (list) { - i++; - assign(self, list->nd_head, Qnil, pcall); - list = list->nd_next; - } - return val; - - arg_error: - while (list) { - i++; - list = list->nd_next; - } - rb_raise(rb_eArgError, "wrong number of arguments (%ld for %ld)", len, i); -} - -static void -assign(self, lhs, val, pcall) - VALUE self; - NODE *lhs; - VALUE val; - int pcall; -{ - ruby_current_node = lhs; - if (val == Qundef) { - rb_warning("assigning void value"); - val = Qnil; - } - switch (nd_type(lhs)) { - case NODE_GASGN: - rb_gvar_set(lhs->nd_entry, val); - break; - - case NODE_IASGN: - rb_ivar_set(self, lhs->nd_vid, val); - break; - - case NODE_LASGN: - if (ruby_scope->local_vars == 0) - rb_bug("unexpected local variable assignment"); - ruby_scope->local_vars[lhs->nd_cnt] = val; - break; - - case NODE_DASGN: - dvar_asgn(lhs->nd_vid, val); - break; - - case NODE_DASGN_CURR: - dvar_asgn_curr(lhs->nd_vid, val); - break; - - case NODE_CDECL: - if (lhs->nd_vid == 0) { - rb_const_set(class_prefix(self, lhs->nd_else), lhs->nd_else->nd_mid, val); - } - else { - rb_const_set(ruby_cbase, lhs->nd_vid, val); - } - break; - - case NODE_CVDECL: - if (RTEST(ruby_verbose) && FL_TEST(ruby_cbase, FL_SINGLETON)) { - rb_warn("declaring singleton class variable"); - } - rb_cvar_set(cvar_cbase(), lhs->nd_vid, val, Qtrue); - break; - - case NODE_CVASGN: - rb_cvar_set(cvar_cbase(), lhs->nd_vid, val, Qfalse); - break; - - case NODE_MASGN: - massign(self, lhs, svalue_to_mrhs(val, lhs->nd_head), pcall); - break; - - case NODE_CALL: - case NODE_ATTRASGN: - { - VALUE recv; - int scope; - if (lhs->nd_recv == (NODE *)1) { - recv = self; - scope = 1; - } - else { - recv = rb_eval(self, lhs->nd_recv); - scope = 0; - } - if (!lhs->nd_args) { - /* attr set */ - ruby_current_node = lhs; - SET_CURRENT_SOURCE(); - rb_call(CLASS_OF(recv), recv, lhs->nd_mid, 1, &val, scope, self); - } - else { - /* array set */ - VALUE args; - - args = rb_eval(self, lhs->nd_args); - rb_ary_push(args, val); - ruby_current_node = lhs; - SET_CURRENT_SOURCE(); - rb_call(CLASS_OF(recv), recv, lhs->nd_mid, - RARRAY(args)->len, RARRAY(args)->ptr, scope, self); - } - } - break; - - default: - rb_bug("bug in variable assignment"); - break; - } -} - -VALUE -rb_iterate(it_proc, data1, bl_proc, data2) - VALUE (*it_proc) _((VALUE)), (*bl_proc)(ANYARGS); - VALUE data1, data2; -{ - int state; - volatile VALUE retval = Qnil; - NODE *node = NEW_IFUNC(bl_proc, data2); - VALUE self = ruby_top_self; - - PUSH_TAG(PROT_LOOP); - PUSH_BLOCK(0, node); - PUSH_ITER(ITER_PRE); - state = EXEC_TAG(); - if (state == 0) { - iter_retry: - retval = (*it_proc)(data1); - } - else if (state == TAG_BREAK && TAG_DST()) { - retval = prot_tag->retval; - state = 0; - } - else if (state == TAG_RETRY) { - state = 0; - goto iter_retry; - } - POP_ITER(); - POP_BLOCK(); - POP_TAG(); - - switch (state) { - case 0: - break; - default: - JUMP_TAG(state); - } - return retval; -} - -static int -handle_rescue(self, node) - VALUE self; - NODE *node; -{ - int argc; VALUE *argv; /* used in SETUP_ARGS */ - TMP_PROTECT; - - if (!node->nd_args) { - return rb_obj_is_kind_of(ruby_errinfo, rb_eStandardError); - } - - BEGIN_CALLARGS; - SETUP_ARGS(node->nd_args); - END_CALLARGS; - - while (argc--) { - if (!rb_obj_is_kind_of(argv[0], rb_cModule)) { - rb_raise(rb_eTypeError, "class or module required for rescue clause"); - } - if (RTEST(rb_funcall(*argv, eqq, 1, ruby_errinfo))) return 1; - argv++; - } - return 0; -} - -VALUE -#ifdef HAVE_STDARG_PROTOTYPES -rb_rescue2(VALUE (*b_proc)(ANYARGS), VALUE data1, VALUE (*r_proc)(ANYARGS), VALUE data2, ...) -#else -rb_rescue2(b_proc, data1, r_proc, data2, va_alist) - VALUE (*b_proc)(ANYARGS), (*r_proc)(ANYARGS); - VALUE data1, data2; - va_dcl -#endif -{ - int state; - volatile VALUE result; - volatile VALUE e_info = ruby_errinfo; - volatile int handle = Qfalse; - VALUE eclass; - va_list args; - - PUSH_TAG(PROT_NONE); - switch (state = EXEC_TAG()) { - case TAG_RETRY: - if (!handle) break; - handle = Qfalse; - state = 0; - ruby_errinfo = Qnil; - case 0: - result = (*b_proc)(data1); - break; - case TAG_RAISE: - if (handle) break; - handle = Qfalse; - va_init_list(args, data2); - while ((eclass = va_arg(args, VALUE)) != 0) { - if (rb_obj_is_kind_of(ruby_errinfo, eclass)) { - handle = Qtrue; - break; - } - } - va_end(args); - - if (handle) { - state = 0; - if (r_proc) { - result = (*r_proc)(data2, ruby_errinfo); - } - else { - result = Qnil; - } - ruby_errinfo = e_info; - } - } - POP_TAG(); - if (state) JUMP_TAG(state); - - return result; -} - -VALUE -rb_rescue(b_proc, data1, r_proc, data2) - VALUE (*b_proc)(), (*r_proc)(); - VALUE data1, data2; -{ - return rb_rescue2(b_proc, data1, r_proc, data2, rb_eStandardError, (VALUE)0); -} - -static VALUE cont_protect; - -VALUE -rb_protect(proc, data, state) - VALUE (*proc) _((VALUE)); - VALUE data; - int *state; -{ - VALUE result = Qnil; /* OK */ - int status; - - PUSH_TAG(PROT_NONE); - cont_protect = (VALUE)rb_node_newnode(NODE_MEMO, cont_protect, 0, 0); - if ((status = EXEC_TAG()) == 0) { - result = (*proc)(data); - } - cont_protect = ((NODE *)cont_protect)->u1.value; - POP_TAG(); - if (state) { - *state = status; - } - if (status != 0) { - return Qnil; - } - - return result; -} - -VALUE -rb_ensure(b_proc, data1, e_proc, data2) - VALUE (*b_proc)(); - VALUE data1; - VALUE (*e_proc)(); - VALUE data2; -{ - int state; - volatile VALUE result = Qnil; - VALUE retval; - - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - result = (*b_proc)(data1); - } - POP_TAG(); - retval = prot_tag ? prot_tag->retval : Qnil; /* save retval */ - if (!thread_no_ensure()) { - (*e_proc)(data2); - } - if (prot_tag) return_value(retval); - if (state) JUMP_TAG(state); - return result; -} - -VALUE -rb_with_disable_interrupt(proc, data) - VALUE (*proc)(); - VALUE data; -{ - VALUE result = Qnil; /* OK */ - int status; - - DEFER_INTS; - { - int thr_critical = rb_thread_critical; - - rb_thread_critical = Qtrue; - PUSH_TAG(PROT_NONE); - if ((status = EXEC_TAG()) == 0) { - result = (*proc)(data); - } - POP_TAG(); - rb_thread_critical = thr_critical; - } - ENABLE_INTS; - if (status) JUMP_TAG(status); - - return result; -} - -static void -stack_check() -{ - rb_thread_t th = rb_curr_thread; - - if (!rb_thread_raised_p(th, RAISED_STACKOVERFLOW) && ruby_stack_check()) { - rb_thread_raised_set(th, RAISED_STACKOVERFLOW); - rb_exc_raise(sysstack_error); - } -} - -static int last_call_status; - -#define CSTAT_PRIV 1 -#define CSTAT_PROT 2 -#define CSTAT_VCALL 4 -#define CSTAT_SUPER 8 - -/* - * call-seq: - * obj.method_missing(symbol [, *args] ) => result - * - * Invoked by Ruby when <i>obj</i> is sent a message it cannot handle. - * <i>symbol</i> is the symbol for the method called, and <i>args</i> - * are any arguments that were passed to it. By default, the interpreter - * raises an error when this method is called. However, it is possible - * to override the method to provide more dynamic behavior. - * The example below creates - * a class <code>Roman</code>, which responds to methods with names - * consisting of roman numerals, returning the corresponding integer - * values. - * - * class Roman - * def romanToInt(str) - * # ... - * end - * def method_missing(methId) - * str = methId.id2name - * romanToInt(str) - * end - * end - * - * r = Roman.new - * r.iv #=> 4 - * r.xxiii #=> 23 - * r.mm #=> 2000 - */ - -static VALUE -rb_method_missing(argc, argv, obj) - int argc; - VALUE *argv; - VALUE obj; -{ - ID id; - VALUE exc = rb_eNoMethodError; - char *format = 0; - NODE *cnode = ruby_current_node; - - if (argc == 0 || !SYMBOL_P(argv[0])) { - rb_raise(rb_eArgError, "no id given"); - } - - stack_check(); - - id = SYM2ID(argv[0]); - - if (last_call_status & CSTAT_PRIV) { - format = "private method `%s' called for %s"; - } - else if (last_call_status & CSTAT_PROT) { - format = "protected method `%s' called for %s"; - } - else if (last_call_status & CSTAT_VCALL) { - format = "undefined local variable or method `%s' for %s"; - exc = rb_eNameError; - } - else if (last_call_status & CSTAT_SUPER) { - format = "super: no superclass method `%s'"; - } - if (!format) { - format = "undefined method `%s' for %s"; - } - - ruby_current_node = cnode; - { - int n = 0; - VALUE args[3]; - - args[n++] = rb_funcall(rb_const_get(exc, rb_intern("message")), '!', - 3, rb_str_new2(format), obj, argv[0]); - args[n++] = argv[0]; - if (exc == rb_eNoMethodError) { - args[n++] = rb_ary_new4(argc-1, argv+1); - } - exc = rb_class_new_instance(n, args, exc); - ruby_frame = ruby_frame->prev; /* pop frame for "method_missing" */ - rb_exc_raise(exc); - } - - return Qnil; /* not reached */ -} - -static VALUE -method_missing(obj, id, argc, argv, call_status) - VALUE obj; - ID id; - int argc; - const VALUE *argv; - int call_status; -{ - VALUE *nargv; - - last_call_status = call_status; - - if (id == missing) { - PUSH_FRAME(); - rb_method_missing(argc, argv, obj); - POP_FRAME(); - } - else if (id == ID_ALLOCATOR) { - rb_raise(rb_eTypeError, "allocator undefined for %s", rb_class2name(obj)); - } - if (argc < 0) { - VALUE tmp; - - argc = -argc-1; - tmp = splat_value(argv[argc]); - nargv = ALLOCA_N(VALUE, argc + RARRAY(tmp)->len + 1); - MEMCPY(nargv+1, argv, VALUE, argc); - MEMCPY(nargv+1+argc, RARRAY(tmp)->ptr, VALUE, RARRAY(tmp)->len); - argc += RARRAY(tmp)->len; - } - else { - nargv = ALLOCA_N(VALUE, argc+1); - MEMCPY(nargv+1, argv, VALUE, argc); - } - nargv[0] = ID2SYM(id); - return rb_funcall2(obj, missing, argc+1, nargv); -} - -static inline VALUE -call_cfunc(func, recv, len, argc, argv) - VALUE (*func)(); - VALUE recv; - int len, argc; - VALUE *argv; -{ - if (len >= 0 && argc != len) { - rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", - argc, len); - } - - switch (len) { - case -2: - return (*func)(recv, rb_ary_new4(argc, argv)); - break; - case -1: - return (*func)(argc, argv, recv); - break; - case 0: - return (*func)(recv); - break; - case 1: - return (*func)(recv, argv[0]); - break; - case 2: - return (*func)(recv, argv[0], argv[1]); - break; - case 3: - return (*func)(recv, argv[0], argv[1], argv[2]); - break; - case 4: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3]); - break; - case 5: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4]); - break; - case 6: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5]); - break; - case 7: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6]); - break; - case 8: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6], argv[7]); - break; - case 9: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6], argv[7], argv[8]); - break; - case 10: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6], argv[7], argv[8], argv[9]); - break; - case 11: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6], argv[7], argv[8], argv[9], argv[10]); - break; - case 12: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6], argv[7], argv[8], argv[9], - argv[10], argv[11]); - break; - case 13: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6], argv[7], argv[8], argv[9], argv[10], - argv[11], argv[12]); - break; - case 14: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6], argv[7], argv[8], argv[9], argv[10], - argv[11], argv[12], argv[13]); - break; - case 15: - return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], - argv[5], argv[6], argv[7], argv[8], argv[9], argv[10], - argv[11], argv[12], argv[13], argv[14]); - break; - default: - rb_raise(rb_eArgError, "too many arguments (%d)", len); - break; - } - return Qnil; /* not reached */ -} - -static VALUE -rb_call0(klass, recv, id, oid, argc, argv, body, flags) - VALUE klass, recv; - ID id; - ID oid; - int argc; /* OK */ - VALUE *argv; /* OK */ - NODE * volatile body; - int flags; -{ - NODE *b2; /* OK */ - volatile VALUE result = Qnil; - int itr; - static int tick; - TMP_PROTECT; - volatile int safe = -1; - - if (NOEX_SAFE(flags) > ruby_safe_level && NOEX_SAFE(flags) > 2) { - rb_raise(rb_eSecurityError, "calling insecure method: %s", - rb_id2name(id)); - } - switch (ruby_iter->iter) { - case ITER_PRE: - case ITER_PAS: - itr = ITER_CUR; - break; - case ITER_CUR: - default: - itr = ITER_NOT; - break; - } - - if ((++tick & 0xff) == 0) { - CHECK_INTS; /* better than nothing */ - stack_check(); - rb_gc_finalize_deferred(); - } - if (argc < 0) { - VALUE tmp; - VALUE *nargv; - - argc = -argc-1; - tmp = splat_value(argv[argc]); - nargv = TMP_ALLOC(argc + RARRAY(tmp)->len); - MEMCPY(nargv, argv, VALUE, argc); - MEMCPY(nargv+argc, RARRAY(tmp)->ptr, VALUE, RARRAY(tmp)->len); - argc += RARRAY(tmp)->len; - argv = nargv; - } - PUSH_ITER(itr); - PUSH_FRAME(); - - ruby_frame->last_func = id; - ruby_frame->orig_func = oid; - ruby_frame->last_class = (flags & NOEX_NOSUPER)?0:klass; - ruby_frame->self = recv; - ruby_frame->argc = argc; - ruby_frame->flags = 0; - - switch (nd_type(body)) { - case NODE_CFUNC: - { - int len = body->nd_argc; - - if (len < -2) { - rb_bug("bad argc (%d) specified for `%s(%s)'", - len, rb_class2name(klass), rb_id2name(id)); - } - if (event_hooks) { - int state; - - EXEC_EVENT_HOOK(RUBY_EVENT_C_CALL, ruby_current_node, - recv, id, klass); - PUSH_TAG(PROT_FUNC); - if ((state = EXEC_TAG()) == 0) { - result = call_cfunc(body->nd_cfnc, recv, len, argc, argv); - } - POP_TAG(); - ruby_current_node = ruby_frame->node; - EXEC_EVENT_HOOK(RUBY_EVENT_C_RETURN, ruby_current_node, - recv, id, klass); - if (state) JUMP_TAG(state); - } - else { - result = call_cfunc(body->nd_cfnc, recv, len, argc, argv); - } - } - break; - - /* for attr get/set */ - case NODE_IVAR: - if (argc != 0) { - rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", argc); - } - result = rb_attr_get(recv, body->nd_vid); - break; - - case NODE_ATTRSET: - if (argc != 1) - rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc); - result = rb_ivar_set(recv, body->nd_vid, argv[0]); - break; - - case NODE_ZSUPER: - result = rb_call_super(argc, argv); - break; - - case NODE_DMETHOD: - result = method_call(argc, argv, umethod_bind(body->nd_cval, recv)); - break; - - case NODE_BMETHOD: - ruby_frame->flags |= FRAME_DMETH; - if (event_hooks) { - struct BLOCK *data; - Data_Get_Struct(body->nd_cval, struct BLOCK, data); - EXEC_EVENT_HOOK(RUBY_EVENT_CALL, data->body, recv, id, klass); - } - result = proc_invoke(body->nd_cval, rb_ary_new4(argc, argv), recv, klass); - if (event_hooks) { - EXEC_EVENT_HOOK(RUBY_EVENT_RETURN, body, recv, id, klass); - } - break; - - case NODE_SCOPE: - { - int state; - VALUE *local_vars; /* OK */ - NODE *saved_cref = 0; - - PUSH_SCOPE(); - if (body->nd_rval) { - saved_cref = ruby_cref; - ruby_cref = (NODE*)body->nd_rval; - } - PUSH_CLASS(ruby_cbase); - if (body->nd_tbl) { - local_vars = TMP_ALLOC(body->nd_tbl[0]+1); - *local_vars++ = (VALUE)body; - rb_mem_clear(local_vars, body->nd_tbl[0]); - ruby_scope->local_tbl = body->nd_tbl; - ruby_scope->local_vars = local_vars; - } - else { - local_vars = ruby_scope->local_vars = 0; - ruby_scope->local_tbl = 0; - } - b2 = body = body->nd_next; - - if (NOEX_SAFE(flags) > ruby_safe_level) { - safe = ruby_safe_level; - ruby_safe_level = NOEX_SAFE(flags); - } - PUSH_VARS(); - PUSH_TAG(PROT_FUNC); - if ((state = EXEC_TAG()) == 0) { - NODE *node = 0; - int i, nopt = 0; - - if (nd_type(body) == NODE_ARGS) { - node = body; - body = 0; - } - else if (nd_type(body) == NODE_BLOCK) { - node = body->nd_head; - body = body->nd_next; - } - if (node) { - if (nd_type(node) != NODE_ARGS) { - rb_bug("no argument-node"); - } - - i = node->nd_cnt; - if (i > argc) { - rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", - argc, i); - } - if (!node->nd_rest) { - NODE *optnode = node->nd_opt; - - nopt = i; - while (optnode) { - nopt++; - optnode = optnode->nd_next; - } - if (nopt < argc) { - rb_raise(rb_eArgError, - "wrong number of arguments (%d for %d)", - argc, nopt); - } - } - if (local_vars) { - if (i > 0) { - /* +2 for $_ and $~ */ - MEMCPY(local_vars+2, argv, VALUE, i); - } - } - argv += i; argc -= i; - if (node->nd_opt) { - NODE *opt = node->nd_opt; - - while (opt && argc) { - assign(recv, opt->nd_head, *argv, 1); - argv++; argc--; - ++i; - opt = opt->nd_next; - } - if (opt) { - rb_eval(recv, opt); - while (opt) { - opt = opt->nd_next; - ++i; - } - } - } - if (!node->nd_rest) { - i = nopt; - } - else { - VALUE v; - - if (argc > 0) { - v = rb_ary_new4(argc,argv); - i = -i - 1; - } - else { - v = rb_ary_new2(0); - } - assign(recv, node->nd_rest, v, 1); - } - ruby_frame->argc = i; - } - if (event_hooks) { - EXEC_EVENT_HOOK(RUBY_EVENT_CALL, b2, recv, id, klass); - } - result = rb_eval(recv, body); - } - else if (state == TAG_RETURN && TAG_DST()) { - result = prot_tag->retval; - state = 0; - } - POP_TAG(); - if (event_hooks) { - EXEC_EVENT_HOOK(RUBY_EVENT_RETURN, body, recv, id, klass); - } - POP_VARS(); - POP_CLASS(); - POP_SCOPE(); - ruby_cref = saved_cref; - if (safe >= 0) ruby_safe_level = safe; - switch (state) { - case 0: - break; - - case TAG_BREAK: - case TAG_RETURN: - JUMP_TAG(state); - break; - - case TAG_RETRY: - if (rb_block_given_p()) JUMP_TAG(state); - /* fall through */ - default: - jump_tag_but_local_jump(state, result); - break; - } - } - break; - - default: - unknown_node(body); - break; - } - POP_FRAME(); - POP_ITER(); - return result; -} - -static VALUE -rb_call(klass, recv, mid, argc, argv, scope, self) - VALUE klass, recv; - ID mid; - int argc; /* OK */ - const VALUE *argv; /* OK */ - int scope; - VALUE self; -{ - NODE *body; /* OK */ - int noex; - ID id = mid; - struct cache_entry *ent; - - if (!klass) { - rb_raise(rb_eNotImpError, "method `%s' called on terminated object (0x%lx)", - rb_id2name(mid), recv); - } - /* is it in the method cache? */ - ent = cache + EXPR1(klass, mid); - if (ent->mid == mid && ent->klass == klass) { - if (!ent->method) - return method_missing(recv, mid, argc, argv, scope==2?CSTAT_VCALL:0); - klass = ent->origin; - id = ent->mid0; - noex = ent->noex; - body = ent->method; - } - else if ((body = rb_get_method_body(&klass, &id, &noex)) == 0) { - if (scope == 3) { - return method_missing(recv, mid, argc, argv, CSTAT_SUPER); - } - return method_missing(recv, mid, argc, argv, scope==2?CSTAT_VCALL:0); - } - - if (mid != missing && scope == 0) { - /* receiver specified form for private method */ - if (noex & NOEX_PRIVATE) - return method_missing(recv, mid, argc, argv, CSTAT_PRIV); - - /* self must be kind of a specified form for protected method */ - if (noex & NOEX_PROTECTED) { - VALUE defined_class = klass; - - if (self == Qundef) self = ruby_frame->self; - if (TYPE(defined_class) == T_ICLASS) { - defined_class = RBASIC(defined_class)->klass; - } - if (!rb_obj_is_kind_of(self, rb_class_real(defined_class))) - return method_missing(recv, mid, argc, argv, CSTAT_PROT); - } - } - - return rb_call0(klass, recv, mid, id, argc, argv, body, noex); -} - -VALUE -rb_apply(recv, mid, args) - VALUE recv; - ID mid; - VALUE args; -{ - int argc; - VALUE *argv; - - argc = RARRAY(args)->len; /* Assigns LONG, but argc is INT */ - argv = ALLOCA_N(VALUE, argc); - MEMCPY(argv, RARRAY(args)->ptr, VALUE, argc); - return rb_call(CLASS_OF(recv), recv, mid, argc, argv, 1, Qundef); -} - -/* - * call-seq: - * obj.send(symbol [, args...]) => obj - * obj.__send__(symbol [, args...]) => obj - * - * Invokes the method identified by _symbol_, passing it any - * arguments specified. You can use <code>\_\_send__</code> if the name - * +send+ clashes with an existing method in _obj_. - * - * class Klass - * def hello(*args) - * "Hello " + args.join(' ') - * end - * end - * k = Klass.new - * k.send :hello, "gentle", "readers" #=> "Hello gentle readers" - */ - -static VALUE -rb_f_send(argc, argv, recv) - int argc; - VALUE *argv; - VALUE recv; -{ - VALUE vid; - - if (argc == 0) rb_raise(rb_eArgError, "no method name given"); - - vid = *argv++; argc--; - PUSH_ITER(rb_block_given_p()?ITER_PRE:ITER_NOT); - vid = rb_call(CLASS_OF(recv), recv, rb_to_id(vid), argc, argv, 1, Qundef); - POP_ITER(); - - return vid; -} - -static VALUE -vafuncall(recv, mid, n, ar) - VALUE recv; - ID mid; - int n; - va_list *ar; -{ - VALUE *argv; - - if (n > 0) { - long i; - - argv = ALLOCA_N(VALUE, n); - - for (i=0;i<n;i++) { - argv[i] = va_arg(*ar, VALUE); - } - va_end(*ar); - } - else { - argv = 0; - } - - return rb_call(CLASS_OF(recv), recv, mid, n, argv, 1, Qundef); -} - -VALUE -#ifdef HAVE_STDARG_PROTOTYPES -rb_funcall(VALUE recv, ID mid, int n, ...) -#else -rb_funcall(recv, mid, n, va_alist) - VALUE recv; - ID mid; - int n; - va_dcl -#endif -{ - va_list ar; - va_init_list(ar, n); - - return vafuncall(recv, mid, n, &ar); -} - -VALUE -#ifdef HAVE_STDARG_PROTOTYPES -rb_funcall_rescue(VALUE recv, ID mid, int n, ...) -#else -rb_funcall_rescue(recv, mid, n, va_alist) - VALUE recv; - ID mid; - int n; - va_dcl -#endif -{ - VALUE result = Qnil; /* OK */ - int status; - va_list ar; - - va_init_list(ar, n); - - PUSH_TAG(PROT_NONE); - if ((status = EXEC_TAG()) == 0) { - result = vafuncall(recv, mid, n, &ar); - } - POP_TAG(); - switch (status) { - case 0: - return result; - case TAG_RAISE: - return Qundef; - default: - JUMP_TAG(status); - } -} - -VALUE -rb_funcall2(recv, mid, argc, argv) - VALUE recv; - ID mid; - int argc; - const VALUE *argv; -{ - return rb_call(CLASS_OF(recv), recv, mid, argc, argv, 1, Qundef); -} - -VALUE -rb_funcall3(recv, mid, argc, argv) - VALUE recv; - ID mid; - int argc; - const VALUE *argv; -{ - return rb_call(CLASS_OF(recv), recv, mid, argc, argv, 0, Qundef); -} - -VALUE -rb_call_super(argc, argv) - int argc; - const VALUE *argv; -{ - VALUE result, self, klass; - - if (ruby_frame->last_class == 0) { - rb_name_error(ruby_frame->last_func, "calling `super' from `%s' is prohibited", - rb_id2name(ruby_frame->orig_func)); - } - - self = ruby_frame->self; - klass = ruby_frame->last_class; - if (RCLASS(klass)->super == 0) { - return method_missing(self, ruby_frame->orig_func, argc, argv, CSTAT_SUPER); - } - - PUSH_ITER(ruby_iter->iter ? ITER_PRE : ITER_NOT); - result = rb_call(RCLASS(klass)->super, self, ruby_frame->orig_func, argc, argv, 3, Qundef); - POP_ITER(); - - return result; -} - -static VALUE -backtrace(lev) - int lev; -{ - struct FRAME *frame = ruby_frame; - char buf[BUFSIZ]; - VALUE ary; - NODE *n; - - ary = rb_ary_new(); - if (frame->last_func == ID_ALLOCATOR) { - frame = frame->prev; - } - if (lev < 0) { - ruby_set_current_source(); - if (frame->last_func) { - snprintf(buf, BUFSIZ, "%s:%d:in `%s'", - ruby_sourcefile, ruby_sourceline, - rb_id2name(frame->last_func)); - } - else if (ruby_sourceline == 0) { - snprintf(buf, BUFSIZ, "%s", ruby_sourcefile); - } - else { - snprintf(buf, BUFSIZ, "%s:%d", ruby_sourcefile, ruby_sourceline); - } - rb_ary_push(ary, rb_str_new2(buf)); - if (lev < -1) return ary; - } - else { - while (lev-- > 0) { - frame = frame->prev; - if (!frame) { - ary = Qnil; - break; - } - } - } - for (; frame && (n = frame->node); frame = frame->prev) { - if (frame->prev && frame->prev->last_func) { - if (frame->prev->node == n) { - if (frame->prev->last_func == frame->last_func) continue; - } - snprintf(buf, BUFSIZ, "%s:%d:in `%s'", - n->nd_file, nd_line(n), - rb_id2name(frame->prev->last_func)); - } - else { - snprintf(buf, BUFSIZ, "%s:%d", n->nd_file, nd_line(n)); - } - rb_ary_push(ary, rb_str_new2(buf)); - } - - return ary; -} - -/* - * call-seq: - * caller(start=1) => array - * - * Returns the current execution stack---an array containing strings in - * the form ``<em>file:line</em>'' or ``<em>file:line: in - * `method'</em>''. The optional _start_ parameter - * determines the number of initial stack entries to omit from the - * result. - * - * def a(skip) - * caller(skip) - * end - * def b(skip) - * a(skip) - * end - * def c(skip) - * b(skip) - * end - * c(0) #=> ["prog:2:in `a'", "prog:5:in `b'", "prog:8:in `c'", "prog:10"] - * c(1) #=> ["prog:5:in `b'", "prog:8:in `c'", "prog:11"] - * c(2) #=> ["prog:8:in `c'", "prog:12"] - * c(3) #=> ["prog:13"] - */ - -static VALUE -rb_f_caller(argc, argv) - int argc; - VALUE *argv; -{ - VALUE level; - int lev; - - rb_scan_args(argc, argv, "01", &level); - - if (NIL_P(level)) lev = 1; - else lev = NUM2INT(level); - if (lev < 0) rb_raise(rb_eArgError, "negative level (%d)", lev); - - return backtrace(lev); -} - -void -rb_backtrace() -{ - long i; - VALUE ary; - - ary = backtrace(-1); - for (i=0; i<RARRAY(ary)->len; i++) { - printf("\tfrom %s\n", RSTRING(RARRAY(ary)->ptr[i])->ptr); - } -} - -static VALUE -make_backtrace() -{ - return backtrace(-1); -} - -ID -rb_frame_last_func() -{ - return ruby_frame->last_func; -} - -static NODE* -compile(src, file, line) - VALUE src; - char *file; - int line; -{ - NODE *node; - int critical; - - ruby_nerrs = 0; - StringValue(src); - critical = rb_thread_critical; - rb_thread_critical = Qtrue; - node = rb_compile_string(file, src, line); - rb_thread_critical = critical; - - if (ruby_nerrs == 0) return node; - return 0; -} - -static VALUE -eval(self, src, scope, file, line) - VALUE self, src, scope; - char *file; - int line; -{ - struct BLOCK *data = NULL; - volatile VALUE result = Qnil; - struct SCOPE * volatile old_scope; - struct BLOCK * volatile old_block; - struct RVarmap * volatile old_dyna_vars; - VALUE volatile old_cref; - int volatile old_vmode; - volatile VALUE old_wrapper; - struct FRAME frame; - NODE *nodesave = ruby_current_node; - volatile int iter = ruby_frame->iter; - volatile int safe = ruby_safe_level; - int state; - - if (!NIL_P(scope)) { - if (!rb_obj_is_proc(scope)) { - rb_raise(rb_eTypeError, "wrong argument type %s (expected Proc/Binding)", - rb_obj_classname(scope)); - } - - Data_Get_Struct(scope, struct BLOCK, data); - /* PUSH BLOCK from data */ - frame = data->frame; - frame.tmp = ruby_frame; /* gc protection */ - ruby_frame = &(frame); - old_scope = ruby_scope; - ruby_scope = data->scope; - old_block = ruby_block; - ruby_block = data->prev; - old_dyna_vars = ruby_dyna_vars; - ruby_dyna_vars = data->dyna_vars; - old_vmode = scope_vmode; - scope_vmode = data->vmode; - old_cref = (VALUE)ruby_cref; - ruby_cref = data->cref; - old_wrapper = ruby_wrapper; - ruby_wrapper = data->wrapper; - if ((file == 0 || (line == 1 && strcmp(file, "(eval)") == 0)) && data->frame.node) { - file = data->frame.node->nd_file; - if (!file) file = "__builtin__"; - line = nd_line(data->frame.node); - } - - self = data->self; - ruby_frame->iter = data->iter; - } - else { - if (ruby_frame->prev) { - ruby_frame->iter = ruby_frame->prev->iter; - } - } - if (file == 0) { - ruby_set_current_source(); - file = ruby_sourcefile; - line = ruby_sourceline; - } - PUSH_CLASS(data ? data->klass : ruby_class); - ruby_in_eval++; - if (TYPE(ruby_class) == T_ICLASS) { - ruby_class = RBASIC(ruby_class)->klass; - } - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - NODE *node; - - ruby_safe_level = 0; - result = ruby_errinfo; - ruby_errinfo = Qnil; - node = compile(src, file, line); - ruby_safe_level = safe; - if (ruby_nerrs > 0) { - compile_error(0); - } - if (!NIL_P(result)) ruby_errinfo = result; - result = eval_node(self, node); - } - POP_TAG(); - POP_CLASS(); - ruby_in_eval--; - if (!NIL_P(scope)) { - int dont_recycle = ruby_scope->flags & SCOPE_DONT_RECYCLE; - - ruby_wrapper = old_wrapper; - ruby_cref = (NODE*)old_cref; - ruby_frame = frame.tmp; - ruby_scope = old_scope; - ruby_block = old_block; - ruby_dyna_vars = old_dyna_vars; - data->vmode = scope_vmode; /* write back visibility mode */ - scope_vmode = old_vmode; - if (dont_recycle) { - struct tag *tag; - struct RVarmap *vars; - - scope_dup(ruby_scope); - for (tag=prot_tag; tag; tag=tag->prev) { - scope_dup(tag->scope); - } - for (vars = ruby_dyna_vars; vars; vars = vars->next) { - FL_SET(vars, DVAR_DONT_RECYCLE); - } - } - } - else { - ruby_frame->iter = iter; - } - ruby_current_node = nodesave; - ruby_set_current_source(); - if (state) { - if (state == TAG_RAISE) { - if (strcmp(file, "(eval)") == 0) { - VALUE mesg, errat, bt2; - - errat = get_backtrace(ruby_errinfo); - mesg = rb_attr_get(ruby_errinfo, rb_intern("mesg")); - if (!NIL_P(errat) && TYPE(errat) == T_ARRAY && - (bt2 = backtrace(-2), RARRAY(bt2)->len > 0)) { - if (!NIL_P(mesg) && TYPE(mesg) == T_STRING) { - rb_str_update(mesg, 0, 0, rb_str_new2(": ")); - rb_str_update(mesg, 0, 0, RARRAY(errat)->ptr[0]); - } - RARRAY(errat)->ptr[0] = RARRAY(bt2)->ptr[0]; - } - } - rb_exc_raise(ruby_errinfo); - } - JUMP_TAG(state); - } - - return result; -} - -/* - * call-seq: - * eval(string [, binding [, filename [,lineno]]]) => obj - * - * Evaluates the Ruby expression(s) in <em>string</em>. If - * <em>binding</em> is given, the evaluation is performed in its - * context. The binding may be a <code>Binding</code> object or a - * <code>Proc</code> object. If the optional <em>filename</em> and - * <em>lineno</em> parameters are present, they will be used when - * reporting syntax errors. - * - * def getBinding(str) - * return binding - * end - * str = "hello" - * eval "str + ' Fred'" #=> "hello Fred" - * eval "str + ' Fred'", getBinding("bye") #=> "bye Fred" - */ - -static VALUE -rb_f_eval(argc, argv, self) - int argc; - VALUE *argv; - VALUE self; -{ - VALUE src, scope, vfile, vline; - char *file = "(eval)"; - int line = 1; - - rb_scan_args(argc, argv, "13", &src, &scope, &vfile, &vline); - if (ruby_safe_level >= 4) { - StringValue(src); - if (!NIL_P(scope) && !OBJ_TAINTED(scope)) { - rb_raise(rb_eSecurityError, "Insecure: can't modify trusted binding"); - } - } - else { - SafeStringValue(src); - } - if (argc >= 3) { - StringValue(vfile); - } - if (argc >= 4) { - line = NUM2INT(vline); - } - - if (!NIL_P(vfile)) file = RSTRING(vfile)->ptr; - if (NIL_P(scope) && ruby_frame->prev) { - struct FRAME *prev; - VALUE val; - - prev = ruby_frame; - PUSH_FRAME(); - *ruby_frame = *prev->prev; - ruby_frame->prev = prev; - val = eval(self, src, scope, file, line); - POP_FRAME(); - - return val; - } - return eval(self, src, scope, file, line); -} - -/* function to call func under the specified class/module context */ -static VALUE -exec_under(func, under, cbase, args) - VALUE (*func)(); - VALUE under, cbase; - void *args; -{ - VALUE val = Qnil; /* OK */ - int state; - int mode; - struct FRAME *f = ruby_frame; - - PUSH_CLASS(under); - PUSH_FRAME(); - ruby_frame->self = f->self; - ruby_frame->last_func = f->last_func; - ruby_frame->orig_func = f->orig_func; - ruby_frame->last_class = f->last_class; - ruby_frame->argc = f->argc; - if (cbase) { - PUSH_CREF(cbase); - } - - mode = scope_vmode; - SCOPE_SET(SCOPE_PUBLIC); - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - val = (*func)(args); - } - POP_TAG(); - if (cbase) POP_CREF(); - SCOPE_SET(mode); - POP_FRAME(); - POP_CLASS(); - if (state) JUMP_TAG(state); - - return val; -} - -static VALUE -eval_under_i(args) - VALUE *args; -{ - struct FRAME *f = ruby_frame; - - if (f && (f = f->prev) && (f = f->prev)) { - ruby_frame = f; - } - return eval(args[0], args[1], Qnil, (char*)args[2], (int)args[3]); -} - -/* string eval under the class/module context */ -static VALUE -eval_under(under, self, src, file, line) - VALUE under, self, src; - const char *file; - int line; -{ - VALUE args[4]; - - if (ruby_safe_level >= 4) { - StringValue(src); - } - else { - SafeStringValue(src); - } - args[0] = self; - args[1] = src; - args[2] = (VALUE)file; - args[3] = (VALUE)line; - return exec_under(eval_under_i, under, under, args); -} - -static VALUE -yield_under_i(self) - VALUE self; -{ - return rb_yield_0(self, self, ruby_class, YIELD_PUBLIC_DEF, Qfalse); -} - -/* block eval under the class/module context */ -static VALUE -yield_under(under, self) - VALUE under, self; -{ - return exec_under(yield_under_i, under, 0, self); -} - -static VALUE -specific_eval(argc, argv, klass, self) - int argc; - VALUE *argv; - VALUE klass, self; -{ - if (rb_block_given_p()) { - if (argc > 0) { - rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", argc); - } - return yield_under(klass, self); - } - else { - char *file = "(eval)"; - int line = 1; - - if (argc == 0) { - rb_raise(rb_eArgError, "block not supplied"); - } - else { - if (ruby_safe_level >= 4) { - StringValue(argv[0]); - } - else { - SafeStringValue(argv[0]); - } - if (argc > 3) { - rb_raise(rb_eArgError, "wrong number of arguments: %s(src) or %s{..}", - rb_id2name(ruby_frame->last_func), - rb_id2name(ruby_frame->last_func)); - } - if (argc > 2) line = NUM2INT(argv[2]); - if (argc > 1) { - file = StringValuePtr(argv[1]); - } - } - return eval_under(klass, self, argv[0], file, line); - } -} - -/* - * call-seq: - * obj.instance_eval(string [, filename [, lineno]] ) => obj - * obj.instance_eval {| | block } => obj - * - * Evaluates a string containing Ruby source code, or the given block, - * within the context of the receiver (_obj_). In order to set the - * context, the variable +self+ is set to _obj_ while - * the code is executing, giving the code access to _obj_'s - * instance variables. In the version of <code>instance_eval</code> - * that takes a +String+, the optional second and third - * parameters supply a filename and starting line number that are used - * when reporting compilation errors. - * - * class Klass - * def initialize - * @secret = 99 - * end - * end - * k = Klass.new - * k.instance_eval { @secret } #=> 99 - */ - -VALUE -rb_obj_instance_eval(argc, argv, self) - int argc; - VALUE *argv; - VALUE self; -{ - VALUE klass; - - if (SPECIAL_CONST_P(self)) { - klass = Qnil; - } - else { - klass = rb_singleton_class(self); - } - return specific_eval(argc, argv, klass, self); -} - -/* - * call-seq: - * mod.class_eval(string [, filename [, lineno]]) => obj - * mod.module_eval {|| block } => obj - * - * Evaluates the string or block in the context of _mod_. This can - * be used to add methods to a class. <code>module_eval</code> returns - * the result of evaluating its argument. The optional _filename_ - * and _lineno_ parameters set the text for error messages. - * - * class Thing - * end - * a = %q{def hello() "Hello there!" end} - * Thing.module_eval(a) - * puts Thing.new.hello() - * Thing.module_eval("invalid code", "dummy", 123) - * - * <em>produces:</em> - * - * Hello there! - * dummy:123:in `module_eval': undefined local variable - * or method `code' for Thing:Class - */ - -VALUE -rb_mod_module_eval(argc, argv, mod) - int argc; - VALUE *argv; - VALUE mod; -{ - return specific_eval(argc, argv, mod, mod); -} - -VALUE rb_load_path; - -NORETURN(static void load_failed _((VALUE))); - -void -rb_load(fname, wrap) - VALUE fname; - int wrap; -{ - VALUE tmp; - int state; - volatile int prohibit_int = rb_prohibit_interrupt; - volatile ID last_func; - volatile VALUE wrapper = ruby_wrapper; - volatile VALUE self = ruby_top_self; - NODE *volatile last_node; - NODE *saved_cref = ruby_cref; - - if (wrap && ruby_safe_level >= 4) { - StringValue(fname); - } - else { - SafeStringValue(fname); - } - fname = rb_str_new4(fname); - tmp = rb_find_file(fname); - if (!tmp) { - load_failed(fname); - } - fname = tmp; - - ruby_errinfo = Qnil; /* ensure */ - PUSH_VARS(); - PUSH_CLASS(ruby_wrapper); - ruby_cref = ruby_top_cref; - if (!wrap) { - rb_secure(4); /* should alter global state */ - ruby_class = rb_cObject; - ruby_wrapper = 0; - } - else { - /* load in anonymous module as toplevel */ - ruby_class = ruby_wrapper = rb_module_new(); - self = rb_obj_clone(ruby_top_self); - rb_extend_object(self, ruby_wrapper); - PUSH_CREF(ruby_wrapper); - } - PUSH_ITER(ITER_NOT); - PUSH_FRAME(); - ruby_frame->last_func = 0; - ruby_frame->last_class = 0; - ruby_frame->self = self; - PUSH_SCOPE(); - /* default visibility is private at loading toplevel */ - SCOPE_SET(SCOPE_PRIVATE); - PUSH_TAG(PROT_NONE); - state = EXEC_TAG(); - last_func = ruby_frame->last_func; - last_node = ruby_current_node; - if (!ruby_current_node && ruby_sourcefile) { - last_node = NEW_NEWLINE(0); - } - ruby_current_node = 0; - if (state == 0) { - NODE *node; - volatile int critical; - - DEFER_INTS; - ruby_in_eval++; - critical = rb_thread_critical; - rb_thread_critical = Qtrue; - rb_load_file(RSTRING(fname)->ptr); - ruby_in_eval--; - node = ruby_eval_tree; - rb_thread_critical = critical; - ALLOW_INTS; - if (ruby_nerrs == 0) { - eval_node(self, node); - } - } - ruby_frame->last_func = last_func; - ruby_current_node = last_node; - ruby_sourcefile = 0; - ruby_set_current_source(); - if (ruby_scope->flags == SCOPE_ALLOCA && ruby_class == rb_cObject) { - if (ruby_scope->local_tbl) /* toplevel was empty */ - free(ruby_scope->local_tbl); - } - POP_TAG(); - rb_prohibit_interrupt = prohibit_int; - ruby_cref = saved_cref; - POP_SCOPE(); - POP_FRAME(); - POP_ITER(); - POP_CLASS(); - POP_VARS(); - ruby_wrapper = wrapper; - if (ruby_nerrs > 0) { - ruby_nerrs = 0; - rb_exc_raise(ruby_errinfo); - } - if (state) jump_tag_but_local_jump(state, Qundef); - if (!NIL_P(ruby_errinfo)) /* exception during load */ - rb_exc_raise(ruby_errinfo); -} - -void -rb_load_protect(fname, wrap, state) - VALUE fname; - int wrap; - int *state; -{ - int status; - - PUSH_TAG(PROT_NONE); - if ((status = EXEC_TAG()) == 0) { - rb_load(fname, wrap); - } - POP_TAG(); - if (state) *state = status; -} - -/* - * call-seq: - * load(filename, wrap=false) => true - * - * Loads and executes the Ruby - * program in the file _filename_. If the filename does not - * resolve to an absolute path, the file is searched for in the library - * directories listed in <code>$:</code>. If the optional _wrap_ - * parameter is +true+, the loaded script will be executed - * under an anonymous module, protecting the calling program's global - * namespace. In no circumstance will any local variables in the loaded - * file be propagated to the loading environment. - */ - - -static VALUE -rb_f_load(argc, argv) - int argc; - VALUE *argv; -{ - VALUE fname, wrap; - - rb_scan_args(argc, argv, "11", &fname, &wrap); - rb_load(fname, RTEST(wrap)); - return Qtrue; -} - -VALUE ruby_dln_librefs; -static VALUE rb_features; -static st_table *loading_tbl; - -#define IS_SOEXT(e) (strcmp(e, ".so") == 0 || strcmp(e, ".o") == 0) -#ifdef DLEXT2 -#define IS_DLEXT(e) (strcmp(e, DLEXT) == 0 || strcmp(e, DLEXT2) == 0) -#else -#define IS_DLEXT(e) (strcmp(e, DLEXT) == 0) -#endif - - -static const char *const loadable_ext[] = { - ".rb", DLEXT, -#ifdef DLEXT2 - DLEXT2, -#endif - 0 -}; - -static int rb_feature_p _((const char *, const char *, int)); -static int search_required _((VALUE, VALUE *, VALUE *)); - -static int -rb_feature_p(feature, ext, rb) - const char *feature, *ext; - int rb; -{ - VALUE v; - const char *f, *e; - long i, len, elen; - - if (ext) { - len = ext - feature; - elen = strlen(ext); - } - else { - len = strlen(feature); - elen = 0; - } - for (i = 0; i < RARRAY_LEN(rb_features); ++i) { - v = RARRAY_PTR(rb_features)[i]; - f = StringValuePtr(v); - if (RSTRING_LEN(v) < len || strncmp(f, feature, len) != 0) - continue; - if (!*(e = f + len)) { - if (ext) continue; - return 'u'; - } - if (*e != '.') continue; - if ((!rb || !ext) && (IS_SOEXT(e) || IS_DLEXT(e))) { - return 's'; - } - if ((rb || !ext) && (strcmp(e, ".rb") == 0)) { - return 'r'; - } - } - if (loading_tbl) { - if (st_lookup(loading_tbl, (st_data_t)feature, 0)) { - if (!ext) return 'u'; - return strcmp(ext, ".rb") ? 's' : 'r'; - } - else { - char *buf; - - if (ext && *ext) return 0; - buf = ALLOCA_N(char, len + DLEXT_MAXLEN + 1); - MEMCPY(buf, feature, char, len); - for (i = 0; (e = loadable_ext[i]) != 0; i++) { - strncpy(buf + len, e, DLEXT_MAXLEN + 1); - if (st_lookup(loading_tbl, (st_data_t)buf, 0)) { - return i ? 's' : 'r'; - } - } - } - } - return 0; -} - -int -rb_provided(feature) - const char *feature; -{ - const char *ext = strrchr(feature, '.'); - - if (ext && !strchr(ext, '/')) { - if (strcmp(".rb", ext) == 0) { - if (rb_feature_p(feature, ext, Qtrue)) return Qtrue; - return Qfalse; - } - else if (IS_SOEXT(ext) || IS_DLEXT(ext)) { - if (rb_feature_p(feature, ext, Qfalse)) return Qtrue; - return Qfalse; - } - } - if (rb_feature_p(feature, feature + strlen(feature), Qtrue)) - return Qtrue; - - return Qfalse; -} - -static void -rb_provide_feature(feature) - VALUE feature; -{ - rb_ary_push(rb_features, feature); -} - -void -rb_provide(feature) - const char *feature; -{ - rb_provide_feature(rb_str_new2(feature)); -} - -static char * -load_lock(ftptr) - const char *ftptr; -{ - st_data_t th; - - if (!loading_tbl || - !st_lookup(loading_tbl, (st_data_t)ftptr, &th)) - { - /* loading ruby library should be serialized. */ - if (!loading_tbl) { - loading_tbl = st_init_strtable(); - } - /* partial state */ - ftptr = ruby_strdup(ftptr); - st_insert(loading_tbl, (st_data_t)ftptr, (st_data_t)curr_thread); - return (char *)ftptr; - } - do { - if ((rb_thread_t)th == curr_thread) return 0; - CHECK_INTS; - } while (st_lookup(loading_tbl, (st_data_t)ftptr, &th)); - return 0; -} - -static void -load_unlock(const char *ftptr) -{ - if (ftptr) { - st_data_t key = (st_data_t)ftptr; - - if (st_delete(loading_tbl, &key, 0)) { - free((char *)key); - } - } -} - -/* - * call-seq: - * require(string) => true or false - * - * Ruby tries to load the library named _string_, returning - * +true+ if successful. If the filename does not resolve to - * an absolute path, it will be searched for in the directories listed - * in <code>$:</code>. If the file has the extension ``.rb'', it is - * loaded as a source file; if the extension is ``.so'', ``.o'', or - * ``.dll'', or whatever the default shared library extension is on - * the current platform, Ruby loads the shared library as a Ruby - * extension. Otherwise, Ruby tries adding ``.rb'', ``.so'', and so on - * to the name. The name of the loaded feature is added to the array in - * <code>$"</code>. A feature will not be loaded if it's name already - * appears in <code>$"</code>. However, the file name is not converted - * to an absolute path, so that ``<code>require 'a';require - * './a'</code>'' will load <code>a.rb</code> twice. - * - * require "my-library.rb" - * require "db-driver" - */ - -VALUE -rb_f_require(obj, fname) - VALUE obj, fname; -{ - return rb_require_safe(fname, ruby_safe_level); -} - -static int -search_required(fname, featurep, path) - VALUE fname, *featurep, *path; -{ - VALUE tmp; - char *ext, *ftptr; - int type; - - *featurep = fname; - *path = 0; - ext = strrchr(ftptr = RSTRING_PTR(fname), '.'); - if (ext && !strchr(ext, '/')) { - if (strcmp(".rb", ext) == 0) { - if (rb_feature_p(ftptr, ext, Qtrue)) return 'r'; - if ((*path = rb_find_file(fname)) != 0) return 'r'; - return 0; - } - else if (IS_SOEXT(ext)) { - if (rb_feature_p(ftptr, ext, Qfalse)) return 's'; - tmp = rb_str_new(RSTRING_PTR(fname), ext-RSTRING_PTR(fname)); - *featurep = tmp; -#ifdef DLEXT2 - OBJ_FREEZE(tmp); - if (rb_find_file_ext(&tmp, loadable_ext+1)) { - *featurep = tmp; - *path = rb_find_file(tmp); - return 's'; - } -#else - rb_str_cat2(tmp, DLEXT); - OBJ_FREEZE(tmp); - if ((*path = rb_find_file(tmp)) != 0) { - return 's'; - } -#endif - } - else if (IS_DLEXT(ext)) { - if (rb_feature_p(ftptr, ext, Qfalse)) return 's'; - if ((*path = rb_find_file(fname)) != 0) return 's'; - } - } - tmp = fname; - type = rb_find_file_ext(&tmp, loadable_ext); - *featurep = tmp; - switch (type) { - case 0: - ftptr = RSTRING_PTR(tmp); - return rb_feature_p(ftptr, 0, Qfalse); - - default: - ext = strrchr(ftptr = RSTRING(tmp)->ptr, '.'); - if (rb_feature_p(ftptr, ext, !--type)) break; - *path = rb_find_file(tmp); - } - return type ? 's' : 'r'; -} - -static void -load_failed(fname) - VALUE fname; -{ - rb_raise(rb_eLoadError, "no such file to load -- %s", RSTRING(fname)->ptr); -} - -VALUE -rb_require_safe(fname, safe) - VALUE fname; - int safe; -{ - VALUE result = Qnil; - volatile VALUE errinfo = ruby_errinfo; - int state; - struct { - NODE *node; - ID func; - int vmode, safe; - } volatile saved; - char *volatile ftptr = 0; - - if (OBJ_TAINTED(fname)) { - rb_check_safe_obj(fname); - } - StringValue(fname); - fname = rb_str_new4(fname); - saved.vmode = scope_vmode; - saved.node = ruby_current_node; - saved.func = ruby_frame->last_func; - saved.safe = ruby_safe_level; - PUSH_TAG(PROT_NONE); - if ((state = EXEC_TAG()) == 0) { - VALUE feature, path; - long handle; - int found; - - ruby_safe_level = safe; - found = search_required(fname, &feature, &path); - if (found) { - if (!path || !(ftptr = load_lock(RSTRING_PTR(feature)))) { - result = Qfalse; - } - else { - ruby_safe_level = 0; - switch (found) { - case 'r': - rb_load(path, 0); - break; - - case 's': - ruby_current_node = 0; - ruby_sourcefile = rb_source_filename(RSTRING(path)->ptr); - ruby_sourceline = 0; - ruby_frame->last_func = 0; - SCOPE_SET(SCOPE_PUBLIC); - handle = (long)dln_load(RSTRING(path)->ptr); - rb_ary_push(ruby_dln_librefs, LONG2NUM(handle)); - break; - } - rb_provide_feature(feature); - result = Qtrue; - } - } - } - POP_TAG(); - ruby_current_node = saved.node; - ruby_set_current_source(); - ruby_frame->last_func = saved.func; - SCOPE_SET(saved.vmode); - ruby_safe_level = saved.safe; - load_unlock(ftptr); - if (state) JUMP_TAG(state); - if (NIL_P(result)) { - load_failed(fname); - } - ruby_errinfo = errinfo; - - return result; -} - -VALUE -rb_require(fname) - const char *fname; -{ - VALUE fn = rb_str_new2(fname); - OBJ_FREEZE(fn); - return rb_require_safe(fn, ruby_safe_level); -} - -void -ruby_init_ext(name, init) - const char *name; - void (*init) _((void)); -{ - ruby_current_node = 0; - ruby_sourcefile = rb_source_filename(name); - ruby_sourceline = 0; - ruby_frame->last_func = 0; - ruby_frame->orig_func = 0; - SCOPE_SET(SCOPE_PUBLIC); - if (load_lock(name)) { - (*init)(); - rb_provide(name); - load_unlock(name); - } -} - -static void -secure_visibility(self) - VALUE self; -{ - if (ruby_safe_level >= 4 && !OBJ_TAINTED(self)) { - rb_raise(rb_eSecurityError, "Insecure: can't change method visibility"); - } -} - -static void -set_method_visibility(self, argc, argv, ex) - VALUE self; - int argc; - VALUE *argv; - ID ex; -{ - int i; - - secure_visibility(self); - for (i=0; i<argc; i++) { - rb_export_method(self, rb_to_id(argv[i]), ex); - } - rb_clear_cache_by_class(self); -} - -/* - * call-seq: - * public => self - * public(symbol, ...) => self - * - * With no arguments, sets the default visibility for subsequently - * defined methods to public. With arguments, sets the named methods to - * have public visibility. - */ - -static VALUE -rb_mod_public(argc, argv, module) - int argc; - VALUE *argv; - VALUE module; -{ - secure_visibility(module); - if (argc == 0) { - SCOPE_SET(SCOPE_PUBLIC); - } - else { - set_method_visibility(module, argc, argv, NOEX_PUBLIC); - } - return module; -} - -/* - * call-seq: - * protected => self - * protected(symbol, ...) => self - * - * With no arguments, sets the default visibility for subsequently - * defined methods to protected. With arguments, sets the named methods - * to have protected visibility. - */ - -static VALUE -rb_mod_protected(argc, argv, module) - int argc; - VALUE *argv; - VALUE module; -{ - secure_visibility(module); - if (argc == 0) { - SCOPE_SET(SCOPE_PROTECTED); - } - else { - set_method_visibility(module, argc, argv, NOEX_PROTECTED); - } - return module; -} - -/* - * call-seq: - * private => self - * private(symbol, ...) => self - * - * With no arguments, sets the default visibility for subsequently - * defined methods to private. With arguments, sets the named methods - * to have private visibility. - * - * module Mod - * def a() end - * def b() end - * private - * def c() end - * private :a - * end - * Mod.private_instance_methods #=> ["a", "c"] - */ - -static VALUE -rb_mod_private(argc, argv, module) - int argc; - VALUE *argv; - VALUE module; -{ - secure_visibility(module); - if (argc == 0) { - SCOPE_SET(SCOPE_PRIVATE); - } - else { - set_method_visibility(module, argc, argv, NOEX_PRIVATE); - } - return module; -} - -/* - * call-seq: - * mod.public_class_method(symbol, ...) => mod - * - * Makes a list of existing class methods public. - */ - -static VALUE -rb_mod_public_method(argc, argv, obj) - int argc; - VALUE *argv; - VALUE obj; -{ - set_method_visibility(CLASS_OF(obj), argc, argv, NOEX_PUBLIC); - return obj; -} - -/* - * call-seq: - * mod.private_class_method(symbol, ...) => mod - * - * Makes existing class methods private. Often used to hide the default - * constructor <code>new</code>. - * - * class SimpleSingleton # Not thread safe - * private_class_method :new - * def SimpleSingleton.create(*args, &block) - * @me = new(*args, &block) if ! @me - * @me - * end - * end - */ - -static VALUE -rb_mod_private_method(argc, argv, obj) - int argc; - VALUE *argv; - VALUE obj; -{ - set_method_visibility(CLASS_OF(obj), argc, argv, NOEX_PRIVATE); - return obj; -} - -/* - * call-seq: - * public - * public(symbol, ...) - * - * With no arguments, sets the default visibility for subsequently - * defined methods to public. With arguments, sets the named methods to - * have public visibility. - */ - -static VALUE -top_public(argc, argv) - int argc; - VALUE *argv; -{ - return rb_mod_public(argc, argv, rb_cObject); -} - -static VALUE -top_private(argc, argv) - int argc; - VALUE *argv; -{ - return rb_mod_private(argc, argv, rb_cObject); -} - -/* - * call-seq: - * module_function(symbol, ...) => self - * - * Creates module functions for the named methods. These functions may - * be called with the module as a receiver, and also become available - * as instance methods to classes that mix in the module. Module - * functions are copies of the original, and so may be changed - * independently. The instance-method versions are made private. If - * used with no arguments, subsequently defined methods become module - * functions. - * - * module Mod - * def one - * "This is one" - * end - * module_function :one - * end - * class Cls - * include Mod - * def callOne - * one - * end - * end - * Mod.one #=> "This is one" - * c = Cls.new - * c.callOne #=> "This is one" - * module Mod - * def one - * "This is the new one" - * end - * end - * Mod.one #=> "This is one" - * c.callOne #=> "This is the new one" - */ - -static VALUE -rb_mod_modfunc(argc, argv, module) - int argc; - VALUE *argv; - VALUE module; -{ - int i; - ID id; - NODE *body; - - if (TYPE(module) != T_MODULE) { - rb_raise(rb_eTypeError, "module_function must be called for modules"); - } - - secure_visibility(module); - if (argc == 0) { - SCOPE_SET(SCOPE_MODFUNC); - return module; - } - - set_method_visibility(module, argc, argv, NOEX_PRIVATE); - for (i=0; i<argc; i++) { - VALUE m = module; - - id = rb_to_id(argv[i]); - for (;;) { - body = search_method(m, id, &m); - if (body == 0) { - body = search_method(rb_cObject, id, &m); - } - if (body == 0 || body->nd_body == 0) { - rb_bug("undefined method `%s'; can't happen", rb_id2name(id)); - } - if (nd_type(body->nd_body) != NODE_ZSUPER) { - break; /* normal case: need not to follow 'super' link */ - } - m = RCLASS(m)->super; - if (!m) break; - } - rb_add_method(rb_singleton_class(module), id, body->nd_body, NOEX_PUBLIC); - } - return module; -} - -/* - * call-seq: - * append_features(mod) => mod - * - * When this module is included in another, Ruby calls - * <code>append_features</code> in this module, passing it the - * receiving module in _mod_. Ruby's default implementation is - * to add the constants, methods, and module variables of this module - * to _mod_ if this module has not already been added to - * _mod_ or one of its ancestors. See also <code>Module#include</code>. - */ - -static VALUE -rb_mod_append_features(module, include) - VALUE module, include; -{ - switch (TYPE(include)) { - case T_CLASS: - case T_MODULE: - break; - default: - Check_Type(include, T_CLASS); - break; - } - rb_include_module(include, module); - - return module; -} - -/* - * call-seq: - * include(module, ...) => self - * - * Invokes <code>Module.append_features</code> on each parameter in turn. - */ - -static VALUE -rb_mod_include(argc, argv, module) - int argc; - VALUE *argv; - VALUE module; -{ - int i; - - for (i=0; i<argc; i++) Check_Type(argv[i], T_MODULE); - while (argc--) { - rb_funcall(argv[argc], rb_intern("append_features"), 1, module); - rb_funcall(argv[argc], rb_intern("included"), 1, module); - } - return module; -} - -void -rb_obj_call_init(obj, argc, argv) - VALUE obj; - int argc; - VALUE *argv; -{ - PUSH_ITER(rb_block_given_p()?ITER_PRE:ITER_NOT); - rb_funcall2(obj, init, argc, argv); - POP_ITER(); -} - -void -rb_extend_object(obj, module) - VALUE obj, module; -{ - rb_include_module(rb_singleton_class(obj), module); -} - -/* - * call-seq: - * extend_object(obj) => obj - * - * Extends the specified object by adding this module's constants and - * methods (which are added as singleton methods). This is the callback - * method used by <code>Object#extend</code>. - * - * module Picky - * def Picky.extend_object(o) - * if String === o - * puts "Can't add Picky to a String" - * else - * puts "Picky added to #{o.class}" - * super - * end - * end - * end - * (s = Array.new).extend Picky # Call Object.extend - * (s = "quick brown fox").extend Picky - * - * <em>produces:</em> - * - * Picky added to Array - * Can't add Picky to a String - */ - -static VALUE -rb_mod_extend_object(mod, obj) - VALUE mod, obj; -{ - rb_extend_object(obj, mod); - return obj; -} - -/* - * call-seq: - * obj.extend(module, ...) => obj - * - * Adds to _obj_ the instance methods from each module given as a - * parameter. - * - * module Mod - * def hello - * "Hello from Mod.\n" - * end - * end - * - * class Klass - * def hello - * "Hello from Klass.\n" - * end - * end - * - * k = Klass.new - * k.hello #=> "Hello from Klass.\n" - * k.extend(Mod) #=> #<Klass:0x401b3bc8> - * k.hello #=> "Hello from Mod.\n" - */ - -static VALUE -rb_obj_extend(argc, argv, obj) - int argc; - VALUE *argv; - VALUE obj; -{ - int i; - - if (argc == 0) { - rb_raise(rb_eArgError, "wrong number of arguments (0 for 1)"); - } - for (i=0; i<argc; i++) Check_Type(argv[i], T_MODULE); - while (argc--) { - rb_funcall(argv[argc], rb_intern("extend_object"), 1, obj); - rb_funcall(argv[argc], rb_intern("extended"), 1, obj); - } - return obj; -} - -/* - * call-seq: - * include(module, ...) => self - * - * Invokes <code>Module.append_features</code> - * on each parameter in turn. Effectively adds the methods and constants - * in each module to the receiver. - */ - -static VALUE -top_include(argc, argv, self) - int argc; - VALUE *argv; - VALUE self; -{ - rb_secure(4); - if (ruby_wrapper) { - rb_warning("main#include in the wrapped load is effective only in wrapper module"); - return rb_mod_include(argc, argv, ruby_wrapper); - } - return rb_mod_include(argc, argv, rb_cObject); -} - -VALUE rb_f_trace_var(); -VALUE rb_f_untrace_var(); - -static void -errinfo_setter(val, id, var) - VALUE val; - ID id; - VALUE *var; -{ - if (!NIL_P(val) && !rb_obj_is_kind_of(val, rb_eException)) { - rb_raise(rb_eTypeError, "assigning non-exception to $!"); - } - *var = val; -} - -static VALUE -errat_getter(id) - ID id; -{ - return get_backtrace(ruby_errinfo); -} - -static void -errat_setter(val, id, var) - VALUE val; - ID id; - VALUE *var; -{ - if (NIL_P(ruby_errinfo)) { - rb_raise(rb_eArgError, "$! not set"); - } - set_backtrace(ruby_errinfo, val); -} - -/* - * call-seq: - * local_variables => array - * - * Returns the names of the current local variables. - * - * fred = 1 - * for i in 1..10 - * # ... - * end - * local_variables #=> ["fred", "i"] - */ - -static VALUE -rb_f_local_variables() -{ - ID *tbl; - int n, i; - VALUE ary = rb_ary_new(); - struct RVarmap *vars; - - tbl = ruby_scope->local_tbl; - if (tbl) { - n = *tbl++; - for (i=2; i<n; i++) { /* skip first 2 ($_ and $~) */ - if (!rb_is_local_id(tbl[i])) continue; /* skip flip states */ - rb_ary_push(ary, rb_str_new2(rb_id2name(tbl[i]))); - } - } - - vars = ruby_dyna_vars; - while (vars) { - if (vars->id && rb_is_local_id(vars->id)) { /* skip $_, $~ and flip states */ - rb_ary_push(ary, rb_str_new2(rb_id2name(vars->id))); - } - vars = vars->next; - } - - return ary; -} - -static VALUE rb_f_catch _((VALUE,VALUE)); -NORETURN(static VALUE rb_f_throw _((int,VALUE*))); - -struct end_proc_data { - void (*func)(); - VALUE data; - int safe; - struct end_proc_data *next; -}; - -static struct end_proc_data *end_procs, *ephemeral_end_procs, *tmp_end_procs; - -void -rb_set_end_proc(func, data) - void (*func) _((VALUE)); - VALUE data; -{ - struct end_proc_data *link = ALLOC(struct end_proc_data); - struct end_proc_data **list; - - if (ruby_wrapper) list = &ephemeral_end_procs; - else list = &end_procs; - link->next = *list; - link->func = func; - link->data = data; - link->safe = ruby_safe_level; - *list = link; -} - -void -rb_mark_end_proc() -{ - struct end_proc_data *link; - - link = end_procs; - while (link) { - rb_gc_mark(link->data); - link = link->next; - } - link = ephemeral_end_procs; - while (link) { - rb_gc_mark(link->data); - link = link->next; - } - link = tmp_end_procs; - while (link) { - rb_gc_mark(link->data); - link = link->next; - } -} - -static void call_end_proc _((VALUE data)); - -static void -call_end_proc(data) - VALUE data; -{ - PUSH_ITER(ITER_NOT); - PUSH_FRAME(); - ruby_frame->self = ruby_frame->prev->self; - ruby_frame->node = 0; - ruby_frame->last_func = 0; - ruby_frame->last_class = 0; - proc_invoke(data, rb_ary_new2(0), Qundef, 0); - POP_FRAME(); - POP_ITER(); -} - -static void -rb_f_END() -{ - PUSH_FRAME(); - ruby_frame->argc = 0; - ruby_frame->iter = ITER_CUR; - rb_set_end_proc(call_end_proc, rb_block_proc()); - POP_FRAME(); -} - -/* - * call-seq: - * at_exit { block } -> proc - * - * Converts _block_ to a +Proc+ object (and therefore - * binds it at the point of call) and registers it for execution when - * the program exits. If multiple handlers are registered, they are - * executed in reverse order of registration. - * - * def do_at_exit(str1) - * at_exit { print str1 } - * end - * at_exit { puts "cruel world" } - * do_at_exit("goodbye ") - * exit - * - * <em>produces:</em> - * - * goodbye cruel world - */ - -static VALUE -rb_f_at_exit() -{ - VALUE proc; - - if (!rb_block_given_p()) { - rb_raise(rb_eArgError, "called without a block"); - } - proc = rb_block_proc(); - rb_set_end_proc(call_end_proc, proc); - return proc; -} - -void -rb_exec_end_proc() -{ - struct end_proc_data *link, *tmp; - int status; - volatile int safe = ruby_safe_level; - - while (ephemeral_end_procs) { - tmp_end_procs = link = ephemeral_end_procs; - ephemeral_end_procs = 0; - while (link) { - PUSH_TAG(PROT_NONE); - if ((status = EXEC_TAG()) == 0) { - ruby_safe_level = link->safe; - (*link->func)(link->data); - } - POP_TAG(); - if (status) { - error_handle(status); - } - tmp = link; - tmp_end_procs = link = link->next; - free(tmp); - } - } - while (end_procs) { - tmp_end_procs = link = end_procs; - end_procs = 0; - while (link) { - PUSH_TAG(PROT_NONE); - if ((status = EXEC_TAG()) == 0) { - ruby_safe_level = link->safe; - (*link->func)(link->data); - } - POP_TAG(); - if (status) { - error_handle(status); - } - tmp = link; - tmp_end_procs = link = link->next; - free(tmp); - } - } - ruby_safe_level = safe; -} - -void -Init_eval() -{ - init = rb_intern("initialize"); - eqq = rb_intern("==="); - each = rb_intern("each"); - - aref = rb_intern("[]"); - aset = rb_intern("[]="); - match = rb_intern("=~"); - missing = rb_intern("method_missing"); - added = rb_intern("method_added"); - singleton_added = rb_intern("singleton_method_added"); - removed = rb_intern("method_removed"); - singleton_removed = rb_intern("singleton_method_removed"); - undefined = rb_intern("method_undefined"); - singleton_undefined = rb_intern("singleton_method_undefined"); - - __id__ = rb_intern("__id__"); - __send__ = rb_intern("__send__"); - - rb_global_variable((void *)&top_scope); - rb_global_variable((void *)&ruby_eval_tree_begin); - - rb_global_variable((void *)&ruby_eval_tree); - rb_global_variable((void *)&ruby_dyna_vars); - - rb_define_virtual_variable("$@", errat_getter, errat_setter); - rb_define_hooked_variable("$!", &ruby_errinfo, 0, errinfo_setter); - - rb_define_global_function("eval", rb_f_eval, -1); - rb_define_global_function("iterator?", rb_f_block_given_p, 0); - rb_define_global_function("block_given?", rb_f_block_given_p, 0); - rb_define_global_function("method_missing", rb_method_missing, -1); - rb_define_global_function("loop", rb_f_loop, 0); - - rb_define_method(rb_mKernel, "respond_to?", obj_respond_to, -1); - respond_to = rb_intern("respond_to?"); - rb_global_variable((void *)&basic_respond_to); - basic_respond_to = rb_method_node(rb_cObject, respond_to); - - rb_define_global_function("raise", rb_f_raise, -1); - rb_define_global_function("fail", rb_f_raise, -1); - - rb_define_global_function("caller", rb_f_caller, -1); - - rb_define_global_function("exit", rb_f_exit, -1); - rb_define_global_function("abort", rb_f_abort, -1); - - rb_define_global_function("at_exit", rb_f_at_exit, 0); - - rb_define_global_function("catch", rb_f_catch, 1); - rb_define_global_function("throw", rb_f_throw, -1); - rb_define_global_function("global_variables", rb_f_global_variables, 0); /* in variable.c */ - rb_define_global_function("local_variables", rb_f_local_variables, 0); - - rb_define_method(rb_mKernel, "send", rb_f_send, -1); - rb_define_method(rb_mKernel, "__send__", rb_f_send, -1); - rb_define_method(rb_mKernel, "instance_eval", rb_obj_instance_eval, -1); - - rb_define_private_method(rb_cModule, "append_features", rb_mod_append_features, 1); - rb_define_private_method(rb_cModule, "extend_object", rb_mod_extend_object, 1); - rb_define_private_method(rb_cModule, "include", rb_mod_include, -1); - rb_define_private_method(rb_cModule, "public", rb_mod_public, -1); - rb_define_private_method(rb_cModule, "protected", rb_mod_protected, -1); - rb_define_private_method(rb_cModule, "private", rb_mod_private, -1); - rb_define_private_method(rb_cModule, "module_function", rb_mod_modfunc, -1); - rb_define_method(rb_cModule, "method_defined?", rb_mod_method_defined, 1); - rb_define_method(rb_cModule, "public_method_defined?", rb_mod_public_method_defined, 1); - rb_define_method(rb_cModule, "private_method_defined?", rb_mod_private_method_defined, 1); - rb_define_method(rb_cModule, "protected_method_defined?", rb_mod_protected_method_defined, 1); - rb_define_method(rb_cModule, "public_class_method", rb_mod_public_method, -1); - rb_define_method(rb_cModule, "private_class_method", rb_mod_private_method, -1); - rb_define_method(rb_cModule, "module_eval", rb_mod_module_eval, -1); - rb_define_method(rb_cModule, "class_eval", rb_mod_module_eval, -1); - - rb_undef_method(rb_cClass, "module_function"); - - rb_define_private_method(rb_cModule, "remove_method", rb_mod_remove_method, -1); - rb_define_private_method(rb_cModule, "undef_method", rb_mod_undef_method, -1); - rb_define_private_method(rb_cModule, "alias_method", rb_mod_alias_method, 2); - rb_define_private_method(rb_cModule, "define_method", rb_mod_define_method, -1); - - rb_define_singleton_method(rb_cModule, "nesting", rb_mod_nesting, 0); - rb_define_singleton_method(rb_cModule, "constants", rb_mod_s_constants, 0); - - rb_define_singleton_method(ruby_top_self, "include", top_include, -1); - rb_define_singleton_method(ruby_top_self, "public", top_public, -1); - rb_define_singleton_method(ruby_top_self, "private", top_private, -1); - - rb_define_method(rb_mKernel, "extend", rb_obj_extend, -1); - - rb_define_global_function("trace_var", rb_f_trace_var, -1); /* in variable.c */ - rb_define_global_function("untrace_var", rb_f_untrace_var, -1); /* in variable.c */ - - rb_define_global_function("set_trace_func", set_trace_func, 1); - rb_global_variable(&trace_func); - - rb_define_virtual_variable("$SAFE", safe_getter, safe_setter); -} - -/* - * call-seq: - * mod.autoload(name, filename) => nil - * - * Registers _filename_ to be loaded (using <code>Kernel::require</code>) - * the first time that _name_ (which may be a <code>String</code> or - * a symbol) is accessed in the namespace of _mod_. - * - * module A - * end - * A.autoload(:B, "b") - * A::B.doit # autoloads "b" - */ - -static VALUE -rb_mod_autoload(mod, sym, file) - VALUE mod; - VALUE sym; - VALUE file; -{ - ID id = rb_to_id(sym); - - Check_SafeStr(file); - rb_autoload(mod, id, RSTRING(file)->ptr); - return Qnil; -} - -/* - * call-seq: - * mod.autoload?(name) => String or nil - * - * Returns _filename_ to be loaded if _name_ is registered as - * +autoload+ in the namespace of _mod_. - * - * module A - * end - * A.autoload(:B, "b") - * A.autoload?(:B) # => "b" - */ - -static VALUE -rb_mod_autoload_p(mod, sym) - VALUE mod, sym; -{ - return rb_autoload_p(mod, rb_to_id(sym)); -} - -/* - * call-seq: - * autoload(module, filename) => nil - * - * Registers _filename_ to be loaded (using <code>Kernel::require</code>) - * the first time that _module_ (which may be a <code>String</code> or - * a symbol) is accessed. - * - * autoload(:MyModule, "/usr/local/lib/modules/my_module.rb") - */ - -static VALUE -rb_f_autoload(obj, sym, file) - VALUE obj; - VALUE sym; - VALUE file; -{ - if (NIL_P(ruby_cbase)) { - rb_raise(rb_eTypeError, "no class/module for autoload target"); - } - return rb_mod_autoload(ruby_cbase, sym, file); -} - -/* - * call-seq: - * autoload(module, filename) => nil - * - * Registers _filename_ to be loaded (using <code>Kernel::require</code>) - * the first time that _module_ (which may be a <code>String</code> or - * a symbol) is accessed. - * - * autoload(:MyModule, "/usr/local/lib/modules/my_module.rb") - */ - -static VALUE -rb_f_autoload_p(obj, sym) - VALUE obj; - VALUE sym; -{ - /* use ruby_cbase as same as rb_f_autoload. */ - if (NIL_P(ruby_cbase)) { - return Qfalse; - } - return rb_mod_autoload_p(ruby_cbase, sym); -} - -void -Init_load() -{ - rb_define_readonly_variable("$:", &rb_load_path); - rb_define_readonly_variable("$-I", &rb_load_path); - rb_define_readonly_variable("$LOAD_PATH", &rb_load_path); - rb_load_path = rb_ary_new(); - - rb_define_readonly_variable("$\"", &rb_features); - rb_define_readonly_variable("$LOADED_FEATURES", &rb_features); - rb_features = rb_ary_new(); - - rb_define_global_function("load", rb_f_load, -1); - rb_define_global_function("require", rb_f_require, 1); - rb_define_method(rb_cModule, "autoload", rb_mod_autoload, 2); - rb_define_method(rb_cModule, "autoload?", rb_mod_autoload_p, 1); - rb_define_global_function("autoload", rb_f_autoload, 2); - rb_define_global_function("autoload?", rb_f_autoload_p, 1); - rb_global_variable(&ruby_wrapper); - - rb_global_variable(&ruby_dln_librefs); - ruby_dln_librefs = rb_ary_new(); -} - -static void -scope_dup(scope) - struct SCOPE *scope; -{ - ID *tbl; - VALUE *vars; - - scope->flags |= SCOPE_DONT_RECYCLE; - if (scope->flags & SCOPE_MALLOC) return; - - if (scope->local_tbl) { - tbl = scope->local_tbl; - vars = ALLOC_N(VALUE, tbl[0]+1); - *vars++ = scope->local_vars[-1]; - MEMCPY(vars, scope->local_vars, VALUE, tbl[0]); - scope->local_vars = vars; - scope->flags |= SCOPE_MALLOC; - } -} - -static void -blk_mark(data) - struct BLOCK *data; -{ - while (data) { - rb_gc_mark_frame(&data->frame); - rb_gc_mark((VALUE)data->scope); - rb_gc_mark((VALUE)data->var); - rb_gc_mark((VALUE)data->body); - rb_gc_mark((VALUE)data->self); - rb_gc_mark((VALUE)data->dyna_vars); - rb_gc_mark((VALUE)data->cref); - rb_gc_mark(data->wrapper); - rb_gc_mark(data->block_obj); - data = data->prev; - } -} - -static void -frame_free(frame) - struct FRAME *frame; -{ - struct FRAME *tmp; - - frame = frame->prev; - while (frame) { - tmp = frame; - frame = frame->prev; - free(tmp); - } -} - -static void -blk_free(data) - struct BLOCK *data; -{ - void *tmp; - - while (data) { - frame_free(&data->frame); - tmp = data; - data = data->prev; - free(tmp); - } -} - -static void -frame_dup(frame) - struct FRAME *frame; -{ - struct FRAME *tmp; - - for (;;) { - frame->tmp = 0; /* should not preserve tmp */ - if (!frame->prev) break; - tmp = ALLOC(struct FRAME); - *tmp = *frame->prev; - frame->prev = tmp; - frame = tmp; - } -} - - -static void -blk_copy_prev(block) - struct BLOCK *block; -{ - struct BLOCK *tmp; - struct RVarmap* vars; - - while (block->prev) { - tmp = ALLOC_N(struct BLOCK, 1); - MEMCPY(tmp, block->prev, struct BLOCK, 1); - scope_dup(tmp->scope); - frame_dup(&tmp->frame); - - for (vars = tmp->dyna_vars; vars; vars = vars->next) { - if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break; - FL_SET(vars, DVAR_DONT_RECYCLE); - } - - block->prev = tmp; - block = tmp; - } -} - - -static void -blk_dup(dup, orig) - struct BLOCK *dup, *orig; -{ - MEMCPY(dup, orig, struct BLOCK, 1); - frame_dup(&dup->frame); - - if (dup->iter) { - blk_copy_prev(dup); - } - else { - dup->prev = 0; - } -} - -/* - * MISSING: documentation - */ - -static VALUE -proc_clone(self) - VALUE self; -{ - struct BLOCK *orig, *data; - VALUE bind; - - Data_Get_Struct(self, struct BLOCK, orig); - bind = Data_Make_Struct(rb_obj_class(self),struct BLOCK,blk_mark,blk_free,data); - CLONESETUP(bind, self); - blk_dup(data, orig); - - return bind; -} - -/* - * MISSING: documentation - */ - -#define PROC_TSHIFT (FL_USHIFT+1) -#define PROC_TMASK (FL_USER1|FL_USER2|FL_USER3) -#define PROC_TMAX (PROC_TMASK >> PROC_TSHIFT) - -static int proc_get_safe_level(VALUE); - -static VALUE -proc_dup(self) - VALUE self; -{ - struct BLOCK *orig, *data; - VALUE bind; - int safe = proc_get_safe_level(self); - - Data_Get_Struct(self, struct BLOCK, orig); - bind = Data_Make_Struct(rb_obj_class(self),struct BLOCK,blk_mark,blk_free,data); - blk_dup(data, orig); - if (safe > PROC_TMAX) safe = PROC_TMAX; - FL_SET(bind, (safe << PROC_TSHIFT) & PROC_TMASK); - - return bind; -} - -/* - * call-seq: - * binding -> a_binding - * - * Returns a +Binding+ object, describing the variable and - * method bindings at the point of call. This object can be used when - * calling +eval+ to execute the evaluated command in this - * environment. Also see the description of class +Binding+. - * - * def getBinding(param) - * return binding - * end - * b = getBinding("hello") - * eval("param", b) #=> "hello" - */ - -static VALUE -rb_f_binding(self) - VALUE self; -{ - struct BLOCK *data, *p; - struct RVarmap *vars; - VALUE bind; - - PUSH_BLOCK(0,0); - bind = Data_Make_Struct(rb_cBinding,struct BLOCK,blk_mark,blk_free,data); - *data = *ruby_block; - - data->orig_thread = rb_thread_current(); - data->wrapper = ruby_wrapper; - data->iter = rb_f_block_given_p(); - frame_dup(&data->frame); - if (ruby_frame->prev) { - data->frame.last_func = ruby_frame->prev->last_func; - data->frame.last_class = ruby_frame->prev->last_class; - data->frame.orig_func = ruby_frame->prev->orig_func; - } - - if (data->iter) { - blk_copy_prev(data); - } - else { - data->prev = 0; - } - - for (p = data; p; p = p->prev) { - for (vars = p->dyna_vars; vars; vars = vars->next) { - if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break; - FL_SET(vars, DVAR_DONT_RECYCLE); - } - } - scope_dup(data->scope); - POP_BLOCK(); - - return bind; -} - -#define SAFE_LEVEL_MAX PROC_TMASK - -static void -proc_save_safe_level(data) - VALUE data; -{ - int safe = ruby_safe_level; - if (safe > PROC_TMAX) safe = PROC_TMAX; - FL_SET(data, (safe << PROC_TSHIFT) & PROC_TMASK); -} - -static int -proc_get_safe_level(data) - VALUE data; -{ - return (RBASIC(data)->flags & PROC_TMASK) >> PROC_TSHIFT; -} - -static void -proc_set_safe_level(data) - VALUE data; -{ - ruby_safe_level = proc_get_safe_level(data); -} - -static VALUE -proc_alloc(klass, proc) - VALUE klass; - int proc; -{ - volatile VALUE block; - struct BLOCK *data, *p; - struct RVarmap *vars; - - if (!rb_block_given_p() && !rb_f_block_given_p()) { - rb_raise(rb_eArgError, "tried to create Proc object without a block"); - } - if (proc && !rb_block_given_p()) { - rb_warn("tried to create Proc object without a block"); - } - - if (!proc && ruby_block->block_obj && CLASS_OF(ruby_block->block_obj) == klass) { - return ruby_block->block_obj; - } - block = Data_Make_Struct(klass, struct BLOCK, blk_mark, blk_free, data); - *data = *ruby_block; - - data->orig_thread = rb_thread_current(); - data->wrapper = ruby_wrapper; - data->iter = data->prev?Qtrue:Qfalse; - data->block_obj = block; - frame_dup(&data->frame); - if (data->iter) { - blk_copy_prev(data); - } - else { - data->prev = 0; - } - - for (p = data; p; p = p->prev) { - for (vars = p->dyna_vars; vars; vars = vars->next) { - if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break; - FL_SET(vars, DVAR_DONT_RECYCLE); - } - } - scope_dup(data->scope); - proc_save_safe_level(block); - if (proc) { - data->flags |= BLOCK_LAMBDA; - } - else { - ruby_block->block_obj = block; - } - - return block; -} - -/* - * call-seq: - * Proc.new {|...| block } => a_proc - * Proc.new => a_proc - * - * Creates a new <code>Proc</code> object, bound to the current - * context. <code>Proc::new</code> may be called without a block only - * within a method with an attached block, in which case that block is - * converted to the <code>Proc</code> object. - * - * def proc_from - * Proc.new - * end - * proc = proc_from { "hello" } - * proc.call #=> "hello" - */ - -static VALUE -proc_s_new(argc, argv, klass) - int argc; - VALUE *argv; - VALUE klass; -{ - VALUE block = proc_alloc(klass, Qfalse); - - rb_obj_call_init(block, argc, argv); - return block; -} - -VALUE -rb_block_proc() -{ - return proc_alloc(rb_cProc, Qfalse); -} - -VALUE -rb_f_lambda() -{ - rb_warn("rb_f_lambda() is deprecated; use rb_block_proc() instead"); - return proc_alloc(rb_cProc, Qtrue); -} - -/* - * call-seq: - * proc { |...| block } => a_proc - * lambda { |...| block } => a_proc - * - * Equivalent to <code>Proc.new</code>, except the resulting Proc objects - * check the number of parameters passed when called. - */ - -static VALUE -proc_lambda() -{ - return proc_alloc(rb_cProc, Qtrue); -} - -static int -block_orphan(data) - struct BLOCK *data; -{ - if (data->scope->flags & SCOPE_NOSTACK) { - return 1; - } - if (data->orig_thread != rb_thread_current()) { - return 1; - } - return 0; -} - -static VALUE -proc_invoke(proc, args, self, klass) - VALUE proc, args; /* OK */ - VALUE self, klass; -{ - struct BLOCK * volatile old_block; - struct BLOCK _block; - struct BLOCK *data; - volatile VALUE result = Qundef; - int state; - volatile int safe = ruby_safe_level; - volatile VALUE old_wrapper = ruby_wrapper; - volatile int pcall, avalue = Qtrue; - volatile VALUE tmp = args; - - if (rb_block_given_p() && ruby_frame->last_func) { - if (klass != ruby_frame->last_class) - klass = rb_obj_class(proc); - rb_warning("block for %s#%s is useless", - rb_class2name(klass), - rb_id2name(ruby_frame->last_func)); - } - - Data_Get_Struct(proc, struct BLOCK, data); - pcall = (data->flags & BLOCK_LAMBDA) ? YIELD_LAMBDA_CALL : 0; - if (!pcall && RARRAY(args)->len == 1) { - avalue = Qfalse; - args = RARRAY(args)->ptr[0]; - } - - PUSH_VARS(); - ruby_wrapper = data->wrapper; - ruby_dyna_vars = data->dyna_vars; - /* PUSH BLOCK from data */ - old_block = ruby_block; - _block = *data; - if (self != Qundef) _block.frame.self = self; - if (klass) _block.frame.last_class = klass; - _block.frame.argc = RARRAY(tmp)->len; - _block.frame.flags = ruby_frame->flags; - if (_block.frame.argc && DMETHOD_P()) { - NEWOBJ(scope, struct SCOPE); - OBJSETUP(scope, tmp, T_SCOPE); - scope->local_tbl = _block.scope->local_tbl; - scope->local_vars = _block.scope->local_vars; - scope->flags |= SCOPE_CLONE; - _block.scope = scope; - } - /* modify current frame */ - ruby_block = &_block; - PUSH_ITER(ITER_CUR); - ruby_frame->iter = ITER_CUR; - PUSH_TAG(pcall ? PROT_LAMBDA : PROT_NONE); - state = EXEC_TAG(); - if (state == 0) { - proc_set_safe_level(proc); - result = rb_yield_0(args, self, (self!=Qundef)?CLASS_OF(self):0, pcall, avalue); - } - else if (TAG_DST()) { - result = prot_tag->retval; - } - POP_TAG(); - POP_ITER(); - ruby_block = old_block; - ruby_wrapper = old_wrapper; - POP_VARS(); - ruby_safe_level = safe; - - switch (state) { - case 0: - break; - case TAG_RETRY: - proc_jump_error(TAG_RETRY, Qnil); /* xxx */ - JUMP_TAG(state); - break; - case TAG_NEXT: - case TAG_BREAK: - if (!pcall && result != Qundef) { - proc_jump_error(state, result); - } - case TAG_RETURN: - if (result != Qundef) { - if (pcall) break; - return_jump(result); - } - default: - JUMP_TAG(state); - } - return result; -} - -/* CHECKME: are the argument checking semantics correct? */ - -/* - * call-seq: - * prc.call(params,...) => obj - * prc[params,...] => obj - * - * Invokes the block, setting the block's parameters to the values in - * <i>params</i> using something close to method calling semantics. - * Generates a warning if multiple values are passed to a proc that - * expects just one (previously this silently converted the parameters - * to an array). - * - * For procs created using <code>Kernel.proc</code>, generates an - * error if the wrong number of parameters - * are passed to a proc with multiple parameters. For procs created using - * <code>Proc.new</code>, extra parameters are silently discarded. - * - * Returns the value of the last expression evaluated in the block. See - * also <code>Proc#yield</code>. - * - * a_proc = Proc.new {|a, *b| b.collect {|i| i*a }} - * a_proc.call(9, 1, 2, 3) #=> [9, 18, 27] - * a_proc[9, 1, 2, 3] #=> [9, 18, 27] - * a_proc = Proc.new {|a,b| a} - * a_proc.call(1,2,3) - * - * <em>produces:</em> - * - * prog.rb:5: wrong number of arguments (3 for 2) (ArgumentError) - * from prog.rb:4:in `call' - * from prog.rb:5 - */ - -static VALUE -proc_call(proc, args) - VALUE proc, args; /* OK */ -{ - return proc_invoke(proc, args, Qundef, 0); -} - -static VALUE bmcall _((VALUE, VALUE)); -static VALUE method_arity _((VALUE)); - -/* - * call-seq: - * prc.arity -> fixnum - * - * Returns the number of arguments that would not be ignored. If the block - * is declared to take no arguments, returns 0. If the block is known - * to take exactly n arguments, returns n. If the block has optional - * arguments, return -n-1, where n is the number of mandatory - * arguments. A <code>proc</code> with no argument declarations - * is the same a block declaring <code>||</code> as its arguments. - * - * Proc.new {}.arity #=> 0 - * Proc.new {||}.arity #=> 0 - * Proc.new {|a|}.arity #=> 1 - * Proc.new {|a,b|}.arity #=> 2 - * Proc.new {|a,b,c|}.arity #=> 3 - * Proc.new {|*a|}.arity #=> -1 - * Proc.new {|a,*b|}.arity #=> -2 - */ - -static VALUE -proc_arity(proc) - VALUE proc; -{ - struct BLOCK *data; - NODE *list; - int n; - - Data_Get_Struct(proc, struct BLOCK, data); - if (data->var == 0) { - if (data->body && nd_type(data->body) == NODE_IFUNC && - data->body->nd_cfnc == bmcall) { - return method_arity(data->body->nd_tval); - } - return INT2FIX(-1); - } - if (data->var == (NODE*)1) return INT2FIX(0); - if (data->var == (NODE*)2) return INT2FIX(0); - switch (nd_type(data->var)) { - default: - return INT2FIX(1); - case NODE_MASGN: - list = data->var->nd_head; - n = 0; - while (list) { - n++; - list = list->nd_next; - } - if (data->var->nd_args) return INT2FIX(-n-1); - return INT2FIX(n); - } -} - -/* - * call-seq: - * prc == other_proc => true or false - * - * Return <code>true</code> if <i>prc</i> is the same object as - * <i>other_proc</i>, or if they are both procs with the same body. - */ - -static VALUE -proc_eq(self, other) - VALUE self, other; -{ - struct BLOCK *data, *data2; - - if (self == other) return Qtrue; - if (TYPE(other) != T_DATA) return Qfalse; - if (RDATA(other)->dmark != (RUBY_DATA_FUNC)blk_mark) return Qfalse; - if (CLASS_OF(self) != CLASS_OF(other)) return Qfalse; - Data_Get_Struct(self, struct BLOCK, data); - Data_Get_Struct(other, struct BLOCK, data2); - if (data->body != data2->body) return Qfalse; - if (data->var != data2->var) return Qfalse; - if (data->scope != data2->scope) return Qfalse; - if (data->dyna_vars != data2->dyna_vars) return Qfalse; - if (data->flags != data2->flags) return Qfalse; - - return Qtrue; -} - -/* - * call-seq: - * prc.to_s => string - * - * Shows the unique identifier for this proc, along with - * an indication of where the proc was defined. - */ - -static VALUE -proc_to_s(self) - VALUE self; -{ - struct BLOCK *data; - NODE *node; - char *cname = rb_obj_classname(self); - const int w = (sizeof(VALUE) * CHAR_BIT) / 4; - long len = strlen(cname)+6+w; /* 6:tags 16:addr */ - VALUE str; - - Data_Get_Struct(self, struct BLOCK, data); - if ((node = data->frame.node) || (node = data->body)) { - len += strlen(node->nd_file) + 2 + (SIZEOF_LONG*CHAR_BIT-NODE_LSHIFT)/3; - str = rb_str_new(0, len); - snprintf(RSTRING(str)->ptr, len+1, - "#<%s:0x%.*lx@%s:%d>", cname, w, (VALUE)data->body, - node->nd_file, nd_line(node)); - } - else { - str = rb_str_new(0, len); - snprintf(RSTRING(str)->ptr, len+1, - "#<%s:0x%.*lx>", cname, w, (VALUE)data->body); - } - RSTRING(str)->len = strlen(RSTRING(str)->ptr); - if (OBJ_TAINTED(self)) OBJ_TAINT(str); - - return str; -} - -/* - * call-seq: - * prc.to_proc -> prc - * - * Part of the protocol for converting objects to <code>Proc</code> - * objects. Instances of class <code>Proc</code> simply return - * themselves. - */ - -static VALUE -proc_to_self(self) - VALUE self; -{ - return self; -} - -/* - * call-seq: - * prc.binding => binding - * - * Returns the binding associated with <i>prc</i>. Note that - * <code>Kernel#eval</code> accepts either a <code>Proc</code> or a - * <code>Binding</code> object as its second parameter. - * - * def fred(param) - * proc {} - * end - * - * b = fred(99) - * eval("param", b.binding) #=> 99 - * eval("param", b) #=> 99 - */ - -static VALUE -proc_binding(proc) - VALUE proc; -{ - struct BLOCK *orig, *data; - VALUE bind; - - Data_Get_Struct(proc, struct BLOCK, orig); - bind = Data_Make_Struct(rb_cBinding,struct BLOCK,blk_mark,blk_free,data); - MEMCPY(data, orig, struct BLOCK, 1); - frame_dup(&data->frame); - - if (data->iter) { - blk_copy_prev(data); - } - else { - data->prev = 0; - } - - return bind; -} - -static VALUE -block_pass(self, node) - VALUE self; - NODE *node; -{ - VALUE proc = rb_eval(self, node->nd_body); /* OK */ - VALUE b; - struct BLOCK * volatile old_block; - struct BLOCK _block; - struct BLOCK *data; - volatile VALUE result = Qnil; - int state; - volatile int orphan; - volatile int safe = ruby_safe_level; - - if (NIL_P(proc)) { - PUSH_ITER(ITER_NOT); - result = rb_eval(self, node->nd_iter); - POP_ITER(); - return result; - } - if (!rb_obj_is_proc(proc)) { - b = rb_check_convert_type(proc, T_DATA, "Proc", "to_proc"); - if (!rb_obj_is_proc(b)) { - rb_raise(rb_eTypeError, "wrong argument type %s (expected Proc)", - rb_obj_classname(proc)); - } - proc = b; - } - - if (ruby_safe_level >= 1 && OBJ_TAINTED(proc) && - ruby_safe_level > proc_get_safe_level(proc)) { - rb_raise(rb_eSecurityError, "Insecure: tainted block value"); - } - - if (ruby_block && ruby_block->block_obj == proc) { - PUSH_ITER(ITER_PAS); - result = rb_eval(self, node->nd_iter); - POP_ITER(); - return result; - } - - Data_Get_Struct(proc, struct BLOCK, data); - orphan = block_orphan(data); - - /* PUSH BLOCK from data */ - old_block = ruby_block; - _block = *data; - _block.outer = ruby_block; - if (orphan) _block.uniq = block_unique++; - ruby_block = &_block; - PUSH_ITER(ITER_PRE); - if (ruby_frame->iter == ITER_NOT) - ruby_frame->iter = ITER_PRE; - - PUSH_TAG(PROT_LOOP); - state = EXEC_TAG(); - if (state == 0) { - retry: - proc_set_safe_level(proc); - if (safe > ruby_safe_level) - ruby_safe_level = safe; - result = rb_eval(self, node->nd_iter); - } - else if (state == TAG_BREAK && TAG_DST()) { - result = prot_tag->retval; - state = 0; - } - else if (state == TAG_RETRY) { - state = 0; - goto retry; - } - POP_TAG(); - POP_ITER(); - ruby_block = old_block; - ruby_safe_level = safe; - - switch (state) {/* escape from orphan block */ - case 0: - break; - case TAG_RETURN: - if (orphan) { - proc_jump_error(state, prot_tag->retval); - } - default: - JUMP_TAG(state); - } - - return result; -} - -struct METHOD { - VALUE klass, rklass; - VALUE recv; - ID id, oid; - int safe_level; - NODE *body; -}; - -static void -bm_mark(data) - struct METHOD *data; -{ - rb_gc_mark(data->rklass); - rb_gc_mark(data->klass); - rb_gc_mark(data->recv); - rb_gc_mark((VALUE)data->body); -} - -static VALUE -mnew(klass, obj, id, mklass) - VALUE klass, obj, mklass; - ID id; -{ - VALUE method; - NODE *body; - int noex; - struct METHOD *data; - VALUE rklass = klass; - ID oid = id; - - again: - if ((body = rb_get_method_body(&klass, &id, &noex)) == 0) { - print_undef(rklass, oid); - } - - if (nd_type(body) == NODE_ZSUPER) { - klass = RCLASS(klass)->super; - goto again; - } - - while (rklass != klass && - (FL_TEST(rklass, FL_SINGLETON) || TYPE(rklass) == T_ICLASS)) { - rklass = RCLASS(rklass)->super; - } - method = Data_Make_Struct(mklass, struct METHOD, bm_mark, free, data); - data->klass = klass; - data->recv = obj; - data->id = id; - data->body = body; - data->rklass = rklass; - data->oid = oid; - data->safe_level = NOEX_WITH_SAFE(noex); - OBJ_INFECT(method, klass); - - return method; -} - - -/********************************************************************** - * - * Document-class : Method - * - * Method objects are created by <code>Object#method</code>, and are - * associated with a particular object (not just with a class). They - * may be used to invoke the method within the object, and as a block - * associated with an iterator. They may also be unbound from one - * object (creating an <code>UnboundMethod</code>) and bound to - * another. - * - * class Thing - * def square(n) - * n*n - * end - * end - * thing = Thing.new - * meth = thing.method(:square) - * - * meth.call(9) #=> 81 - * [ 1, 2, 3 ].collect(&meth) #=> [1, 4, 9] - * - */ - -/* - * call-seq: - * meth == other_meth => true or false - * - * Two method objects are equal if that are bound to the same - * object and contain the same body. - */ - - -static VALUE -method_eq(method, other) - VALUE method, other; -{ - struct METHOD *m1, *m2; - - if (TYPE(other) != T_DATA || RDATA(other)->dmark != (RUBY_DATA_FUNC)bm_mark) - return Qfalse; - if (CLASS_OF(method) != CLASS_OF(other)) - return Qfalse; - - Data_Get_Struct(method, struct METHOD, m1); - Data_Get_Struct(other, struct METHOD, m2); - - if (m1->klass != m2->klass || m1->rklass != m2->rklass || - m1->recv != m2->recv || m1->body != m2->body) - return Qfalse; - - return Qtrue; -} - -/* - * call-seq: - * meth.unbind => unbound_method - * - * Dissociates <i>meth</i> from it's current receiver. The resulting - * <code>UnboundMethod</code> can subsequently be bound to a new object - * of the same class (see <code>UnboundMethod</code>). - */ - -static VALUE -method_unbind(obj) - VALUE obj; -{ - VALUE method; - struct METHOD *orig, *data; - - Data_Get_Struct(obj, struct METHOD, orig); - method = Data_Make_Struct(rb_cUnboundMethod, struct METHOD, bm_mark, free, data); - data->klass = orig->klass; - data->recv = Qundef; - data->id = orig->id; - data->body = orig->body; - data->rklass = orig->rklass; - data->oid = orig->oid; - OBJ_INFECT(method, obj); - - return method; -} - -/* - * call-seq: - * obj.method(sym) => method - * - * Looks up the named method as a receiver in <i>obj</i>, returning a - * <code>Method</code> object (or raising <code>NameError</code>). The - * <code>Method</code> object acts as a closure in <i>obj</i>'s object - * instance, so instance variables and the value of <code>self</code> - * remain available. - * - * class Demo - * def initialize(n) - * @iv = n - * end - * def hello() - * "Hello, @iv = #{@iv}" - * end - * end - * - * k = Demo.new(99) - * m = k.method(:hello) - * m.call #=> "Hello, @iv = 99" - * - * l = Demo.new('Fred') - * m = l.method("hello") - * m.call #=> "Hello, @iv = Fred" - */ - -static VALUE -rb_obj_method(obj, vid) - VALUE obj; - VALUE vid; -{ - return mnew(CLASS_OF(obj), obj, rb_to_id(vid), rb_cMethod); -} - -/* - * call-seq: - * mod.instance_method(symbol) => unbound_method - * - * Returns an +UnboundMethod+ representing the given - * instance method in _mod_. - * - * class Interpreter - * def do_a() print "there, "; end - * def do_d() print "Hello "; end - * def do_e() print "!\n"; end - * def do_v() print "Dave"; end - * Dispatcher = { - * ?a => instance_method(:do_a), - * ?d => instance_method(:do_d), - * ?e => instance_method(:do_e), - * ?v => instance_method(:do_v) - * } - * def interpret(string) - * string.each_byte {|b| Dispatcher[b].bind(self).call } - * end - * end - * - * - * interpreter = Interpreter.new - * interpreter.interpret('dave') - * - * <em>produces:</em> - * - * Hello there, Dave! - */ - -static VALUE -rb_mod_method(mod, vid) - VALUE mod; - VALUE vid; -{ - return mnew(mod, Qundef, rb_to_id(vid), rb_cUnboundMethod); -} - -/* - * MISSING: documentation - */ - -static VALUE -method_clone(self) - VALUE self; -{ - VALUE clone; - struct METHOD *orig, *data; - - Data_Get_Struct(self, struct METHOD, orig); - clone = Data_Make_Struct(CLASS_OF(self),struct METHOD, bm_mark, free, data); - CLONESETUP(clone, self); - *data = *orig; - - return clone; -} - -/* - * call-seq: - * meth.call(args, ...) => obj - * meth[args, ...] => obj - * - * Invokes the <i>meth</i> with the specified arguments, returning the - * method's return value. - * - * m = 12.method("+") - * m.call(3) #=> 15 - * m.call(20) #=> 32 - */ - -static VALUE -method_call(argc, argv, method) - int argc; - VALUE *argv; - VALUE method; -{ - VALUE result = Qnil; /* OK */ - struct METHOD *data; - int safe; - - Data_Get_Struct(method, struct METHOD, data); - if (data->recv == Qundef) { - rb_raise(rb_eTypeError, "can't call unbound method; bind first"); - } - if (OBJ_TAINTED(method)) { - safe = NOEX_WITH(data->safe_level, 4)|NOEX_TAINTED; - } - else { - safe = data->safe_level; - } - PUSH_ITER(rb_block_given_p()?ITER_PRE:ITER_NOT); - result = rb_call0(data->klass,data->recv,data->id,data->oid,argc,argv,data->body,safe); - POP_ITER(); - return result; -} - -/********************************************************************** - * - * Document-class: UnboundMethod - * - * Ruby supports two forms of objectified methods. Class - * <code>Method</code> is used to represent methods that are associated - * with a particular object: these method objects are bound to that - * object. Bound method objects for an object can be created using - * <code>Object#method</code>. - * - * Ruby also supports unbound methods; methods objects that are not - * associated with a particular object. These can be created either by - * calling <code>Module#instance_method</code> or by calling - * <code>unbind</code> on a bound method object. The result of both of - * these is an <code>UnboundMethod</code> object. - * - * Unbound methods can only be called after they are bound to an - * object. That object must be be a kind_of? the method's original - * class. - * - * class Square - * def area - * @side * @side - * end - * def initialize(side) - * @side = side - * end - * end - * - * area_un = Square.instance_method(:area) - * - * s = Square.new(12) - * area = area_un.bind(s) - * area.call #=> 144 - * - * Unbound methods are a reference to the method at the time it was - * objectified: subsequent changes to the underlying class will not - * affect the unbound method. - * - * class Test - * def test - * :original - * end - * end - * um = Test.instance_method(:test) - * class Test - * def test - * :modified - * end - * end - * t = Test.new - * t.test #=> :modified - * um.bind(t).call #=> :original - * - */ - -/* - * call-seq: - * umeth.bind(obj) -> method - * - * Bind <i>umeth</i> to <i>obj</i>. If <code>Klass</code> was the class - * from which <i>umeth</i> was obtained, - * <code>obj.kind_of?(Klass)</code> must be true. - * - * class A - * def test - * puts "In test, class = #{self.class}" - * end - * end - * class B < A - * end - * class C < B - * end - * - * - * um = B.instance_method(:test) - * bm = um.bind(C.new) - * bm.call - * bm = um.bind(B.new) - * bm.call - * bm = um.bind(A.new) - * bm.call - * - * <em>produces:</em> - * - * In test, class = C - * In test, class = B - * prog.rb:16:in `bind': bind argument must be an instance of B (TypeError) - * from prog.rb:16 - */ - -static VALUE -umethod_bind(method, recv) - VALUE method, recv; -{ - struct METHOD *data, *bound; - VALUE rklass = CLASS_OF(recv); - - Data_Get_Struct(method, struct METHOD, data); - if (data->rklass != rklass) { - if (FL_TEST(data->rklass, FL_SINGLETON)) { - rb_raise(rb_eTypeError, "singleton method bound for a different object"); - } - if (TYPE(data->rklass) == T_MODULE) { - st_table *m_tbl = RCLASS(data->rklass)->m_tbl; - while (RCLASS(rklass)->m_tbl != m_tbl) { - rklass = RCLASS(rklass)->super; - if (!rklass) goto not_instace; - } - } - else if (!rb_obj_is_kind_of(recv, data->rklass)) { - not_instace: - rb_raise(rb_eTypeError, "bind argument must be an instance of %s", - rb_class2name(data->rklass)); - } - } - - method = Data_Make_Struct(rb_cMethod,struct METHOD,bm_mark,free,bound); - *bound = *data; - bound->recv = recv; - bound->rklass = rklass; - - return method; -} - -/* - * call-seq: - * meth.arity => fixnum - * - * Returns an indication of the number of arguments accepted by a - * method. Returns a nonnegative integer for methods that take a fixed - * number of arguments. For Ruby methods that take a variable number of - * arguments, returns -n-1, where n is the number of required - * arguments. For methods written in C, returns -1 if the call takes a - * variable number of arguments. - * - * class C - * def one; end - * def two(a); end - * def three(*a); end - * def four(a, b); end - * def five(a, b, *c); end - * def six(a, b, *c, &d); end - * end - * c = C.new - * c.method(:one).arity #=> 0 - * c.method(:two).arity #=> 1 - * c.method(:three).arity #=> -1 - * c.method(:four).arity #=> 2 - * c.method(:five).arity #=> -3 - * c.method(:six).arity #=> -3 - * - * "cat".method(:size).arity #=> 0 - * "cat".method(:replace).arity #=> 1 - * "cat".method(:squeeze).arity #=> -1 - * "cat".method(:count).arity #=> -1 - */ - -static VALUE -method_arity(method) - VALUE method; -{ - struct METHOD *data; - NODE *body; - int n; - - Data_Get_Struct(method, struct METHOD, data); - - body = data->body; - switch (nd_type(body)) { - case NODE_CFUNC: - if (body->nd_argc < 0) return INT2FIX(-1); - return INT2FIX(body->nd_argc); - case NODE_ZSUPER: - return INT2FIX(-1); - case NODE_ATTRSET: - return INT2FIX(1); - case NODE_IVAR: - return INT2FIX(0); - case NODE_BMETHOD: - return proc_arity(body->nd_cval); - case NODE_DMETHOD: - return method_arity(body->nd_cval); - case NODE_SCOPE: - body = body->nd_next; /* skip NODE_SCOPE */ - if (nd_type(body) == NODE_BLOCK) - body = body->nd_head; - if (!body) return INT2FIX(0); - n = body->nd_cnt; - if (body->nd_opt || body->nd_rest) - n = -n-1; - return INT2FIX(n); - default: - rb_raise(rb_eArgError, "invalid node 0x%x", nd_type(body)); - } -} - -/* - * call-seq: - * meth.to_s => string - * meth.inspect => string - * - * Show the name of the underlying method. - * - * "cat".method(:count).inspect #=> "#<Method: String#count>" - */ - -static VALUE -method_inspect(method) - VALUE method; -{ - struct METHOD *data; - VALUE str; - const char *s; - char *sharp = "#"; - - Data_Get_Struct(method, struct METHOD, data); - str = rb_str_buf_new2("#<"); - s = rb_obj_classname(method); - rb_str_buf_cat2(str, s); - rb_str_buf_cat2(str, ": "); - - if (FL_TEST(data->klass, FL_SINGLETON)) { - VALUE v = rb_iv_get(data->klass, "__attached__"); - - if (data->recv == Qundef) { - rb_str_buf_append(str, rb_inspect(data->klass)); - } - else if (data->recv == v) { - rb_str_buf_append(str, rb_inspect(v)); - sharp = "."; - } - else { - rb_str_buf_append(str, rb_inspect(data->recv)); - rb_str_buf_cat2(str, "("); - rb_str_buf_append(str, rb_inspect(v)); - rb_str_buf_cat2(str, ")"); - sharp = "."; - } - } - else { - rb_str_buf_cat2(str, rb_class2name(data->rklass)); - if (data->rklass != data->klass) { - VALUE klass = data -> klass; - if (TYPE(klass) == T_ICLASS) { - klass = RBASIC(klass)->klass; - } - rb_str_buf_cat2(str, "("); - rb_str_buf_cat2(str, rb_class2name(klass)); - rb_str_buf_cat2(str, ")"); - } - } - rb_str_buf_cat2(str, sharp); - rb_str_buf_cat2(str, rb_id2name(data->oid)); - rb_str_buf_cat2(str, ">"); - - return str; -} - -static VALUE -mproc(method) - VALUE method; -{ - VALUE proc; - - /* emulate ruby's method call */ - PUSH_ITER(ITER_CUR); - PUSH_FRAME(); - proc = rb_block_proc(); - POP_FRAME(); - POP_ITER(); - - return proc; -} - -static VALUE -bmcall(args, method) - VALUE args, method; -{ - volatile VALUE a; - VALUE ret; - - a = svalue_to_avalue(args); - ret = method_call(RARRAY(a)->len, RARRAY(a)->ptr, method); - a = Qnil; /* prevent tail call */ - return ret; -} - -VALUE -rb_proc_new(func, val) - VALUE (*func)(ANYARGS); /* VALUE yieldarg[, VALUE procarg] */ - VALUE val; -{ - struct BLOCK *data; - VALUE proc = rb_iterate((VALUE(*)_((VALUE)))mproc, 0, func, val); - - Data_Get_Struct(proc, struct BLOCK, data); - data->body->nd_state = YIELD_FUNC_AVALUE; - return proc; -} - -/* - * call-seq: - * meth.to_proc => prc - * - * Returns a <code>Proc</code> object corresponding to this method. - */ - -static VALUE -method_proc(method) - VALUE method; -{ - VALUE proc; - struct METHOD *mdata; - struct BLOCK *bdata; - - proc = rb_iterate((VALUE(*)_((VALUE)))mproc, 0, bmcall, method); - Data_Get_Struct(method, struct METHOD, mdata); - Data_Get_Struct(proc, struct BLOCK, bdata); - bdata->body->nd_file = mdata->body->nd_file; - nd_set_line(bdata->body, nd_line(mdata->body)); - bdata->body->nd_state = YIELD_FUNC_SVALUE; - - return proc; -} - -static VALUE -rb_obj_is_method(m) - VALUE m; -{ - if (TYPE(m) == T_DATA && RDATA(m)->dmark == (RUBY_DATA_FUNC)bm_mark) { - return Qtrue; - } - return Qfalse; -} - -/* - * call-seq: - * define_method(symbol, method) => new_method - * define_method(symbol) { block } => proc - * - * Defines an instance method in the receiver. The _method_ - * parameter can be a +Proc+ or +Method+ object. - * If a block is specified, it is used as the method body. This block - * is evaluated using <code>instance_eval</code>, a point that is - * tricky to demonstrate because <code>define_method</code> is private. - * (This is why we resort to the +send+ hack in this example.) - * - * class A - * def fred - * puts "In Fred" - * end - * def create_method(name, &block) - * self.class.send(:define_method, name, &block) - * end - * define_method(:wilma) { puts "Charge it!" } - * end - * class B < A - * define_method(:barney, instance_method(:fred)) - * end - * a = B.new - * a.barney - * a.wilma - * a.create_method(:betty) { p self } - * a.betty - * - * <em>produces:</em> - * - * In Fred - * Charge it! - * #<B:0x401b39e8> - */ - -static VALUE -rb_mod_define_method(argc, argv, mod) - int argc; - VALUE *argv; - VALUE mod; -{ - ID id; - VALUE body; - NODE *node; - int noex; - - if (argc == 1) { - id = rb_to_id(argv[0]); - body = proc_lambda(); - } - else if (argc == 2) { - id = rb_to_id(argv[0]); - body = argv[1]; - if (!rb_obj_is_method(body) && !rb_obj_is_proc(body)) { - rb_raise(rb_eTypeError, "wrong argument type %s (expected Proc/Method)", - rb_obj_classname(body)); - } - } - else { - rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc); - } - if (RDATA(body)->dmark == (RUBY_DATA_FUNC)bm_mark) { - node = NEW_DMETHOD(method_unbind(body)); - } - else if (RDATA(body)->dmark == (RUBY_DATA_FUNC)blk_mark) { - struct BLOCK *block; - - body = proc_clone(body); - Data_Get_Struct(body, struct BLOCK, block); - block->frame.last_func = id; - block->frame.orig_func = id; - block->frame.last_class = mod; - node = NEW_BMETHOD(body); - } - else { - /* type error */ - rb_raise(rb_eTypeError, "wrong argument type (expected Proc/Method)"); - } - - noex = NOEX_PUBLIC; - if (ruby_cbase == mod) { - if (SCOPE_TEST(SCOPE_PRIVATE)) { - noex = NOEX_PRIVATE; - } - else if (SCOPE_TEST(SCOPE_PROTECTED)) { - noex = NOEX_PROTECTED; - } - } - rb_add_method(mod, id, node, noex); - return body; -} - -/* - * <code>Proc</code> objects are blocks of code that have been bound to - * a set of local variables. Once bound, the code may be called in - * different contexts and still access those variables. - * - * def gen_times(factor) - * return Proc.new {|n| n*factor } - * end - * - * times3 = gen_times(3) - * times5 = gen_times(5) - * - * times3.call(12) #=> 36 - * times5.call(5) #=> 25 - * times3.call(times5.call(4)) #=> 60 - * - */ - -void -Init_Proc() -{ - rb_eLocalJumpError = rb_define_class("LocalJumpError", rb_eStandardError); - rb_define_method(rb_eLocalJumpError, "exit_value", localjump_xvalue, 0); - rb_define_method(rb_eLocalJumpError, "reason", localjump_reason, 0); - - rb_global_variable(&exception_error); - exception_error = rb_exc_new2(rb_eFatal, "exception reentered"); - OBJ_TAINT(exception_error); - OBJ_FREEZE(exception_error); - - rb_eSysStackError = rb_define_class("SystemStackError", rb_eStandardError); - rb_global_variable(&sysstack_error); - sysstack_error = rb_exc_new2(rb_eSysStackError, "stack level too deep"); - OBJ_TAINT(sysstack_error); - OBJ_FREEZE(sysstack_error); - - rb_cProc = rb_define_class("Proc", rb_cObject); - rb_undef_alloc_func(rb_cProc); - rb_define_singleton_method(rb_cProc, "new", proc_s_new, -1); - - rb_define_method(rb_cProc, "clone", proc_clone, 0); - rb_define_method(rb_cProc, "dup", proc_dup, 0); - rb_define_method(rb_cProc, "call", proc_call, -2); - rb_define_method(rb_cProc, "arity", proc_arity, 0); - rb_define_method(rb_cProc, "[]", proc_call, -2); - rb_define_method(rb_cProc, "==", proc_eq, 1); - rb_define_method(rb_cProc, "to_s", proc_to_s, 0); - rb_define_method(rb_cProc, "to_proc", proc_to_self, 0); - rb_define_method(rb_cProc, "binding", proc_binding, 0); - - rb_define_global_function("proc", proc_lambda, 0); - rb_define_global_function("lambda", proc_lambda, 0); - - rb_cMethod = rb_define_class("Method", rb_cObject); - rb_undef_alloc_func(rb_cMethod); - rb_undef_method(CLASS_OF(rb_cMethod), "new"); - rb_define_method(rb_cMethod, "==", method_eq, 1); - rb_define_method(rb_cMethod, "clone", method_clone, 0); - rb_define_method(rb_cMethod, "call", method_call, -1); - rb_define_method(rb_cMethod, "[]", method_call, -1); - rb_define_method(rb_cMethod, "arity", method_arity, 0); - rb_define_method(rb_cMethod, "inspect", method_inspect, 0); - rb_define_method(rb_cMethod, "to_s", method_inspect, 0); - rb_define_method(rb_cMethod, "to_proc", method_proc, 0); - rb_define_method(rb_cMethod, "unbind", method_unbind, 0); - rb_define_method(rb_mKernel, "method", rb_obj_method, 1); - - rb_cUnboundMethod = rb_define_class("UnboundMethod", rb_cObject); - rb_undef_alloc_func(rb_cUnboundMethod); - rb_undef_method(CLASS_OF(rb_cUnboundMethod), "new"); - rb_define_method(rb_cUnboundMethod, "==", method_eq, 1); - rb_define_method(rb_cUnboundMethod, "clone", method_clone, 0); - rb_define_method(rb_cUnboundMethod, "arity", method_arity, 0); - rb_define_method(rb_cUnboundMethod, "inspect", method_inspect, 0); - rb_define_method(rb_cUnboundMethod, "to_s", method_inspect, 0); - rb_define_method(rb_cUnboundMethod, "bind", umethod_bind, 1); - rb_define_method(rb_cModule, "instance_method", rb_mod_method, 1); -} - -/* - * Objects of class <code>Binding</code> encapsulate the execution - * context at some particular place in the code and retain this context - * for future use. The variables, methods, value of <code>self</code>, - * and possibly an iterator block that can be accessed in this context - * are all retained. Binding objects can be created using - * <code>Kernel#binding</code>, and are made available to the callback - * of <code>Kernel#set_trace_func</code>. - * - * These binding objects can be passed as the second argument of the - * <code>Kernel#eval</code> method, establishing an environment for the - * evaluation. - * - * class Demo - * def initialize(n) - * @secret = n - * end - * def getBinding - * return binding() - * end - * end - * - * k1 = Demo.new(99) - * b1 = k1.getBinding - * k2 = Demo.new(-3) - * b2 = k2.getBinding - * - * eval("@secret", b1) #=> 99 - * eval("@secret", b2) #=> -3 - * eval("@secret") #=> nil - * - * Binding objects have no class-specific methods. - * - */ - -void -Init_Binding() -{ - rb_cBinding = rb_define_class("Binding", rb_cObject); - rb_undef_alloc_func(rb_cBinding); - rb_undef_method(CLASS_OF(rb_cBinding), "new"); - rb_define_method(rb_cBinding, "clone", proc_clone, 0); - rb_define_method(rb_cBinding, "dup", proc_dup, 0); - rb_define_global_function("binding", rb_f_binding, 0); -} - -/* Windows SEH refers data on the stack. */ -#undef SAVE_WIN32_EXCEPTION_LIST -#if defined _WIN32 || defined __CYGWIN__ -#if defined __CYGWIN__ -typedef unsigned long DWORD; -#endif - -static inline DWORD -win32_get_exception_list() -{ - DWORD p; -# if defined _MSC_VER -# ifdef _M_IX86 -# define SAVE_WIN32_EXCEPTION_LIST -# if _MSC_VER >= 1310 - /* warning: unsafe assignment to fs:0 ... this is ok */ -# pragma warning(disable: 4733) -# endif - __asm mov eax, fs:[0]; - __asm mov p, eax; -# endif -# elif defined __GNUC__ -# ifdef __i386__ -# define SAVE_WIN32_EXCEPTION_LIST - __asm__("movl %%fs:0,%0" : "=r"(p)); -# endif -# elif defined __BORLANDC__ -# define SAVE_WIN32_EXCEPTION_LIST - __emit__(0x64, 0xA1, 0, 0, 0, 0); /* mov eax, fs:[0] */ - p = _EAX; -# endif - return p; -} - -static inline void -win32_set_exception_list(p) - DWORD p; -{ -# if defined _MSC_VER -# ifdef _M_IX86 - __asm mov eax, p; - __asm mov fs:[0], eax; -# endif -# elif defined __GNUC__ -# ifdef __i386__ - __asm__("movl %0,%%fs:0" :: "r"(p)); -# endif -# elif defined __BORLANDC__ - _EAX = p; - __emit__(0x64, 0xA3, 0, 0, 0, 0); /* mov fs:[0], eax */ -# endif -} - -#if !defined SAVE_WIN32_EXCEPTION_LIST && !defined _WIN32_WCE -# error unsupported platform -#endif -#endif - -int rb_thread_pending = 0; - -VALUE rb_cThread; - -extern VALUE rb_last_status; - -#define WAIT_FD (1<<0) -#define WAIT_SELECT (1<<1) -#define WAIT_TIME (1<<2) -#define WAIT_JOIN (1<<3) -#define WAIT_PID (1<<4) - -/* +infty, for this purpose */ -#define DELAY_INFTY 1E30 - -#if !defined HAVE_PAUSE -# if defined _WIN32 && !defined __CYGWIN__ -# define pause() Sleep(INFINITE) -# else -# define pause() sleep(0x7fffffff) -# endif -#endif - -#define THREAD_TERMINATING 0x400 /* persistent flag */ -#define THREAD_NO_ENSURE 0x800 /* persistent flag */ -#define THREAD_FLAGS_MASK 0xfc00 /* mask for persistent flags */ - -#define FOREACH_THREAD_FROM(f,x) x = f; do { x = x->next; -#define END_FOREACH_FROM(f,x) } while (x != f) - -#define FOREACH_THREAD(x) FOREACH_THREAD_FROM(curr_thread,x) -#define END_FOREACH(x) END_FOREACH_FROM(curr_thread,x) - -struct thread_status_t { - NODE *node; - - int tracing; - VALUE errinfo; - VALUE last_status; - VALUE last_line; - VALUE last_match; - - int safe; - - enum rb_thread_status status; - int wait_for; - int fd; - fd_set readfds; - fd_set writefds; - fd_set exceptfds; - int select_value; - double delay; - rb_thread_t join; -}; - -#define THREAD_COPY_STATUS(src, dst) (void)( \ - (dst)->node = (src)->node, \ - \ - (dst)->tracing = (src)->tracing, \ - (dst)->errinfo = (src)->errinfo, \ - (dst)->last_status = (src)->last_status, \ - (dst)->last_line = (src)->last_line, \ - (dst)->last_match = (src)->last_match, \ - \ - (dst)->safe = (src)->safe, \ - \ - (dst)->status = (src)->status, \ - (dst)->wait_for = (src)->wait_for, \ - (dst)->fd = (src)->fd, \ - (dst)->readfds = (src)->readfds, \ - (dst)->writefds = (src)->writefds, \ - (dst)->exceptfds = (src)->exceptfds, \ - (dst)->select_value = (src)->select_value, \ - (dst)->delay = (src)->delay, \ - (dst)->join = (src)->join, \ - 0) - -int -rb_thread_set_raised(th) - rb_thread_t th; -{ - if (th->flags & RAISED_EXCEPTION) { - return 1; - } - th->flags |= RAISED_EXCEPTION; - return 0; -} - -int -rb_thread_reset_raised(th) - rb_thread_t th; -{ - if (!(th->flags & RAISED_EXCEPTION)) { - return 0; - } - th->flags &= ~RAISED_EXCEPTION; - return 1; -} - -static int -thread_no_ensure() -{ - return ((curr_thread->flags & THREAD_NO_ENSURE) == THREAD_NO_ENSURE); -} - -static void rb_thread_ready _((rb_thread_t)); - -static VALUE run_trap_eval _((VALUE)); -static VALUE -run_trap_eval(arg) - VALUE arg; -{ - VALUE *p = (VALUE *)arg; - return rb_eval_cmd(p[0], p[1], (int)p[2]); -} - -static VALUE -rb_trap_eval(cmd, sig, safe) - VALUE cmd; - int sig, safe; -{ - int state; - VALUE val = Qnil; /* OK */ - volatile struct thread_status_t save; - VALUE arg[3]; - - arg[0] = cmd; - arg[1] = rb_ary_new3(1, INT2FIX(sig)); - arg[2] = (VALUE)safe; - THREAD_COPY_STATUS(curr_thread, &save); - rb_thread_ready(curr_thread); - PUSH_ITER(ITER_NOT); - val = rb_protect(run_trap_eval, (VALUE)&arg, &state); - POP_ITER(); - THREAD_COPY_STATUS(&save, curr_thread); - - if (state) { - rb_trap_immediate = 0; - rb_thread_ready(curr_thread); - JUMP_TAG(state); - } - - if (curr_thread->status == THREAD_STOPPED) { - rb_thread_schedule(); - } - errno = EINTR; - - return val; -} - -static const char * -thread_status_name(status) - enum rb_thread_status status; -{ - switch (status) { - case THREAD_RUNNABLE: - return "run"; - case THREAD_STOPPED: - return "sleep"; - case THREAD_TO_KILL: - return "aborting"; - case THREAD_KILLED: - return "dead"; - default: - return "unknown"; - } -} - -/* $SAFE accessor */ -void -rb_set_safe_level(level) - int level; -{ - if (level > ruby_safe_level) { - if (level > SAFE_LEVEL_MAX) level = SAFE_LEVEL_MAX; - ruby_safe_level = level; - curr_thread->safe = level; - } -} - -static VALUE -safe_getter() -{ - return INT2NUM(ruby_safe_level); -} - -static void -safe_setter(val) - VALUE val; -{ - int level = NUM2INT(val); - - if (level < ruby_safe_level) { - rb_raise(rb_eSecurityError, "tried to downgrade safe level from %d to %d", - ruby_safe_level, level); - } - if (level > SAFE_LEVEL_MAX) level = SAFE_LEVEL_MAX; - ruby_safe_level = level; - curr_thread->safe = level; -} - -/* Return the current time as a floating-point number */ -static double -timeofday() -{ - struct timeval tv; - gettimeofday(&tv, NULL); - return (double)tv.tv_sec + (double)tv.tv_usec * 1e-6; -} - -#define STACK(addr) (th->stk_pos<(VALUE*)(addr) && (VALUE*)(addr)<th->stk_pos+th->stk_len) -#define ADJ(addr) (void*)(STACK(addr)?(((VALUE*)(addr)-th->stk_pos)+th->stk_ptr):(VALUE*)(addr)) -static void -thread_mark(th) - rb_thread_t th; -{ - struct FRAME *frame; - struct BLOCK *block; - - rb_gc_mark(th->result); - rb_gc_mark(th->thread); - if (th->join) rb_gc_mark(th->join->thread); - - rb_gc_mark(th->klass); - rb_gc_mark(th->wrapper); - rb_gc_mark((VALUE)th->cref); - - rb_gc_mark((VALUE)th->scope); - rb_gc_mark((VALUE)th->dyna_vars); - rb_gc_mark(th->errinfo); - rb_gc_mark(th->last_status); - rb_gc_mark(th->last_line); - rb_gc_mark(th->last_match); - rb_mark_tbl(th->locals); - rb_gc_mark(th->thgroup); - rb_gc_mark_maybe(th->sandbox); - - /* mark data in copied stack */ - if (th == curr_thread) return; - if (th->status == THREAD_KILLED) return; - if (th->stk_len == 0) return; /* stack not active, no need to mark. */ - if (th->stk_ptr) { - rb_gc_mark_locations(th->stk_ptr, th->stk_ptr+th->stk_len); -#if defined(THINK_C) || defined(__human68k__) - rb_gc_mark_locations(th->stk_ptr+2, th->stk_ptr+th->stk_len+2); -#endif -#ifdef __ia64 - if (th->bstr_ptr) { - rb_gc_mark_locations(th->bstr_ptr, th->bstr_ptr+th->bstr_len); - } -#endif - } - frame = th->frame; - while (frame && frame != top_frame) { - frame = ADJ(frame); - rb_gc_mark_frame(frame); - if (frame->tmp) { - struct FRAME *tmp = frame->tmp; - - while (tmp && tmp != top_frame) { - tmp = ADJ(tmp); - rb_gc_mark_frame(tmp); - tmp = tmp->prev; - } - } - frame = frame->prev; - } - block = th->block; - while (block) { - block = ADJ(block); - rb_gc_mark_frame(&block->frame); - block = block->prev; - } -} - -static int -mark_loading_thread(key, value, lev) - ID key; - VALUE value; - int lev; -{ - rb_gc_mark(((rb_thread_t)value)->thread); - return ST_CONTINUE; -} - -void -rb_gc_mark_threads() -{ - rb_thread_t th; - - /* static global mark */ - rb_gc_mark((VALUE)ruby_cref); - - if (!curr_thread) return; - rb_gc_mark(main_thread->thread); - rb_gc_mark(curr_thread->thread); - FOREACH_THREAD_FROM(main_thread, th) { - switch (th->status) { - case THREAD_TO_KILL: - case THREAD_RUNNABLE: - break; - case THREAD_STOPPED: - if (th->wait_for) break; - default: - continue; - } - rb_gc_mark(th->thread); - } END_FOREACH_FROM(main_thread, th); - if (loading_tbl) st_foreach(loading_tbl, mark_loading_thread, 0); -} - -void -rb_gc_abort_threads() -{ - rb_thread_t th; - - if (!main_thread) - return; - - FOREACH_THREAD_FROM(main_thread, th) { - if (FL_TEST(th->thread, FL_MARK)) continue; - if (th->status == THREAD_STOPPED) { - th->status = THREAD_TO_KILL; - rb_gc_mark(th->thread); - } - } END_FOREACH_FROM(main_thread, th); -} - -static void -thread_free(th) - rb_thread_t th; -{ - if (th->stk_ptr) free(th->stk_ptr); - th->stk_ptr = 0; -#ifdef __ia64 - if (th->bstr_ptr) free(th->bstr_ptr); - th->bstr_ptr = 0; -#endif - if (th->locals) st_free_table(th->locals); - if (th->status != THREAD_KILLED) { - if (th->prev) th->prev->next = th->next; - if (th->next) th->next->prev = th->prev; - } - if (th != main_thread) free(th); -} - -static rb_thread_t -rb_thread_check(data) - VALUE data; -{ - if (TYPE(data) != T_DATA || RDATA(data)->dmark != (RUBY_DATA_FUNC)thread_mark) { - rb_raise(rb_eTypeError, "wrong argument type %s (expected Thread)", - rb_obj_classname(data)); - } - return (rb_thread_t)RDATA(data)->data; -} - -static VALUE rb_thread_raise _((int, VALUE*, rb_thread_t)); - -static VALUE th_raise_exception; -static NODE *th_raise_node; -static VALUE th_cmd; -static int th_sig, th_safe; - -#define RESTORE_NORMAL 1 -#define RESTORE_FATAL 2 -#define RESTORE_INTERRUPT 3 -#define RESTORE_TRAP 4 -#define RESTORE_RAISE 5 -#define RESTORE_SIGNAL 6 -#define RESTORE_EXIT 7 - -extern VALUE *rb_gc_stack_start; -#ifdef __ia64 -extern VALUE *rb_gc_register_stack_start; -#endif - -static void -rb_thread_save_context(th) - rb_thread_t th; -{ - VALUE *pos; - int len; - static VALUE tval; - - len = ruby_stack_length(&pos); - th->stk_len = 0; - th->stk_pos = pos; - if (len > th->stk_max) { - VALUE *ptr = realloc(th->stk_ptr, sizeof(VALUE) * len); - if (!ptr) rb_memerror(); - th->stk_ptr = ptr; - th->stk_max = len; - } - th->stk_len = len; - FLUSH_REGISTER_WINDOWS; - MEMCPY(th->stk_ptr, th->stk_pos, VALUE, th->stk_len); -#ifdef __ia64 - th->bstr_pos = rb_gc_register_stack_start; - len = (VALUE*)rb_ia64_bsp() - th->bstr_pos; - th->bstr_len = 0; - if (len > th->bstr_max) { - VALUE *ptr = realloc(th->bstr_ptr, sizeof(VALUE) * len); - if (!ptr) rb_memerror(); - th->bstr_ptr = ptr; - th->bstr_max = len; - } - th->bstr_len = len; - rb_ia64_flushrs(); - MEMCPY(th->bstr_ptr, th->bstr_pos, VALUE, th->bstr_len); -#endif -#ifdef SAVE_WIN32_EXCEPTION_LIST - th->win32_exception_list = win32_get_exception_list(); -#endif - - th->frame = ruby_frame; - th->scope = ruby_scope; - ruby_scope->flags |= SCOPE_DONT_RECYCLE; - th->klass = ruby_class; - th->wrapper = ruby_wrapper; - th->cref = ruby_cref; - th->dyna_vars = ruby_dyna_vars; - th->block = ruby_block; - th->flags &= THREAD_FLAGS_MASK; - th->flags |= (rb_trap_immediate<<8) | scope_vmode; - th->iter = ruby_iter; - th->tag = prot_tag; - th->tracing = tracing; - th->errinfo = ruby_errinfo; - th->last_status = rb_last_status; - tval = rb_lastline_get(); - rb_lastline_set(th->last_line); - th->last_line = tval; - tval = rb_backref_get(); - rb_backref_set(th->last_match); - th->last_match = tval; - th->safe = ruby_safe_level; - - th->node = ruby_current_node; - if (ruby_sandbox_save != NULL) - { - ruby_sandbox_save(th); - } -} - -static int -rb_thread_switch(n) - int n; -{ - rb_trap_immediate = (curr_thread->flags&0x100)?1:0; - switch (n) { - case 0: - return 0; - case RESTORE_FATAL: - JUMP_TAG(TAG_FATAL); - break; - case RESTORE_INTERRUPT: - rb_interrupt(); - break; - case RESTORE_TRAP: - rb_trap_eval(th_cmd, th_sig, th_safe); - break; - case RESTORE_RAISE: - ruby_frame->last_func = 0; - ruby_current_node = th_raise_node; - rb_raise_jump(th_raise_exception); - break; - case RESTORE_SIGNAL: - rb_thread_signal_raise(th_sig); - break; - case RESTORE_EXIT: - ruby_errinfo = th_raise_exception; - ruby_current_node = th_raise_node; - if (!rb_obj_is_kind_of(ruby_errinfo, rb_eSystemExit)) { - terminate_process(EXIT_FAILURE, ruby_errinfo); - } - rb_exc_raise(th_raise_exception); - break; - case RESTORE_NORMAL: - default: - break; - } - return 1; -} - -#define THREAD_SAVE_CONTEXT(th) \ - (rb_thread_switch((FLUSH_REGISTER_WINDOWS, ruby_setjmp(rb_thread_save_context(th), (th)->context)))) - -NORETURN(static void rb_thread_restore_context _((rb_thread_t,int))); -NORETURN(NOINLINE(static void rb_thread_restore_context_0(rb_thread_t,int,void*))); -NORETURN(NOINLINE(static void stack_extend(rb_thread_t, int, VALUE *))); - -static void -rb_thread_restore_context_0(rb_thread_t th, int exit, void *vp) -{ - static rb_thread_t tmp; - static int ex; - static VALUE tval; - - rb_trap_immediate = 0; /* inhibit interrupts from here */ - if (ruby_sandbox_restore != NULL) - { - ruby_sandbox_restore(th); - } - ruby_frame = th->frame; - ruby_scope = th->scope; - ruby_class = th->klass; - ruby_wrapper = th->wrapper; - ruby_cref = th->cref; - ruby_dyna_vars = th->dyna_vars; - ruby_block = th->block; - scope_vmode = th->flags&SCOPE_MASK; - ruby_iter = th->iter; - prot_tag = th->tag; - tracing = th->tracing; - ruby_errinfo = th->errinfo; - rb_last_status = th->last_status; - ruby_safe_level = th->safe; - - ruby_current_node = th->node; - -#ifdef SAVE_WIN32_EXCEPTION_LIST - win32_set_exception_list(th->win32_exception_list); -#endif - tmp = th; - ex = exit; - FLUSH_REGISTER_WINDOWS; - MEMCPY(tmp->stk_pos, tmp->stk_ptr, VALUE, tmp->stk_len); -#ifdef __ia64 - MEMCPY(tmp->bstr_pos, tmp->bstr_ptr, VALUE, tmp->bstr_len); -#endif - - tval = rb_lastline_get(); - rb_lastline_set(tmp->last_line); - tmp->last_line = tval; - tval = rb_backref_get(); - rb_backref_set(tmp->last_match); - tmp->last_match = tval; - - ruby_longjmp(tmp->context, ex); -} - -#ifdef __ia64 -#define C(a) rse_##a##0, rse_##a##1, rse_##a##2, rse_##a##3, rse_##a##4 -#define E(a) rse_##a##0= rse_##a##1= rse_##a##2= rse_##a##3= rse_##a##4 -static volatile int C(a), C(b), C(c), C(d), C(e); -static volatile int C(f), C(g), C(h), C(i), C(j); -static volatile int C(k), C(l), C(m), C(n), C(o); -static volatile int C(p), C(q), C(r), C(s), C(t); -int rb_dummy_false = 0; -NORETURN(NOINLINE(static void register_stack_extend(rb_thread_t, int, void *, VALUE *))); -static void -register_stack_extend(rb_thread_t th, int exit, void *vp, VALUE *curr_bsp) -{ - if (rb_dummy_false) { - /* use registers as much as possible */ - E(a) = E(b) = E(c) = E(d) = E(e) = - E(f) = E(g) = E(h) = E(i) = E(j) = - E(k) = E(l) = E(m) = E(n) = E(o) = - E(p) = E(q) = E(r) = E(s) = E(t) = 0; - E(a) = E(b) = E(c) = E(d) = E(e) = - E(f) = E(g) = E(h) = E(i) = E(j) = - E(k) = E(l) = E(m) = E(n) = E(o) = - E(p) = E(q) = E(r) = E(s) = E(t) = 0; - } - if (curr_bsp < th->bstr_pos+th->bstr_len) { - register_stack_extend(th, exit, &exit, (VALUE*)rb_ia64_bsp()); - } - rb_thread_restore_context_0(th, exit, &exit); -} -#undef C -#undef E -#endif - -# if defined(_MSC_VER) && _MSC_VER >= 1300 -__declspec(noinline) static void stack_extend(rb_thread_t, int, VALUE*); -# endif -static void -stack_extend(rb_thread_t th, int exit, VALUE *addr_in_prev_frame) -{ -#define STACK_PAD_SIZE 1024 - VALUE space[STACK_PAD_SIZE]; - -#if STACK_GROW_DIRECTION < 0 - if (addr_in_prev_frame > th->stk_pos) stack_extend(th, exit, &space[0]); -#elif STACK_GROW_DIRECTION > 0 - if (addr_in_prev_frame < th->stk_pos + th->stk_len) stack_extend(th, exit, &space[STACK_PAD_SIZE-1]); -#else - if (addr_in_prev_frame < rb_gc_stack_start) { - /* Stack grows downward */ - if (addr_in_prev_frame > th->stk_pos) stack_extend(th, exit, &space[0]); - } - else { - /* Stack grows upward */ - if (addr_in_prev_frame < th->stk_pos + th->stk_len) stack_extend(th, exit, &space[STACK_PAD_SIZE-1]); - } -#endif -#ifdef __ia64 - register_stack_extend(th, exit, space, (VALUE*)rb_ia64_bsp()); -#else - rb_thread_restore_context_0(th, exit, space); -#endif -} - -static void -rb_thread_restore_context(th, exit) - rb_thread_t th; - int exit; -{ - VALUE v; - if (!th->stk_ptr) rb_bug("unsaved context"); - stack_extend(th, exit, &v); -} - -static void -rb_thread_ready(th) - rb_thread_t th; -{ - th->wait_for = 0; - if (th->status != THREAD_TO_KILL) { - th->status = THREAD_RUNNABLE; - } -} - -static void -rb_thread_die(th) - rb_thread_t th; -{ - th->thgroup = 0; - th->status = THREAD_KILLED; - if (th->stk_ptr) free(th->stk_ptr); - th->stk_ptr = 0; -} - -static void -rb_thread_remove(th) - rb_thread_t th; -{ - if (th->status == THREAD_KILLED) return; - - rb_thread_ready(th); - rb_thread_die(th); - th->prev->next = th->next; - th->next->prev = th->prev; -} - -static int -rb_thread_dead(th) - rb_thread_t th; -{ - return th->status == THREAD_KILLED; -} - -void -rb_thread_fd_close(fd) - int fd; -{ - rb_thread_t th; - - FOREACH_THREAD(th) { - if (((th->wait_for & WAIT_FD) && fd == th->fd) || - ((th->wait_for & WAIT_SELECT) && (fd < th->fd) && - (FD_ISSET(fd, &th->readfds) || - FD_ISSET(fd, &th->writefds) || - FD_ISSET(fd, &th->exceptfds)))) { - VALUE exc = rb_exc_new2(rb_eIOError, "stream closed"); - rb_thread_raise(1, &exc, th); - } - } - END_FOREACH(th); -} - -NORETURN(static void rb_thread_main_jump _((VALUE, int))); -static void -rb_thread_main_jump(err, tag) - VALUE err; - int tag; -{ - curr_thread = main_thread; - th_raise_exception = err; - th_raise_node = ruby_current_node; - rb_thread_restore_context(main_thread, tag); -} - -NORETURN(static void rb_thread_deadlock _((void))); -static void -rb_thread_deadlock() -{ - char msg[21+SIZEOF_LONG*2]; - VALUE e; - - sprintf(msg, "Thread(0x%lx): deadlock", curr_thread->thread); - e = rb_exc_new2(rb_eFatal, msg); - if (curr_thread == main_thread) { - rb_exc_raise(e); - } - rb_thread_main_jump(e, RESTORE_RAISE); -} - -static void -copy_fds(dst, src, max) - fd_set *dst, *src; - int max; -{ - int n = 0; - int i; - - for (i=0; i<=max; i++) { - if (FD_ISSET(i, src)) { - n = i; - FD_SET(i, dst); - } - } -} - -static int -match_fds(dst, src, max) - fd_set *dst, *src; - int max; -{ - int i; - - for (i=0; i<=max; i++) { - if (FD_ISSET(i, src) && FD_ISSET(i, dst)) { - return Qtrue; - } - } - return Qfalse; -} - -static int -intersect_fds(src, dst, max) - fd_set *src, *dst; - int max; -{ - int i, n = 0; - - for (i=0; i<=max; i++) { - if (FD_ISSET(i, dst)) { - if (FD_ISSET(i, src)) { - /* Wake up only one thread per fd. */ - FD_CLR(i, src); - n++; - } - else { - FD_CLR(i, dst); - } - } - } - return n; -} - -static int -find_bad_fds(dst, src, max) - fd_set *dst, *src; - int max; -{ - int i, test = Qfalse; - - for (i=0; i<=max; i++) { - if (FD_ISSET(i, src) && !FD_ISSET(i, dst)) { - FD_CLR(i, src); - test = Qtrue; - } - } - return test; -} - -void -rb_thread_schedule() -{ - rb_thread_t next; /* OK */ - rb_thread_t th; - rb_thread_t curr; - int found = 0; - - fd_set readfds; - fd_set writefds; - fd_set exceptfds; - struct timeval delay_tv, *delay_ptr; - double delay, now; /* OK */ - int n, max; - int need_select = 0; - int select_timeout = 0; - -#ifdef HAVE_NATIVETHREAD - if (!is_ruby_native_thread()) { - rb_bug("cross-thread violation on rb_thread_schedule()"); - } -#endif - rb_thread_pending = 0; - if (curr_thread == curr_thread->next - && curr_thread->status == THREAD_RUNNABLE) - return; - - next = 0; - curr = curr_thread; /* starting thread */ - - while (curr->status == THREAD_KILLED) { - curr = curr->prev; - } - - again: - max = -1; - FD_ZERO(&readfds); - FD_ZERO(&writefds); - FD_ZERO(&exceptfds); - delay = DELAY_INFTY; - now = -1.0; - - FOREACH_THREAD_FROM(curr, th) { - if (!found && th->status <= THREAD_RUNNABLE) { - found = 1; - } - if (th->status != THREAD_STOPPED) continue; - if (th->wait_for & WAIT_JOIN) { - if (rb_thread_dead(th->join)) { - th->status = THREAD_RUNNABLE; - found = 1; - } - } - if (th->wait_for & WAIT_FD) { - FD_SET(th->fd, &readfds); - if (max < th->fd) max = th->fd; - need_select = 1; - } - if (th->wait_for & WAIT_SELECT) { - copy_fds(&readfds, &th->readfds, th->fd); - copy_fds(&writefds, &th->writefds, th->fd); - copy_fds(&exceptfds, &th->exceptfds, th->fd); - if (max < th->fd) max = th->fd; - need_select = 1; - if (th->wait_for & WAIT_TIME) { - select_timeout = 1; - } - th->select_value = 0; - } - if (th->wait_for & WAIT_TIME) { - double th_delay; - - if (now < 0.0) now = timeofday(); - th_delay = th->delay - now; - if (th_delay <= 0.0) { - th->status = THREAD_RUNNABLE; - found = 1; - } - else if (th_delay < delay) { - delay = th_delay; - need_select = 1; - } - else if (th->delay == DELAY_INFTY) { - need_select = 1; - } - } - } - END_FOREACH_FROM(curr, th); - - /* Do the select if needed */ - if (need_select) { - /* Convert delay to a timeval */ - /* If a thread is runnable, just poll */ - if (found) { - delay_tv.tv_sec = 0; - delay_tv.tv_usec = 0; - delay_ptr = &delay_tv; - } - else if (delay == DELAY_INFTY) { - delay_ptr = 0; - } - else { - delay_tv.tv_sec = delay; - delay_tv.tv_usec = (delay - (double)delay_tv.tv_sec)*1e6; - delay_ptr = &delay_tv; - } - - n = select(max+1, &readfds, &writefds, &exceptfds, delay_ptr); - if (n < 0) { - int e = errno; - - if (rb_trap_pending) rb_trap_exec(); - if (e == EINTR) goto again; -#ifdef ERESTART - if (e == ERESTART) goto again; -#endif - FOREACH_THREAD_FROM(curr, th) { - if (th->wait_for & WAIT_SELECT) { - int v = 0; - - v |= find_bad_fds(&readfds, &th->readfds, th->fd); - v |= find_bad_fds(&writefds, &th->writefds, th->fd); - v |= find_bad_fds(&exceptfds, &th->exceptfds, th->fd); - if (v) { - th->select_value = n; - n = max; - } - } - } - END_FOREACH_FROM(curr, th); - } - if (select_timeout && n == 0) { - if (now < 0.0) now = timeofday(); - FOREACH_THREAD_FROM(curr, th) { - if (((th->wait_for&(WAIT_SELECT|WAIT_TIME)) == (WAIT_SELECT|WAIT_TIME)) && - th->delay <= now) { - th->status = THREAD_RUNNABLE; - th->wait_for = 0; - th->select_value = 0; - found = 1; - intersect_fds(&readfds, &th->readfds, max); - intersect_fds(&writefds, &th->writefds, max); - intersect_fds(&exceptfds, &th->exceptfds, max); - } - } - END_FOREACH_FROM(curr, th); - } - if (n > 0) { - now = -1.0; - /* Some descriptors are ready. - Make the corresponding threads runnable. */ - FOREACH_THREAD_FROM(curr, th) { - if ((th->wait_for&WAIT_FD) && FD_ISSET(th->fd, &readfds)) { - /* Wake up only one thread per fd. */ - FD_CLR(th->fd, &readfds); - th->status = THREAD_RUNNABLE; - th->fd = 0; - th->wait_for = 0; - found = 1; - } - if ((th->wait_for&WAIT_SELECT) && - (match_fds(&readfds, &th->readfds, max) || - match_fds(&writefds, &th->writefds, max) || - match_fds(&exceptfds, &th->exceptfds, max))) { - /* Wake up only one thread per fd. */ - th->status = THREAD_RUNNABLE; - th->wait_for = 0; - n = intersect_fds(&readfds, &th->readfds, max) + - intersect_fds(&writefds, &th->writefds, max) + - intersect_fds(&exceptfds, &th->exceptfds, max); - th->select_value = n; - found = 1; - } - } - END_FOREACH_FROM(curr, th); - } - /* The delays for some of the threads should have expired. - Go through the loop once more, to check the delays. */ - if (!found && delay != DELAY_INFTY) - goto again; - } - - FOREACH_THREAD_FROM(curr, th) { - if (th->status == THREAD_TO_KILL) { - next = th; - break; - } - if (th->status == THREAD_RUNNABLE && th->stk_ptr) { - if (!next || next->priority < th->priority) - next = th; - } - } - END_FOREACH_FROM(curr, th); - - if (!next) { - /* raise fatal error to main thread */ - curr_thread->node = ruby_current_node; - if (curr->next == curr) { - TRAP_BEG; - pause(); - TRAP_END; - } - FOREACH_THREAD_FROM(curr, th) { - warn_printf("deadlock 0x%lx: %s:", - th->thread, thread_status_name(th->status)); - if (th->wait_for & WAIT_FD) warn_printf("F(%d)", th->fd); - if (th->wait_for & WAIT_SELECT) warn_printf("S"); - if (th->wait_for & WAIT_TIME) warn_printf("T(%f)", th->delay); - if (th->wait_for & WAIT_JOIN) - warn_printf("J(0x%lx)", th->join ? th->join->thread : 0); - if (th->wait_for & WAIT_PID) warn_printf("P"); - if (!th->wait_for) warn_printf("-"); - warn_printf(" %s - %s:%d\n", - th==main_thread ? "(main)" : "", - th->node->nd_file, nd_line(th->node)); - } - END_FOREACH_FROM(curr, th); - next = main_thread; - rb_thread_ready(next); - next->status = THREAD_TO_KILL; - if (!rb_thread_dead(curr_thread)) { - rb_thread_save_context(curr_thread); - } - rb_thread_deadlock(); - } - next->wait_for = 0; - if (next->status == THREAD_RUNNABLE && next == curr_thread) { - return; - } - - /* context switch */ - if (curr == curr_thread) { - if (THREAD_SAVE_CONTEXT(curr)) { - return; - } - } - - curr_thread = next; - if (next->status == THREAD_TO_KILL) { - if (!(next->flags & THREAD_TERMINATING)) { - next->flags |= THREAD_TERMINATING; - /* terminate; execute ensure-clause if any */ - rb_thread_restore_context(next, RESTORE_FATAL); - } - } - rb_thread_restore_context(next, RESTORE_NORMAL); -} - -void -rb_thread_wait_fd(fd) - int fd; -{ - if (rb_thread_critical) return; - if (ruby_in_compile) return; - if (curr_thread == curr_thread->next) return; - if (curr_thread->status == THREAD_TO_KILL) return; - - curr_thread->status = THREAD_STOPPED; - curr_thread->fd = fd; - curr_thread->wait_for = WAIT_FD; - rb_thread_schedule(); -} - -int -rb_thread_fd_writable(fd) - int fd; -{ - if (rb_thread_critical) return Qtrue; - if (curr_thread == curr_thread->next) return Qtrue; - if (curr_thread->status == THREAD_TO_KILL) return Qtrue; - if (curr_thread->status == THREAD_KILLED) return Qtrue; - - curr_thread->status = THREAD_STOPPED; - FD_ZERO(&curr_thread->readfds); - FD_ZERO(&curr_thread->writefds); - FD_SET(fd, &curr_thread->writefds); - FD_ZERO(&curr_thread->exceptfds); - curr_thread->fd = fd+1; - curr_thread->wait_for = WAIT_SELECT; - rb_thread_schedule(); - return Qfalse; -} - -void -rb_thread_wait_for(time) - struct timeval time; -{ - double date; - - if (rb_thread_critical || - curr_thread == curr_thread->next || - curr_thread->status == THREAD_TO_KILL) { - int n; - int thr_critical = rb_thread_critical; -#ifndef linux - double d, limit; - limit = timeofday()+(double)time.tv_sec+(double)time.tv_usec*1e-6; -#endif - for (;;) { - rb_thread_critical = Qtrue; - TRAP_BEG; - n = select(0, 0, 0, 0, &time); - rb_thread_critical = thr_critical; - TRAP_END; - if (n == 0) return; - if (n < 0) { - switch (errno) { - case EINTR: -#ifdef ERESTART - case ERESTART: -#endif - break; - default: - rb_sys_fail("sleep"); - } - } -#ifndef linux - d = limit - timeofday(); - - time.tv_sec = (int)d; - time.tv_usec = (int)((d - (int)d)*1e6); - if (time.tv_usec < 0) { - time.tv_usec += (long)1e6; - time.tv_sec -= 1; - } - if (time.tv_sec < 0) return; -#endif - } - } - - date = timeofday() + (double)time.tv_sec + (double)time.tv_usec*1e-6; - curr_thread->status = THREAD_STOPPED; - curr_thread->delay = date; - curr_thread->wait_for = WAIT_TIME; - rb_thread_schedule(); -} - -void rb_thread_sleep_forever _((void)); - -int -rb_thread_alone() -{ - return curr_thread == curr_thread->next; -} - -int -rb_thread_select(max, read, write, except, timeout) - int max; - fd_set *read, *write, *except; - struct timeval *timeout; -{ -#ifndef linux - double limit; -#endif - int n; - - if (!read && !write && !except) { - if (!timeout) { - rb_thread_sleep_forever(); - return 0; - } - rb_thread_wait_for(*timeout); - return 0; - } - -#ifndef linux - if (timeout) { - limit = timeofday()+ - (double)timeout->tv_sec+(double)timeout->tv_usec*1e-6; - } -#endif - - if (rb_thread_critical || - curr_thread == curr_thread->next || - curr_thread->status == THREAD_TO_KILL) { -#ifndef linux - struct timeval tv, *tvp = timeout; - - if (timeout) { - tv = *timeout; - tvp = &tv; - } -#else - struct timeval *const tvp = timeout; -#endif - for (;;) { - TRAP_BEG; - n = select(max, read, write, except, tvp); - TRAP_END; - if (n < 0) { - switch (errno) { - case EINTR: -#ifdef ERESTART - case ERESTART: -#endif -#ifndef linux - if (timeout) { - double d = limit - timeofday(); - - tv.tv_sec = (unsigned int)d; - tv.tv_usec = (long)((d-(double)tv.tv_sec)*1e6); - if (tv.tv_sec < 0) tv.tv_sec = 0; - if (tv.tv_usec < 0) tv.tv_usec = 0; - } -#endif - continue; - default: - break; - } - } - return n; - } - } - - curr_thread->status = THREAD_STOPPED; - if (read) curr_thread->readfds = *read; - else FD_ZERO(&curr_thread->readfds); - if (write) curr_thread->writefds = *write; - else FD_ZERO(&curr_thread->writefds); - if (except) curr_thread->exceptfds = *except; - else FD_ZERO(&curr_thread->exceptfds); - curr_thread->fd = max; - curr_thread->wait_for = WAIT_SELECT; - if (timeout) { - curr_thread->delay = timeofday() + - (double)timeout->tv_sec + (double)timeout->tv_usec*1e-6; - curr_thread->wait_for |= WAIT_TIME; - } - rb_thread_schedule(); - if (read) *read = curr_thread->readfds; - if (write) *write = curr_thread->writefds; - if (except) *except = curr_thread->exceptfds; - return curr_thread->select_value; -} - -static int rb_thread_join _((rb_thread_t, double)); - -static int -rb_thread_join(th, limit) - rb_thread_t th; - double limit; -{ - enum rb_thread_status last_status = THREAD_RUNNABLE; - - if (rb_thread_critical) rb_thread_deadlock(); - if (!rb_thread_dead(th)) { - if (th == curr_thread) - rb_raise(rb_eThreadError, "thread 0x%lx tried to join itself", - th->thread); - if ((th->wait_for & WAIT_JOIN) && th->join == curr_thread) - rb_raise(rb_eThreadError, "Thread#join: deadlock 0x%lx - mutual join(0x%lx)", - curr_thread->thread, th->thread); - if (curr_thread->status == THREAD_TO_KILL) - last_status = THREAD_TO_KILL; - if (limit == 0) return Qfalse; - curr_thread->status = THREAD_STOPPED; - curr_thread->join = th; - curr_thread->wait_for = WAIT_JOIN; - curr_thread->delay = timeofday() + limit; - if (limit < DELAY_INFTY) curr_thread->wait_for |= WAIT_TIME; - rb_thread_schedule(); - curr_thread->status = last_status; - if (!rb_thread_dead(th)) return Qfalse; - } - - if (!NIL_P(th->errinfo) && (th->flags & RAISED_EXCEPTION)) { - VALUE oldbt = get_backtrace(th->errinfo); - VALUE errat = make_backtrace(); - VALUE errinfo = rb_obj_dup(th->errinfo); - - if (TYPE(oldbt) == T_ARRAY && RARRAY(oldbt)->len > 0) { - rb_ary_unshift(errat, rb_ary_entry(oldbt, 0)); - } - set_backtrace(errinfo, errat); - rb_exc_raise(errinfo); - } - - return Qtrue; -} - - -/* - * call-seq: - * thr.join => thr - * thr.join(limit) => thr - * - * The calling thread will suspend execution and run <i>thr</i>. Does not - * return until <i>thr</i> exits or until <i>limit</i> seconds have passed. If - * the time limit expires, <code>nil</code> will be returned, otherwise - * <i>thr</i> is returned. - * - * Any threads not joined will be killed when the main program exits. If - * <i>thr</i> had previously raised an exception and the - * <code>abort_on_exception</code> and <code>$DEBUG</code> flags are not set - * (so the exception has not yet been processed) it will be processed at this - * time. - * - * a = Thread.new { print "a"; sleep(10); print "b"; print "c" } - * x = Thread.new { print "x"; Thread.pass; print "y"; print "z" } - * x.join # Let x thread finish, a will be killed on exit. - * - * <em>produces:</em> - * - * axyz - * - * The following example illustrates the <i>limit</i> parameter. - * - * y = Thread.new { 4.times { sleep 0.1; puts 'tick... ' }} - * puts "Waiting" until y.join(0.15) - * - * <em>produces:</em> - * - * tick... - * Waiting - * tick... - * Waitingtick... - * - * - * tick... - */ - -static VALUE -rb_thread_join_m(argc, argv, thread) - int argc; - VALUE *argv; - VALUE thread; -{ - VALUE limit; - double delay = DELAY_INFTY; - rb_thread_t th = rb_thread_check(thread); - - rb_scan_args(argc, argv, "01", &limit); - if (!NIL_P(limit)) delay = rb_num2dbl(limit); - if (!rb_thread_join(th, delay)) - return Qnil; - return thread; -} - - -/* - * call-seq: - * Thread.current => thread - * - * Returns the currently executing thread. - * - * Thread.current #=> #<Thread:0x401bdf4c run> - */ - -VALUE -rb_thread_current() -{ - return curr_thread->thread; -} - - -/* - * call-seq: - * Thread.main => thread - * - * Returns the main thread for the process. - * - * Thread.main #=> #<Thread:0x401bdf4c run> - */ - -VALUE -rb_thread_main() -{ - return main_thread->thread; -} - - -/* - * call-seq: - * Thread.list => array - * - * Returns an array of <code>Thread</code> objects for all threads that are - * either runnable or stopped. - * - * Thread.new { sleep(200) } - * Thread.new { 1000000.times {|i| i*i } } - * Thread.new { Thread.stop } - * Thread.list.each {|t| p t} - * - * <em>produces:</em> - * - * #<Thread:0x401b3e84 sleep> - * #<Thread:0x401b3f38 run> - * #<Thread:0x401b3fb0 sleep> - * #<Thread:0x401bdf4c run> - */ - -VALUE -rb_thread_list() -{ - rb_thread_t th; - VALUE ary = rb_ary_new(); - - FOREACH_THREAD(th) { - switch (th->status) { - case THREAD_RUNNABLE: - case THREAD_STOPPED: - case THREAD_TO_KILL: - rb_ary_push(ary, th->thread); - default: - break; - } - } - END_FOREACH(th); - - return ary; -} - - -/* - * call-seq: - * thr.wakeup => thr - * - * Marks <i>thr</i> as eligible for scheduling (it may still remain blocked on - * I/O, however). Does not invoke the scheduler (see <code>Thread#run</code>). - * - * c = Thread.new { Thread.stop; puts "hey!" } - * c.wakeup - * - * <em>produces:</em> - * - * hey! - */ - -VALUE -rb_thread_wakeup(thread) - VALUE thread; -{ - if (!RTEST(rb_thread_wakeup_alive(thread))) - rb_raise(rb_eThreadError, "killed thread"); - return thread; -} - -VALUE -rb_thread_wakeup_alive(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - - if (th->status == THREAD_KILLED) - return Qnil; - rb_thread_ready(th); - - return thread; -} - - -/* - * call-seq: - * thr.run => thr - * - * Wakes up <i>thr</i>, making it eligible for scheduling. If not in a critical - * section, then invokes the scheduler. - * - * a = Thread.new { puts "a"; Thread.stop; puts "c" } - * Thread.pass - * puts "Got here" - * a.run - * a.join - * - * <em>produces:</em> - * - * a - * Got here - * c - */ - -VALUE -rb_thread_run(thread) - VALUE thread; -{ - rb_thread_wakeup(thread); - if (!rb_thread_critical) rb_thread_schedule(); - - return thread; -} - - -static void -rb_kill_thread(th, flags) - rb_thread_t th; - int flags; -{ - if (th != curr_thread && th->safe < 4) { - rb_secure(4); - } - if (th->status == THREAD_TO_KILL || th->status == THREAD_KILLED) - return; - if (th == th->next || th == main_thread) rb_exit(EXIT_SUCCESS); - - rb_thread_ready(th); - th->flags |= flags; - th->status = THREAD_TO_KILL; - if (!rb_thread_critical) rb_thread_schedule(); -} - - -/* - * call-seq: - * thr.exit => thr - * thr.kill => thr - * thr.terminate => thr - * - * Terminates <i>thr</i> and schedules another thread to be run, returning - * the terminated <code>Thread</code>. If this is the main thread, or the - * last thread, exits the process. - */ - -VALUE -rb_thread_kill(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - - rb_kill_thread(th, 0); - return thread; -} - - -/* - * call-seq: - * thr.exit! => thr - * thr.kill! => thr - * thr.terminate! => thr - * - * Terminates <i>thr</i> without calling ensure clauses and schedules - * another thread to be run, returning the terminated <code>Thread</code>. - * If this is the main thread, or the last thread, exits the process. - * - * See <code>Thread#exit</code> for the safer version. - */ - -static VALUE -rb_thread_kill_bang(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - rb_kill_thread(th, THREAD_NO_ENSURE); - return thread; -} - -/* - * call-seq: - * Thread.kill(thread) => thread - * - * Causes the given <em>thread</em> to exit (see <code>Thread::exit</code>). - * - * count = 0 - * a = Thread.new { loop { count += 1 } } - * sleep(0.1) #=> 0 - * Thread.kill(a) #=> #<Thread:0x401b3d30 dead> - * count #=> 93947 - * a.alive? #=> false - */ - -static VALUE -rb_thread_s_kill(obj, th) - VALUE obj, th; -{ - return rb_thread_kill(th); -} - - -/* - * call-seq: - * Thread.exit => thread - * - * Terminates the currently running thread and schedules another thread to be - * run. If this thread is already marked to be killed, <code>exit</code> - * returns the <code>Thread</code>. If this is the main thread, or the last - * thread, exit the process. - */ - -static VALUE -rb_thread_exit() -{ - return rb_thread_kill(curr_thread->thread); -} - - -/* - * call-seq: - * Thread.pass => nil - * - * Invokes the thread scheduler to pass execution to another thread. - * - * a = Thread.new { print "a"; Thread.pass; - * print "b"; Thread.pass; - * print "c" } - * b = Thread.new { print "x"; Thread.pass; - * print "y"; Thread.pass; - * print "z" } - * a.join - * b.join - * - * <em>produces:</em> - * - * axbycz - */ - -static VALUE -rb_thread_pass() -{ - rb_thread_schedule(); - return Qnil; -} - - -/* - * call-seq: - * Thread.stop => nil - * - * Stops execution of the current thread, putting it into a ``sleep'' state, - * and schedules execution of another thread. Resets the ``critical'' condition - * to <code>false</code>. - * - * a = Thread.new { print "a"; Thread.stop; print "c" } - * Thread.pass - * print "b" - * a.run - * a.join - * - * <em>produces:</em> - * - * abc - */ - -VALUE -rb_thread_stop() -{ - enum rb_thread_status last_status = THREAD_RUNNABLE; - - rb_thread_critical = 0; - if (curr_thread == curr_thread->next) { - rb_raise(rb_eThreadError, "stopping only thread\n\tnote: use sleep to stop forever"); - } - if (curr_thread->status == THREAD_TO_KILL) - last_status = THREAD_TO_KILL; - curr_thread->status = THREAD_STOPPED; - rb_thread_schedule(); - curr_thread->status = last_status; - - return Qnil; -} - -struct timeval rb_time_timeval(); - -void -rb_thread_polling() -{ - if (curr_thread != curr_thread->next) { - curr_thread->status = THREAD_STOPPED; - curr_thread->delay = timeofday() + (double)0.06; - curr_thread->wait_for = WAIT_TIME; - rb_thread_schedule(); - } -} - -void -rb_thread_sleep(sec) - int sec; -{ - if (curr_thread == curr_thread->next) { - TRAP_BEG; - sleep(sec); - TRAP_END; - return; - } - rb_thread_wait_for(rb_time_timeval(INT2FIX(sec))); -} - -void -rb_thread_sleep_forever() -{ - int thr_critical = rb_thread_critical; - if (curr_thread == curr_thread->next || - curr_thread->status == THREAD_TO_KILL) { - rb_thread_critical = Qtrue; - TRAP_BEG; - pause(); - rb_thread_critical = thr_critical; - TRAP_END; - return; - } - - curr_thread->delay = DELAY_INFTY; - curr_thread->wait_for = WAIT_TIME; - curr_thread->status = THREAD_STOPPED; - rb_thread_schedule(); -} - - -/* - * call-seq: - * thr.priority => integer - * - * Returns the priority of <i>thr</i>. Default is inherited from the - * current thread which creating the new thread, or zero for the - * initial main thread; higher-priority threads will run before - * lower-priority threads. - * - * Thread.current.priority #=> 0 - */ - -static VALUE -rb_thread_priority(thread) - VALUE thread; -{ - return INT2NUM(rb_thread_check(thread)->priority); -} - - -/* - * call-seq: - * thr.priority= integer => thr - * - * Sets the priority of <i>thr</i> to <i>integer</i>. Higher-priority threads - * will run before lower-priority threads. - * - * count1 = count2 = 0 - * a = Thread.new do - * loop { count1 += 1 } - * end - * a.priority = -1 - * - * b = Thread.new do - * loop { count2 += 1 } - * end - * b.priority = -2 - * sleep 1 #=> 1 - * Thread.critical = 1 - * count1 #=> 622504 - * count2 #=> 5832 - */ - -static VALUE -rb_thread_priority_set(thread, prio) - VALUE thread, prio; -{ - rb_thread_t th; - - rb_secure(4); - th = rb_thread_check(thread); - - th->priority = NUM2INT(prio); - rb_thread_schedule(); - return prio; -} - - -/* - * call-seq: - * thr.safe_level => integer - * - * Returns the safe level in effect for <i>thr</i>. Setting thread-local safe - * levels can help when implementing sandboxes which run insecure code. - * - * thr = Thread.new { $SAFE = 3; sleep } - * Thread.current.safe_level #=> 0 - * thr.safe_level #=> 3 - */ - -static VALUE -rb_thread_safe_level(thread) - VALUE thread; -{ - rb_thread_t th; - - th = rb_thread_check(thread); - if (th == curr_thread) { - return INT2NUM(ruby_safe_level); - } - return INT2NUM(th->safe); -} - -static int ruby_thread_abort; -static VALUE thgroup_default; - - -/* - * call-seq: - * Thread.abort_on_exception => true or false - * - * Returns the status of the global ``abort on exception'' condition. The - * default is <code>false</code>. When set to <code>true</code>, or if the - * global <code>$DEBUG</code> flag is <code>true</code> (perhaps because the - * command line option <code>-d</code> was specified) all threads will abort - * (the process will <code>exit(0)</code>) if an exception is raised in any - * thread. See also <code>Thread::abort_on_exception=</code>. - */ - -static VALUE -rb_thread_s_abort_exc() -{ - return ruby_thread_abort?Qtrue:Qfalse; -} - - -/* - * call-seq: - * Thread.abort_on_exception= boolean => true or false - * - * When set to <code>true</code>, all threads will abort if an exception is - * raised. Returns the new state. - * - * Thread.abort_on_exception = true - * t1 = Thread.new do - * puts "In new thread" - * raise "Exception from thread" - * end - * sleep(1) - * puts "not reached" - * - * <em>produces:</em> - * - * In new thread - * prog.rb:4: Exception from thread (RuntimeError) - * from prog.rb:2:in `initialize' - * from prog.rb:2:in `new' - * from prog.rb:2 - */ - -static VALUE -rb_thread_s_abort_exc_set(self, val) - VALUE self, val; -{ - rb_secure(4); - ruby_thread_abort = RTEST(val); - return val; -} - - -/* - * call-seq: - * thr.abort_on_exception => true or false - * - * Returns the status of the thread-local ``abort on exception'' condition for - * <i>thr</i>. The default is <code>false</code>. See also - * <code>Thread::abort_on_exception=</code>. - */ - -static VALUE -rb_thread_abort_exc(thread) - VALUE thread; -{ - return rb_thread_check(thread)->abort?Qtrue:Qfalse; -} - - -/* - * call-seq: - * thr.abort_on_exception= boolean => true or false - * - * When set to <code>true</code>, causes all threads (including the main - * program) to abort if an exception is raised in <i>thr</i>. The process will - * effectively <code>exit(0)</code>. - */ - -static VALUE -rb_thread_abort_exc_set(thread, val) - VALUE thread, val; -{ - rb_secure(4); - rb_thread_check(thread)->abort = RTEST(val); - return val; -} - - -enum rb_thread_status -rb_thread_status(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - return th->status; -} - - -/* - * call-seq: - * thr.group => thgrp or nil - * - * Returns the <code>ThreadGroup</code> which contains <i>thr</i>, or nil if - * the thread is not a member of any group. - * - * Thread.main.group #=> #<ThreadGroup:0x4029d914> - */ - -VALUE -rb_thread_group(thread) - VALUE thread; -{ - VALUE group = rb_thread_check(thread)->thgroup; - if (!group) { - group = Qnil; - } - return group; -} - -#ifdef __ia64 -# define IA64_INIT(x) x -#else -# define IA64_INIT(x) -#endif - -#define THREAD_ALLOC(th) do {\ - th = ALLOC(struct rb_thread);\ -\ - th->next = 0;\ - th->prev = 0;\ -\ - th->status = THREAD_RUNNABLE;\ - th->result = 0;\ - th->flags = 0;\ -\ - th->stk_ptr = 0;\ - th->stk_len = 0;\ - th->stk_max = 0;\ - th->wait_for = 0;\ - IA64_INIT(th->bstr_ptr = 0);\ - IA64_INIT(th->bstr_len = 0);\ - IA64_INIT(th->bstr_max = 0);\ - FD_ZERO(&th->readfds);\ - FD_ZERO(&th->writefds);\ - FD_ZERO(&th->exceptfds);\ - th->delay = 0.0;\ - th->join = 0;\ -\ - th->frame = 0;\ - th->scope = 0;\ - th->klass = 0;\ - th->wrapper = 0;\ - th->cref = ruby_cref;\ - th->dyna_vars = ruby_dyna_vars;\ - th->block = 0;\ - th->iter = 0;\ - th->tag = 0;\ - th->tracing = 0;\ - th->errinfo = Qnil;\ - th->last_status = 0;\ - th->last_line = 0;\ - th->last_match = Qnil;\ - th->abort = 0;\ - th->priority = 0;\ - th->thgroup = thgroup_default;\ - th->locals = 0;\ - th->thread = 0;\ - if (curr_thread == 0) {\ - th->sandbox = Qnil;\ - } else {\ - th->sandbox = curr_thread->sandbox;\ - }\ -} while (0) - -static rb_thread_t -rb_thread_alloc(klass) - VALUE klass; -{ - rb_thread_t th; - struct RVarmap *vars; - - THREAD_ALLOC(th); - th->thread = Data_Wrap_Struct(klass, thread_mark, thread_free, th); - - for (vars = th->dyna_vars; vars; vars = vars->next) { - if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break; - FL_SET(vars, DVAR_DONT_RECYCLE); - } - return th; -} - -static int thread_init; - -#if defined(_THREAD_SAFE) -static void -catch_timer(sig) - int sig; -{ -#if !defined(POSIX_SIGNAL) && !defined(BSD_SIGNAL) - signal(sig, catch_timer); -#endif - /* cause EINTR */ -} - -static int time_thread_alive_p = 0; -static pthread_t time_thread; - -static void* -thread_timer(dummy) - void *dummy; -{ -#ifdef _THREAD_SAFE -#define test_cancel() pthread_testcancel() -#else -#define test_cancel() /* void */ -#endif - - sigset_t all_signals; - - sigfillset(&all_signals); - pthread_sigmask(SIG_BLOCK, &all_signals, 0); - - for (;;) { -#ifdef HAVE_NANOSLEEP - struct timespec req, rem; - - test_cancel(); - req.tv_sec = 0; - req.tv_nsec = 10000000; - nanosleep(&req, &rem); -#else - struct timeval tv; - - test_cancel(); - tv.tv_sec = 0; - tv.tv_usec = 10000; - select(0, NULL, NULL, NULL, &tv); -#endif - if (!rb_thread_critical) { - rb_thread_pending = 1; - if (rb_trap_immediate) { - pthread_kill(ruby_thid, SIGVTALRM); - } - } - } -#undef test_cancel -} - -void -rb_thread_start_timer() -{ -} - -void -rb_thread_stop_timer() -{ -} - -void -rb_child_atfork() -{ - time_thread_alive_p = 0; -} - -void -rb_thread_cancel_timer() -{ -#ifdef _THREAD_SAFE - if( time_thread_alive_p ) - { - pthread_cancel( time_thread ); - pthread_join( time_thread, NULL ); - time_thread_alive_p = 0; - } - thread_init = 0; -#endif -} -#elif defined(HAVE_SETITIMER) -static void -catch_timer(sig) - int sig; -{ -#if !defined(POSIX_SIGNAL) && !defined(BSD_SIGNAL) - signal(sig, catch_timer); -#endif - if (!rb_thread_critical) { - rb_thread_pending = 1; - } - /* cause EINTR */ -} - -void -rb_thread_start_timer() -{ - struct itimerval tval; - - if (!thread_init) return; - tval.it_interval.tv_sec = 0; - tval.it_interval.tv_usec = 10000; - tval.it_value = tval.it_interval; - setitimer(ITIMER_VIRTUAL, &tval, NULL); -} - -void -rb_thread_stop_timer() -{ - struct itimerval tval; - - if (!thread_init) return; - tval.it_interval.tv_sec = 0; - tval.it_interval.tv_usec = 0; - tval.it_value = tval.it_interval; - setitimer(ITIMER_VIRTUAL, &tval, NULL); -} - -void -rb_thread_cancel_timer() -{ -} - -#else /* !(_THREAD_SAFE || HAVE_SETITIMER) */ -int rb_thread_tick = THREAD_TICK; - -void -rb_thread_cancel_timer() -{ -} -#endif - -static VALUE -rb_thread_start_0(fn, arg, th) - VALUE (*fn)(); - void *arg; - rb_thread_t th; -{ - volatile rb_thread_t th_save = th; - volatile VALUE thread = th->thread; - struct BLOCK *volatile saved_block = 0; - enum rb_thread_status status; - int state; - - if (OBJ_FROZEN(curr_thread->thgroup)) { - rb_raise(rb_eThreadError, - "can't start a new thread (frozen ThreadGroup)"); - } - - if (!thread_init) { - thread_init = 1; -#if defined(HAVE_SETITIMER) || defined(_THREAD_SAFE) -#if defined(POSIX_SIGNAL) - posix_signal(SIGVTALRM, catch_timer); -#else - signal(SIGVTALRM, catch_timer); -#endif - -#ifdef _THREAD_SAFE - pthread_create(&time_thread, 0, thread_timer, 0); - time_thread_alive_p = 1; - pthread_atfork(0, 0, rb_child_atfork); -#else - rb_thread_start_timer(); -#endif -#endif - } - - if (THREAD_SAVE_CONTEXT(curr_thread)) { - return thread; - } - - if (ruby_block) { /* should nail down higher blocks */ - struct BLOCK dummy; - - dummy.prev = ruby_block; - blk_copy_prev(&dummy); - saved_block = ruby_block = dummy.prev; - } - scope_dup(ruby_scope); - - if (!th->next) { - /* merge in thread list */ - th->prev = curr_thread; - curr_thread->next->prev = th; - th->next = curr_thread->next; - curr_thread->next = th; - th->priority = curr_thread->priority; - th->thgroup = curr_thread->thgroup; - } - - PUSH_TAG(PROT_THREAD); - if ((state = EXEC_TAG()) == 0) { - if (THREAD_SAVE_CONTEXT(th) == 0) { - curr_thread = th; - th->result = (*fn)(arg, th); - } - th = th_save; - } - else if (TAG_DST()) { - th = th_save; - th->result = prot_tag->retval; - } - POP_TAG(); - status = th->status; - - if (th == main_thread) ruby_stop(state); - rb_thread_remove(th); - - if (saved_block) { - blk_free(saved_block); - } - - if (state && status != THREAD_TO_KILL && !NIL_P(ruby_errinfo)) { - th->flags |= RAISED_EXCEPTION; - if (state == TAG_FATAL) { - /* fatal error within this thread, need to stop whole script */ - main_thread->errinfo = ruby_errinfo; - rb_thread_cleanup(); - } - else if (rb_obj_is_kind_of(ruby_errinfo, rb_eSystemExit)) { - if (th->safe >= 4) { - char buf[32]; - - sprintf(buf, "Insecure exit at level %d", th->safe); - th->errinfo = rb_exc_new2(rb_eSecurityError, buf); - } - else { - /* delegate exception to main_thread */ - rb_thread_main_jump(ruby_errinfo, RESTORE_RAISE); - } - } - else if (th->safe < 4 && (ruby_thread_abort || th->abort || RTEST(ruby_debug))) { - /* exit on main_thread */ - error_print(); - rb_thread_main_jump(ruby_errinfo, RESTORE_EXIT); - } - else { - th->errinfo = ruby_errinfo; - } - } - rb_thread_schedule(); - ruby_stop(0); /* last thread termination */ - return 0; /* not reached */ -} - -VALUE -rb_thread_create(fn, arg) - VALUE (*fn)(); - void *arg; -{ - Init_stack((void *)&arg); - return rb_thread_start_0(fn, arg, rb_thread_alloc(rb_cThread)); -} - -static VALUE -rb_thread_yield(arg, th) - VALUE arg; - rb_thread_t th; -{ - const ID *tbl; - - scope_dup(ruby_block->scope); - - tbl = ruby_scope->local_tbl; - if (tbl) { - int n = *tbl++; - for (tbl += 2, n -= 2; n > 0; --n) { /* skip first 2 ($_ and $~) */ - ID id = *tbl++; - if (id != 0 && !rb_is_local_id(id)) /* push flip states */ - rb_dvar_push(id, Qfalse); - } - } - rb_dvar_push('_', Qnil); - rb_dvar_push('~', Qnil); - ruby_block->dyna_vars = ruby_dyna_vars; - - return rb_yield_0(arg, 0, 0, YIELD_LAMBDA_CALL, Qtrue); -} - -/* - * call-seq: - * Thread.new([arg]*) {|args| block } => thread - * - * Creates and runs a new thread to execute the instructions given in - * <i>block</i>. Any arguments passed to <code>Thread::new</code> are passed - * into the block. - * - * x = Thread.new { sleep 0.1; print "x"; print "y"; print "z" } - * a = Thread.new { print "a"; print "b"; sleep 0.2; print "c" } - * x.join # Let the threads finish before - * a.join # main thread exits... - * - * <em>produces:</em> - * - * abxyzc - */ - -static VALUE -rb_thread_s_new(argc, argv, klass) - int argc; - VALUE *argv; - VALUE klass; -{ - rb_thread_t th = rb_thread_alloc(klass); - volatile VALUE *pos; - - pos = th->stk_pos; - rb_obj_call_init(th->thread, argc, argv); - if (th->stk_pos == 0) { - rb_raise(rb_eThreadError, "uninitialized thread - check `%s#initialize'", - rb_class2name(klass)); - } - - return th->thread; -} - - -/* - * call-seq: - * Thread.new([arg]*) {|args| block } => thread - * - * Creates and runs a new thread to execute the instructions given in - * <i>block</i>. Any arguments passed to <code>Thread::new</code> are passed - * into the block. - * - * x = Thread.new { sleep 0.1; print "x"; print "y"; print "z" } - * a = Thread.new { print "a"; print "b"; sleep 0.2; print "c" } - * x.join # Let the threads finish before - * a.join # main thread exits... - * - * <em>produces:</em> - * - * abxyzc - */ - -static VALUE -rb_thread_initialize(thread, args) - VALUE thread, args; -{ - rb_thread_t th; - - if (!rb_block_given_p()) { - rb_raise(rb_eThreadError, "must be called with a block"); - } - th = rb_thread_check(thread); - if (th->stk_max) { - NODE *node = th->node; - if (!node) { - rb_raise(rb_eThreadError, "already initialized thread"); - } - rb_raise(rb_eThreadError, "already initialized thread - %s:%d", - node->nd_file, nd_line(node)); - } - return rb_thread_start_0(rb_thread_yield, args, th); -} - - -/* - * call-seq: - * Thread.start([args]*) {|args| block } => thread - * Thread.fork([args]*) {|args| block } => thread - * - * Basically the same as <code>Thread::new</code>. However, if class - * <code>Thread</code> is subclassed, then calling <code>start</code> in that - * subclass will not invoke the subclass's <code>initialize</code> method. - */ - -static VALUE -rb_thread_start(klass, args) - VALUE klass, args; -{ - if (!rb_block_given_p()) { - rb_raise(rb_eThreadError, "must be called with a block"); - } - return rb_thread_start_0(rb_thread_yield, args, rb_thread_alloc(klass)); -} - - -/* - * call-seq: - * thr.value => obj - * - * Waits for <i>thr</i> to complete (via <code>Thread#join</code>) and returns - * its value. - * - * a = Thread.new { 2 + 2 } - * a.value #=> 4 - */ - -static VALUE -rb_thread_value(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - - while (!rb_thread_join(th, DELAY_INFTY)); - - return th->result; -} - - -/* - * call-seq: - * thr.status => string, false or nil - * - * Returns the status of <i>thr</i>: ``<code>sleep</code>'' if <i>thr</i> is - * sleeping or waiting on I/O, ``<code>run</code>'' if <i>thr</i> is executing, - * ``<code>aborting</code>'' if <i>thr</i> is aborting, <code>false</code> if - * <i>thr</i> terminated normally, and <code>nil</code> if <i>thr</i> - * terminated with an exception. - * - * a = Thread.new { raise("die now") } - * b = Thread.new { Thread.stop } - * c = Thread.new { Thread.exit } - * d = Thread.new { sleep } - * Thread.critical = true - * d.kill #=> #<Thread:0x401b3678 aborting> - * a.status #=> nil - * b.status #=> "sleep" - * c.status #=> false - * d.status #=> "aborting" - * Thread.current.status #=> "run" - */ - -static VALUE -rb_thread_status_name(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - - if (rb_thread_dead(th)) { - if (!NIL_P(th->errinfo) && (th->flags & RAISED_EXCEPTION)) - return Qnil; - return Qfalse; - } - - return rb_str_new2(thread_status_name(th->status)); -} - - -/* - * call-seq: - * thr.alive? => true or false - * - * Returns <code>true</code> if <i>thr</i> is running or sleeping. - * - * thr = Thread.new { } - * thr.join #=> #<Thread:0x401b3fb0 dead> - * Thread.current.alive? #=> true - * thr.alive? #=> false - */ - -VALUE -rb_thread_alive_p(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - - if (rb_thread_dead(th)) return Qfalse; - return Qtrue; -} - - -/* - * call-seq: - * thr.stop? => true or false - * - * Returns <code>true</code> if <i>thr</i> is dead or sleeping. - * - * a = Thread.new { Thread.stop } - * b = Thread.current - * a.stop? #=> true - * b.stop? #=> false - */ - -static VALUE -rb_thread_stop_p(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - - if (rb_thread_dead(th)) return Qtrue; - if (th->status == THREAD_STOPPED) return Qtrue; - return Qfalse; -} - -static void -rb_thread_wait_other_threads() -{ - rb_thread_t th; - int found; - - /* wait other threads to terminate */ - while (curr_thread != curr_thread->next) { - found = 0; - FOREACH_THREAD(th) { - if (th != curr_thread && th->status != THREAD_STOPPED) { - found = 1; - break; - } - } - END_FOREACH(th); - if (!found) return; - rb_thread_schedule(); - } -} - -static void -rb_thread_cleanup() -{ - rb_thread_t curr, th; - - curr = curr_thread; - while (curr->status == THREAD_KILLED) { - curr = curr->prev; - } - - FOREACH_THREAD_FROM(curr, th) { - if (th->status != THREAD_KILLED) { - rb_thread_ready(th); - if (th != main_thread) { - th->thgroup = 0; - th->priority = 0; - th->status = THREAD_TO_KILL; - RDATA(th->thread)->dfree = NULL; - } - } - } - END_FOREACH_FROM(curr, th); -} - -int rb_thread_critical; - - -/* - * call-seq: - * Thread.critical => true or false - * - * Returns the status of the global ``thread critical'' condition. - */ - -static VALUE -rb_thread_critical_get() -{ - return rb_thread_critical?Qtrue:Qfalse; -} - - -/* - * call-seq: - * Thread.critical= boolean => true or false - * - * Sets the status of the global ``thread critical'' condition and returns - * it. When set to <code>true</code>, prohibits scheduling of any existing - * thread. Does not block new threads from being created and run. Certain - * thread operations (such as stopping or killing a thread, sleeping in the - * current thread, and raising an exception) may cause a thread to be scheduled - * even when in a critical section. <code>Thread::critical</code> is not - * intended for daily use: it is primarily there to support folks writing - * threading libraries. - */ - -static VALUE -rb_thread_critical_set(obj, val) - VALUE obj, val; -{ - rb_thread_critical = RTEST(val); - return val; -} - -void -rb_thread_interrupt() -{ - rb_thread_critical = 0; - rb_thread_ready(main_thread); - if (curr_thread == main_thread) { - rb_interrupt(); - } - if (!rb_thread_dead(curr_thread)) { - if (THREAD_SAVE_CONTEXT(curr_thread)) { - return; - } - } - curr_thread = main_thread; - rb_thread_restore_context(curr_thread, RESTORE_INTERRUPT); -} - -void -rb_thread_signal_raise(sig) - int sig; -{ - rb_thread_critical = 0; - if (curr_thread == main_thread) { - VALUE argv[1]; - - rb_thread_ready(curr_thread); - argv[0] = INT2FIX(sig); - rb_exc_raise(rb_class_new_instance(1, argv, rb_eSignal)); - } - rb_thread_ready(main_thread); - if (!rb_thread_dead(curr_thread)) { - if (THREAD_SAVE_CONTEXT(curr_thread)) { - return; - } - } - th_sig = sig; - curr_thread = main_thread; - rb_thread_restore_context(curr_thread, RESTORE_SIGNAL); -} - -void -rb_thread_trap_eval(cmd, sig, safe) - VALUE cmd; - int sig, safe; -{ - rb_thread_critical = 0; - if (curr_thread == main_thread) { - rb_trap_eval(cmd, sig, safe); - return; - } - if (!rb_thread_dead(curr_thread)) { - if (THREAD_SAVE_CONTEXT(curr_thread)) { - return; - } - } - th_cmd = cmd; - th_sig = sig; - th_safe = safe; - curr_thread = main_thread; - rb_thread_restore_context(curr_thread, RESTORE_TRAP); -} - -void -rb_thread_signal_exit() -{ - VALUE args[2]; - - rb_thread_critical = 0; - if (curr_thread == main_thread) { - rb_thread_ready(curr_thread); - rb_exit(EXIT_SUCCESS); - } - args[0] = INT2NUM(EXIT_SUCCESS); - args[1] = rb_str_new2("exit"); - rb_thread_ready(main_thread); - if (!rb_thread_dead(curr_thread)) { - if (THREAD_SAVE_CONTEXT(curr_thread)) { - return; - } - } - rb_thread_main_jump(rb_class_new_instance(2, args, rb_eSystemExit), - RESTORE_EXIT); -} - -static VALUE -rb_thread_raise(argc, argv, th) - int argc; - VALUE *argv; - rb_thread_t th; -{ - volatile rb_thread_t th_save = th; - VALUE exc; - - if (!th->next) { - rb_raise(rb_eArgError, "unstarted thread"); - } - if (rb_thread_dead(th)) return Qnil; - exc = rb_make_exception(argc, argv); - if (curr_thread == th) { - rb_raise_jump(exc); - } - - if (!rb_thread_dead(curr_thread)) { - if (THREAD_SAVE_CONTEXT(curr_thread)) { - return th_save->thread; - } - } - - rb_thread_ready(th); - curr_thread = th; - - th_raise_exception = exc; - th_raise_node = ruby_current_node; - rb_thread_restore_context(curr_thread, RESTORE_RAISE); - return Qnil; /* not reached */ -} - - -/* - * call-seq: - * thr.raise(exception) - * - * Raises an exception (see <code>Kernel::raise</code>) from <i>thr</i>. The - * caller does not have to be <i>thr</i>. - * - * Thread.abort_on_exception = true - * a = Thread.new { sleep(200) } - * a.raise("Gotcha") - * - * <em>produces:</em> - * - * prog.rb:3: Gotcha (RuntimeError) - * from prog.rb:2:in `initialize' - * from prog.rb:2:in `new' - * from prog.rb:2 - */ - -static VALUE -rb_thread_raise_m(argc, argv, thread) - int argc; - VALUE *argv; - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - - if (ruby_safe_level > th->safe) { - rb_secure(4); - } - rb_thread_raise(argc, argv, th); - return Qnil; /* not reached */ -} - -VALUE -rb_thread_local_aref(thread, id) - VALUE thread; - ID id; -{ - rb_thread_t th; - VALUE val; - - th = rb_thread_check(thread); - if (ruby_safe_level >= 4 && th != curr_thread) { - rb_raise(rb_eSecurityError, "Insecure: thread locals"); - } - if (!th->locals) return Qnil; - if (st_lookup(th->locals, id, &val)) { - return val; - } - return Qnil; -} - - -/* - * call-seq: - * thr[sym] => obj or nil - * - * Attribute Reference---Returns the value of a thread-local variable, using - * either a symbol or a string name. If the specified variable does not exist, - * returns <code>nil</code>. - * - * a = Thread.new { Thread.current["name"] = "A"; Thread.stop } - * b = Thread.new { Thread.current[:name] = "B"; Thread.stop } - * c = Thread.new { Thread.current["name"] = "C"; Thread.stop } - * Thread.list.each {|x| puts "#{x.inspect}: #{x[:name]}" } - * - * <em>produces:</em> - * - * #<Thread:0x401b3b3c sleep>: C - * #<Thread:0x401b3bc8 sleep>: B - * #<Thread:0x401b3c68 sleep>: A - * #<Thread:0x401bdf4c run>: - */ - -static VALUE -rb_thread_aref(thread, id) - VALUE thread, id; -{ - return rb_thread_local_aref(thread, rb_to_id(id)); -} - -VALUE -rb_thread_local_aset(thread, id, val) - VALUE thread; - ID id; - VALUE val; -{ - rb_thread_t th = rb_thread_check(thread); - - if (ruby_safe_level >= 4 && th != curr_thread) { - rb_raise(rb_eSecurityError, "Insecure: can't modify thread locals"); - } - if (OBJ_FROZEN(thread)) rb_error_frozen("thread locals"); - - if (!th->locals) { - th->locals = st_init_numtable(); - } - if (NIL_P(val)) { - st_delete(th->locals, (st_data_t*)&id, 0); - return Qnil; - } - st_insert(th->locals, id, val); - - return val; -} - - -/* - * call-seq: - * thr[sym] = obj => obj - * - * Attribute Assignment---Sets or creates the value of a thread-local variable, - * using either a symbol or a string. See also <code>Thread#[]</code>. - */ - -static VALUE -rb_thread_aset(thread, id, val) - VALUE thread, id, val; -{ - return rb_thread_local_aset(thread, rb_to_id(id), val); -} - - -/* - * call-seq: - * thr.key?(sym) => true or false - * - * Returns <code>true</code> if the given string (or symbol) exists as a - * thread-local variable. - * - * me = Thread.current - * me[:oliver] = "a" - * me.key?(:oliver) #=> true - * me.key?(:stanley) #=> false - */ - -static VALUE -rb_thread_key_p(thread, id) - VALUE thread, id; -{ - rb_thread_t th = rb_thread_check(thread); - - if (!th->locals) return Qfalse; - if (st_lookup(th->locals, rb_to_id(id), 0)) - return Qtrue; - return Qfalse; -} - -static int -thread_keys_i(key, value, ary) - ID key; - VALUE value, ary; -{ - rb_ary_push(ary, ID2SYM(key)); - return ST_CONTINUE; -} - - -/* - * call-seq: - * thr.keys => array - * - * Returns an an array of the names of the thread-local variables (as Symbols). - * - * thr = Thread.new do - * Thread.current[:cat] = 'meow' - * Thread.current["dog"] = 'woof' - * end - * thr.join #=> #<Thread:0x401b3f10 dead> - * thr.keys #=> [:dog, :cat] - */ - -static VALUE -rb_thread_keys(thread) - VALUE thread; -{ - rb_thread_t th = rb_thread_check(thread); - VALUE ary = rb_ary_new(); - - if (th->locals) { - st_foreach(th->locals, thread_keys_i, ary); - } - return ary; -} - -/* - * call-seq: - * thr.inspect => string - * - * Dump the name, id, and status of _thr_ to a string. - */ - -static VALUE -rb_thread_inspect(thread) - VALUE thread; -{ - char *cname = rb_obj_classname(thread); - rb_thread_t th = rb_thread_check(thread); - const char *status = thread_status_name(th->status); - VALUE str; - size_t len = strlen(cname)+7+16+9+1; - - str = rb_str_new(0, len); /* 7:tags 16:addr 9:status 1:nul */ - snprintf(RSTRING(str)->ptr, len, "#<%s:0x%lx %s>", cname, thread, status); - RSTRING(str)->len = strlen(RSTRING(str)->ptr); - OBJ_INFECT(str, thread); - - return str; -} - -void -rb_thread_atfork() -{ - rb_thread_t th; - - if (rb_thread_alone()) return; - FOREACH_THREAD(th) { - if (th != curr_thread) { - rb_thread_die(th); - } - } - END_FOREACH(th); - main_thread = curr_thread; - curr_thread->next = curr_thread; - curr_thread->prev = curr_thread; -} - - -/* - * Document-class: Continuation - * - * Continuation objects are generated by - * <code>Kernel#callcc</code>. They hold a return address and execution - * context, allowing a nonlocal return to the end of the - * <code>callcc</code> block from anywhere within a program. - * Continuations are somewhat analogous to a structured version of C's - * <code>setjmp/longjmp</code> (although they contain more state, so - * you might consider them closer to threads). - * - * For instance: - * - * arr = [ "Freddie", "Herbie", "Ron", "Max", "Ringo" ] - * callcc{|$cc|} - * puts(message = arr.shift) - * $cc.call unless message =~ /Max/ - * - * <em>produces:</em> - * - * Freddie - * Herbie - * Ron - * Max - * - * This (somewhat contrived) example allows the inner loop to abandon - * processing early: - * - * callcc {|cont| - * for i in 0..4 - * print "\n#{i}: " - * for j in i*5...(i+1)*5 - * cont.call() if j == 17 - * printf "%3d", j - * end - * end - * } - * print "\n" - * - * <em>produces:</em> - * - * 0: 0 1 2 3 4 - * 1: 5 6 7 8 9 - * 2: 10 11 12 13 14 - * 3: 15 16 - */ - -VALUE rb_cCont; - -/* - * call-seq: - * callcc {|cont| block } => obj - * - * Generates a <code>Continuation</code> object, which it passes to the - * associated block. Performing a <em>cont</em><code>.call</code> will - * cause the <code>callcc</code> to return (as will falling through the - * end of the block). The value returned by the <code>callcc</code> is - * the value of the block, or the value passed to - * <em>cont</em><code>.call</code>. See class <code>Continuation</code> - * for more details. Also see <code>Kernel::throw</code> for - * an alternative mechanism for unwinding a call stack. - */ - -static VALUE -rb_callcc(self) - VALUE self; -{ - volatile VALUE cont; - rb_thread_t th; - volatile rb_thread_t th_save; - struct tag *tag; - struct RVarmap *vars; - - THREAD_ALLOC(th); - cont = Data_Wrap_Struct(rb_cCont, thread_mark, thread_free, th); - - scope_dup(ruby_scope); - for (tag=prot_tag; tag; tag=tag->prev) { - scope_dup(tag->scope); - } - th->thread = curr_thread->thread; - th->thgroup = cont_protect; - - for (vars = ruby_dyna_vars; vars; vars = vars->next) { - if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break; - FL_SET(vars, DVAR_DONT_RECYCLE); - } - th_save = th; - if (THREAD_SAVE_CONTEXT(th)) { - return th_save->result; - } - else { - return rb_yield(cont); - } -} - -/* - * call-seq: - * cont.call(args, ...) - * cont[args, ...] - * - * Invokes the continuation. The program continues from the end of the - * <code>callcc</code> block. If no arguments are given, the original - * <code>callcc</code> returns <code>nil</code>. If one argument is - * given, <code>callcc</code> returns it. Otherwise, an array - * containing <i>args</i> is returned. - * - * callcc {|cont| cont.call } #=> nil - * callcc {|cont| cont.call 1 } #=> 1 - * callcc {|cont| cont.call 1, 2, 3 } #=> [1, 2, 3] - */ - -static VALUE -rb_cont_call(argc, argv, cont) - int argc; - VALUE *argv; - VALUE cont; -{ - rb_thread_t th = rb_thread_check(cont); - - if (th->thread != curr_thread->thread) { - rb_raise(rb_eRuntimeError, "continuation called across threads"); - } - if (th->thgroup != cont_protect) { - rb_raise(rb_eRuntimeError, "continuation called across trap"); - } - switch (argc) { - case 0: - th->result = Qnil; - break; - case 1: - th->result = argv[0]; - break; - default: - th->result = rb_ary_new4(argc, argv); - break; - } - - rb_thread_restore_context(th, RESTORE_NORMAL); - return Qnil; -} - -struct thgroup { - int enclosed; - VALUE group; -}; - - -/* - * Document-class: ThreadGroup - * - * <code>ThreadGroup</code> provides a means of keeping track of a number of - * threads as a group. A <code>Thread</code> can belong to only one - * <code>ThreadGroup</code> at a time; adding a thread to a new group will - * remove it from any previous group. - * - * Newly created threads belong to the same group as the thread from which they - * were created. - */ - -static VALUE thgroup_s_alloc _((VALUE)); -static VALUE -thgroup_s_alloc(klass) - VALUE klass; -{ - VALUE group; - struct thgroup *data; - - group = Data_Make_Struct(klass, struct thgroup, 0, free, data); - data->enclosed = 0; - data->group = group; - - return group; -} - - -/* - * call-seq: - * thgrp.list => array - * - * Returns an array of all existing <code>Thread</code> objects that belong to - * this group. - * - * ThreadGroup::Default.list #=> [#<Thread:0x401bdf4c run>] - */ - -static VALUE -thgroup_list(group) - VALUE group; -{ - struct thgroup *data; - rb_thread_t th; - VALUE ary; - - Data_Get_Struct(group, struct thgroup, data); - ary = rb_ary_new(); - - FOREACH_THREAD(th) { - if (th->thgroup == data->group) { - rb_ary_push(ary, th->thread); - } - } - END_FOREACH(th); - - return ary; -} - - -/* - * call-seq: - * thgrp.enclose => thgrp - * - * Prevents threads from being added to or removed from the receiving - * <code>ThreadGroup</code>. New threads can still be started in an enclosed - * <code>ThreadGroup</code>. - * - * ThreadGroup::Default.enclose #=> #<ThreadGroup:0x4029d914> - * thr = Thread::new { Thread.stop } #=> #<Thread:0x402a7210 sleep> - * tg = ThreadGroup::new #=> #<ThreadGroup:0x402752d4> - * tg.add thr - * - * <em>produces:</em> - * - * ThreadError: can't move from the enclosed thread group - */ - -static VALUE -thgroup_enclose(group) - VALUE group; -{ - struct thgroup *data; - - Data_Get_Struct(group, struct thgroup, data); - data->enclosed = 1; - - return group; -} - - -/* - * call-seq: - * thgrp.enclosed? => true or false - * - * Returns <code>true</code> if <em>thgrp</em> is enclosed. See also - * ThreadGroup#enclose. - */ - -static VALUE -thgroup_enclosed_p(group) - VALUE group; -{ - struct thgroup *data; - - Data_Get_Struct(group, struct thgroup, data); - if (data->enclosed) return Qtrue; - return Qfalse; -} - - -/* - * call-seq: - * thgrp.add(thread) => thgrp - * - * Adds the given <em>thread</em> to this group, removing it from any other - * group to which it may have previously belonged. - * - * puts "Initial group is #{ThreadGroup::Default.list}" - * tg = ThreadGroup.new - * t1 = Thread.new { sleep } - * t2 = Thread.new { sleep } - * puts "t1 is #{t1}" - * puts "t2 is #{t2}" - * tg.add(t1) - * puts "Initial group now #{ThreadGroup::Default.list}" - * puts "tg group now #{tg.list}" - * - * <em>produces:</em> - * - * Initial group is #<Thread:0x401bdf4c> - * t1 is #<Thread:0x401b3c90> - * t2 is #<Thread:0x401b3c18> - * Initial group now #<Thread:0x401b3c18>#<Thread:0x401bdf4c> - * tg group now #<Thread:0x401b3c90> - */ - -static VALUE -thgroup_add(group, thread) - VALUE group, thread; -{ - rb_thread_t th; - struct thgroup *data; - - rb_secure(4); - th = rb_thread_check(thread); - if (!th->next || !th->prev) { - rb_raise(rb_eTypeError, "wrong argument type %s (expected Thread)", - rb_obj_classname(thread)); - } - - if (OBJ_FROZEN(group)) { - rb_raise(rb_eThreadError, "can't move to the frozen thread group"); - } - Data_Get_Struct(group, struct thgroup, data); - if (data->enclosed) { - rb_raise(rb_eThreadError, "can't move to the enclosed thread group"); - } - - if (!th->thgroup) { - return Qnil; - } - if (OBJ_FROZEN(th->thgroup)) { - rb_raise(rb_eThreadError, "can't move from the frozen thread group"); - } - Data_Get_Struct(th->thgroup, struct thgroup, data); - if (data->enclosed) { - rb_raise(rb_eThreadError, "can't move from the enclosed thread group"); - } - - th->thgroup = group; - return group; -} - - -/* - * +Thread+ encapsulates the behavior of a thread of - * execution, including the main thread of the Ruby script. - * - * In the descriptions of the methods in this class, the parameter _sym_ - * refers to a symbol, which is either a quoted string or a - * +Symbol+ (such as <code>:name</code>). - */ - -void -Init_Thread() -{ - VALUE cThGroup; - - rb_eThreadError = rb_define_class("ThreadError", rb_eStandardError); - rb_cThread = rb_define_class("Thread", rb_cObject); - rb_undef_alloc_func(rb_cThread); - - rb_define_singleton_method(rb_cThread, "new", rb_thread_s_new, -1); - rb_define_method(rb_cThread, "initialize", rb_thread_initialize, -2); - rb_define_singleton_method(rb_cThread, "start", rb_thread_start, -2); - rb_define_singleton_method(rb_cThread, "fork", rb_thread_start, -2); - - rb_define_singleton_method(rb_cThread, "stop", rb_thread_stop, 0); - rb_define_singleton_method(rb_cThread, "kill", rb_thread_s_kill, 1); - rb_define_singleton_method(rb_cThread, "exit", rb_thread_exit, 0); - rb_define_singleton_method(rb_cThread, "pass", rb_thread_pass, 0); - rb_define_singleton_method(rb_cThread, "current", rb_thread_current, 0); - rb_define_singleton_method(rb_cThread, "main", rb_thread_main, 0); - rb_define_singleton_method(rb_cThread, "list", rb_thread_list, 0); - - rb_define_singleton_method(rb_cThread, "critical", rb_thread_critical_get, 0); - rb_define_singleton_method(rb_cThread, "critical=", rb_thread_critical_set, 1); - - rb_define_singleton_method(rb_cThread, "abort_on_exception", rb_thread_s_abort_exc, 0); - rb_define_singleton_method(rb_cThread, "abort_on_exception=", rb_thread_s_abort_exc_set, 1); - - rb_define_method(rb_cThread, "run", rb_thread_run, 0); - rb_define_method(rb_cThread, "wakeup", rb_thread_wakeup, 0); - rb_define_method(rb_cThread, "kill", rb_thread_kill, 0); - rb_define_method(rb_cThread, "terminate", rb_thread_kill, 0); - rb_define_method(rb_cThread, "exit", rb_thread_kill, 0); - rb_define_method(rb_cThread, "kill!", rb_thread_kill_bang, 0); - rb_define_method(rb_cThread, "terminate!", rb_thread_kill_bang, 0); - rb_define_method(rb_cThread, "exit!", rb_thread_kill_bang, 0); - rb_define_method(rb_cThread, "value", rb_thread_value, 0); - rb_define_method(rb_cThread, "status", rb_thread_status_name, 0); - rb_define_method(rb_cThread, "join", rb_thread_join_m, -1); - rb_define_method(rb_cThread, "alive?", rb_thread_alive_p, 0); - rb_define_method(rb_cThread, "stop?", rb_thread_stop_p, 0); - rb_define_method(rb_cThread, "raise", rb_thread_raise_m, -1); - - rb_define_method(rb_cThread, "abort_on_exception", rb_thread_abort_exc, 0); - rb_define_method(rb_cThread, "abort_on_exception=", rb_thread_abort_exc_set, 1); - - rb_define_method(rb_cThread, "priority", rb_thread_priority, 0); - rb_define_method(rb_cThread, "priority=", rb_thread_priority_set, 1); - rb_define_method(rb_cThread, "safe_level", rb_thread_safe_level, 0); - rb_define_method(rb_cThread, "group", rb_thread_group, 0); - - rb_define_method(rb_cThread, "[]", rb_thread_aref, 1); - rb_define_method(rb_cThread, "[]=", rb_thread_aset, 2); - rb_define_method(rb_cThread, "key?", rb_thread_key_p, 1); - rb_define_method(rb_cThread, "keys", rb_thread_keys, 0); - - rb_define_method(rb_cThread, "inspect", rb_thread_inspect, 0); - - rb_cCont = rb_define_class("Continuation", rb_cObject); - rb_undef_alloc_func(rb_cCont); - rb_undef_method(CLASS_OF(rb_cCont), "new"); - rb_define_method(rb_cCont, "call", rb_cont_call, -1); - rb_define_method(rb_cCont, "[]", rb_cont_call, -1); - rb_define_global_function("callcc", rb_callcc, 0); - rb_global_variable(&cont_protect); - - cThGroup = rb_define_class("ThreadGroup", rb_cObject); - rb_define_alloc_func(cThGroup, thgroup_s_alloc); - rb_define_method(cThGroup, "list", thgroup_list, 0); - rb_define_method(cThGroup, "enclose", thgroup_enclose, 0); - rb_define_method(cThGroup, "enclosed?", thgroup_enclosed_p, 0); - rb_define_method(cThGroup, "add", thgroup_add, 1); - rb_global_variable(&thgroup_default); - thgroup_default = rb_obj_alloc(cThGroup); - rb_define_const(cThGroup, "Default", thgroup_default); - - /* allocate main thread */ - main_thread = rb_thread_alloc(rb_cThread); - curr_thread = main_thread->prev = main_thread->next = main_thread; -} - -/* - * call-seq: - * catch(symbol) {| | block } > obj - * - * +catch+ executes its block. If a +throw+ is - * executed, Ruby searches up its stack for a +catch+ block - * with a tag corresponding to the +throw+'s - * _symbol_. If found, that block is terminated, and - * +catch+ returns the value given to +throw+. If - * +throw+ is not called, the block terminates normally, and - * the value of +catch+ is the value of the last expression - * evaluated. +catch+ expressions may be nested, and the - * +throw+ call need not be in lexical scope. - * - * def routine(n) - * puts n - * throw :done if n <= 0 - * routine(n-1) - * end - * - * - * catch(:done) { routine(3) } - * - * <em>produces:</em> - * - * 3 - * 2 - * 1 - * 0 - */ - -static VALUE -rb_f_catch(dmy, tag) - VALUE dmy, tag; -{ - int state; - VALUE val = Qnil; /* OK */ - - tag = ID2SYM(rb_to_id(tag)); - PUSH_TAG(tag); - if ((state = EXEC_TAG()) == 0) { - val = rb_yield_0(tag, 0, 0, 0, Qfalse); - } - else if (state == TAG_THROW && tag == prot_tag->dst) { - val = prot_tag->retval; - state = 0; - } - POP_TAG(); - if (state) JUMP_TAG(state); - - return val; -} - -static VALUE -catch_i(tag) - VALUE tag; -{ - return rb_funcall(Qnil, rb_intern("catch"), 1, tag); -} - -VALUE -rb_catch(tag, func, data) - const char *tag; - VALUE (*func)(); - VALUE data; -{ - return rb_iterate((VALUE(*)_((VALUE)))catch_i, ID2SYM(rb_intern(tag)), func, data); -} - -/* - * call-seq: - * throw(symbol [, obj]) - * - * Transfers control to the end of the active +catch+ block - * waiting for _symbol_. Raises +NameError+ if there - * is no +catch+ block for the symbol. The optional second - * parameter supplies a return value for the +catch+ block, - * which otherwise defaults to +nil+. For examples, see - * <code>Kernel::catch</code>. - */ - -static VALUE -rb_f_throw(argc, argv) - int argc; - VALUE *argv; -{ - VALUE tag, value; - struct tag *tt = prot_tag; - - rb_scan_args(argc, argv, "11", &tag, &value); - tag = ID2SYM(rb_to_id(tag)); - - while (tt) { - if (tt->tag == tag) { - tt->dst = tag; - tt->retval = value; - break; - } - if (tt->tag == PROT_THREAD) { - rb_raise(rb_eThreadError, "uncaught throw `%s' in thread 0x%lx", - rb_id2name(SYM2ID(tag)), - curr_thread); - } - tt = tt->prev; - } - if (!tt) { - rb_name_error(SYM2ID(tag), "uncaught throw `%s'", rb_id2name(SYM2ID(tag))); - } - rb_trap_restore_mask(); - JUMP_TAG(TAG_THROW); -#ifndef __GNUC__ - return Qnil; /* not reached */ -#endif -} - -void -rb_throw(tag, val) - const char *tag; - VALUE val; -{ - VALUE argv[2]; - - argv[0] = ID2SYM(rb_intern(tag)); - argv[1] = val; - rb_f_throw(2, argv); -} |