diff options
Diffstat (limited to 'ruby_1_9_3/ext/dl/cfunc.c')
| -rw-r--r-- | ruby_1_9_3/ext/dl/cfunc.c | 674 |
1 files changed, 674 insertions, 0 deletions
diff --git a/ruby_1_9_3/ext/dl/cfunc.c b/ruby_1_9_3/ext/dl/cfunc.c new file mode 100644 index 0000000000..8edf102210 --- /dev/null +++ b/ruby_1_9_3/ext/dl/cfunc.c @@ -0,0 +1,674 @@ +/* -*- C -*- + * $Id$ + */ + +#include <ruby.h> +#include <errno.h> +#include "dl.h" + +VALUE rb_cDLCFunc; + +static ID id_last_error; + +static VALUE +rb_dl_get_last_error(VALUE self) +{ + return rb_thread_local_aref(rb_thread_current(), id_last_error); +} + +static VALUE +rb_dl_set_last_error(VALUE self, VALUE val) +{ + rb_thread_local_aset(rb_thread_current(), id_last_error, val); + return Qnil; +} + +#if defined(_WIN32) +#include <windows.h> +static ID id_win32_last_error; + +static VALUE +rb_dl_get_win32_last_error(VALUE self) +{ + return rb_thread_local_aref(rb_thread_current(), id_win32_last_error); +} + +static VALUE +rb_dl_set_win32_last_error(VALUE self, VALUE val) +{ + rb_thread_local_aset(rb_thread_current(), id_win32_last_error, val); + return Qnil; +} +#endif + +static void +dlcfunc_mark(void *ptr) +{ + struct cfunc_data *data = ptr; + if (data->wrap) { + rb_gc_mark(data->wrap); + } +} + +static void +dlcfunc_free(void *ptr) +{ + struct cfunc_data *data = ptr; + if( data->name ){ + xfree(data->name); + } + xfree(data); +} + +static size_t +dlcfunc_memsize(const void *ptr) +{ + const struct cfunc_data *data = ptr; + size_t size = 0; + if( data ){ + size += sizeof(*data); + if( data->name ){ + size += strlen(data->name) + 1; + } + } + return size; +} + +const rb_data_type_t dlcfunc_data_type = { + "dl/cfunc", + {dlcfunc_mark, dlcfunc_free, dlcfunc_memsize,}, +}; + +VALUE +rb_dlcfunc_new(void (*func)(), int type, const char *name, ID calltype) +{ + VALUE val; + struct cfunc_data *data; + + rb_secure(4); + if( func ){ + val = TypedData_Make_Struct(rb_cDLCFunc, struct cfunc_data, &dlcfunc_data_type, data); + data->ptr = (void *)(VALUE)func; + data->name = name ? strdup(name) : NULL; + data->type = type; + data->calltype = calltype; + } + else{ + val = Qnil; + } + + return val; +} + +void * +rb_dlcfunc2ptr(VALUE val) +{ + struct cfunc_data *data; + void * func; + + if( rb_typeddata_is_kind_of(val, &dlcfunc_data_type) ){ + data = DATA_PTR(val); + func = data->ptr; + } + else if( val == Qnil ){ + func = NULL; + } + else{ + rb_raise(rb_eTypeError, "DL::CFunc was expected"); + } + + return func; +} + +static VALUE +rb_dlcfunc_s_allocate(VALUE klass) +{ + VALUE obj; + struct cfunc_data *data; + + obj = TypedData_Make_Struct(klass, struct cfunc_data, &dlcfunc_data_type, data); + data->ptr = 0; + data->name = 0; + data->type = 0; + data->calltype = CFUNC_CDECL; + + return obj; +} + +int +rb_dlcfunc_kind_p(VALUE func) +{ + return rb_typeddata_is_kind_of(func, &dlcfunc_data_type); +} + +/* + * call-seq: + * DL::CFunc.new(address, type=DL::TYPE_VOID, name=nil, calltype=:cdecl) + * + * Create a new function that points to +address+ with an optional return type + * of +type+, a name of +name+ and a calltype of +calltype+. + */ +static VALUE +rb_dlcfunc_initialize(int argc, VALUE argv[], VALUE self) +{ + VALUE addr, name, type, calltype, addrnum; + struct cfunc_data *data; + void *saddr; + const char *sname; + + rb_scan_args(argc, argv, "13", &addr, &type, &name, &calltype); + + addrnum = rb_Integer(addr); + saddr = (void*)(NUM2PTR(addrnum)); + sname = NIL_P(name) ? NULL : StringValuePtr(name); + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, data); + if( data->name ) xfree(data->name); + data->ptr = saddr; + data->name = sname ? strdup(sname) : 0; + data->type = NIL_P(type) ? DLTYPE_VOID : NUM2INT(type); + data->calltype = NIL_P(calltype) ? CFUNC_CDECL : SYM2ID(calltype); + data->wrap = (addrnum == addr) ? 0 : addr; + + return Qnil; +} + +/* + * call-seq: + * name => str + * + * Get the name of this function + */ +static VALUE +rb_dlcfunc_name(VALUE self) +{ + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + return cfunc->name ? rb_tainted_str_new2(cfunc->name) : Qnil; +} + +/* + * call-seq: + * cfunc.ctype => num + * + * Get the C function return value type. See DL for a list of constants + * corresponding to this method's return value. + */ +static VALUE +rb_dlcfunc_ctype(VALUE self) +{ + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + return INT2NUM(cfunc->type); +} + +/* + * call-seq: + * cfunc.ctype = type + * + * Set the C function return value type to +type+. + */ +static VALUE +rb_dlcfunc_set_ctype(VALUE self, VALUE ctype) +{ + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + cfunc->type = NUM2INT(ctype); + return ctype; +} + +/* + * call-seq: + * cfunc.calltype => symbol + * + * Get the call type of this function. + */ +static VALUE +rb_dlcfunc_calltype(VALUE self) +{ + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + return ID2SYM(cfunc->calltype); +} + +/* + * call-seq: + * cfunc.calltype = symbol + * + * Set the call type for this function. + */ +static VALUE +rb_dlcfunc_set_calltype(VALUE self, VALUE sym) +{ + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + cfunc->calltype = SYM2ID(sym); + return sym; +} + +/* + * call-seq: + * cfunc.ptr + * + * Get the underlying function pointer as a DL::CPtr object. + */ +static VALUE +rb_dlcfunc_ptr(VALUE self) +{ + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + return PTR2NUM(cfunc->ptr); +} + +/* + * call-seq: + * cfunc.ptr = pointer + * + * Set the underlying function pointer to a DL::CPtr named +pointer+. + */ +static VALUE +rb_dlcfunc_set_ptr(VALUE self, VALUE addr) +{ + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + cfunc->ptr = NUM2PTR(addr); + + return Qnil; +} + +/* + * call-seq: inspect + * + * Returns a string formatted with an easily readable representation of the + * internal state of the DL::CFunc + */ +static VALUE +rb_dlcfunc_inspect(VALUE self) +{ + VALUE val; + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + + val = rb_sprintf("#<DL::CFunc:%p ptr=%p type=%d name='%s'>", + cfunc, + cfunc->ptr, + cfunc->type, + cfunc->name ? cfunc->name : ""); + OBJ_TAINT(val); + return val; +} + + +# define DECL_FUNC_CDECL(f,ret,args,val) \ + ret (FUNC_CDECL(*(f)))(args) = (ret (FUNC_CDECL(*))(args))(VALUE)(val) +#ifdef FUNC_STDCALL +# define DECL_FUNC_STDCALL(f,ret,args,val) \ + ret (FUNC_STDCALL(*(f)))(args) = (ret (FUNC_STDCALL(*))(args))(VALUE)(val) +#endif + +#define CALL_CASE switch( RARRAY_LEN(ary) ){ \ + CASE(0); break; \ + CASE(1); break; CASE(2); break; CASE(3); break; CASE(4); break; CASE(5); break; \ + CASE(6); break; CASE(7); break; CASE(8); break; CASE(9); break; CASE(10);break; \ + CASE(11);break; CASE(12);break; CASE(13);break; CASE(14);break; CASE(15);break; \ + CASE(16);break; CASE(17);break; CASE(18);break; CASE(19);break; CASE(20);break; \ + default: rb_raise(rb_eArgError, "too many arguments"); \ +} + + +#if defined(_MSC_VER) && defined(_M_AMD64) && _MSC_VER >= 1400 && _MSC_VER < 1600 +# pragma optimize("", off) +#endif +/* + * call-seq: + * dlcfunc.call(ary) => some_value + * dlcfunc[ary] => some_value + * + * Calls the function pointer passing in +ary+ as values to the underlying + * C function. The return value depends on the ctype. + */ +static VALUE +rb_dlcfunc_call(VALUE self, VALUE ary) +{ + struct cfunc_data *cfunc; + int i; + DLSTACK_TYPE stack[DLSTACK_SIZE]; + VALUE result = Qnil; + + rb_secure_update(self); + + memset(stack, 0, sizeof(DLSTACK_TYPE) * DLSTACK_SIZE); + Check_Type(ary, T_ARRAY); + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + + if( cfunc->ptr == 0 ){ + rb_raise(rb_eDLError, "can't call null-function"); + return Qnil; + } + + for( i = 0; i < RARRAY_LEN(ary); i++ ){ + VALUE arg; + if( i >= DLSTACK_SIZE ){ + rb_raise(rb_eDLError, "too many arguments (stack overflow)"); + } + arg = rb_to_int(RARRAY_PTR(ary)[i]); + rb_check_safe_obj(arg); + if (FIXNUM_P(arg)) { + stack[i] = (DLSTACK_TYPE)FIX2LONG(arg); + } + else if (RB_TYPE_P(arg, T_BIGNUM)) { +#if SIZEOF_VOIDP == SIZEOF_LONG + stack[i] = (DLSTACK_TYPE)rb_big2ulong_pack(arg); +#else + stack[i] = (DLSTACK_TYPE)rb_big2ull(arg); +#endif + } + else { + Check_Type(arg, T_FIXNUM); + } + } + + /* calltype == CFUNC_CDECL */ + if( cfunc->calltype == CFUNC_CDECL +#ifndef FUNC_STDCALL + || cfunc->calltype == CFUNC_STDCALL +#endif + ){ + switch( cfunc->type ){ + case DLTYPE_VOID: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,void,DLSTACK_PROTO##n,cfunc->ptr); \ + f(DLSTACK_ARGS##n(stack)); \ + result = Qnil; \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_VOIDP: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,void*,DLSTACK_PROTO##n,cfunc->ptr); \ + void * ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = PTR2NUM(ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_CHAR: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,char,DLSTACK_PROTO##n,cfunc->ptr); \ + char ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = CHR2FIX(ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_SHORT: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,short,DLSTACK_PROTO##n,cfunc->ptr); \ + short ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = INT2NUM((int)ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_INT: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,int,DLSTACK_PROTO##n,cfunc->ptr); \ + int ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = INT2NUM(ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_LONG: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,long,DLSTACK_PROTO##n,cfunc->ptr); \ + long ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = LONG2NUM(ret); \ +} + CALL_CASE; +#undef CASE + break; +#if HAVE_LONG_LONG /* used in ruby.h */ + case DLTYPE_LONG_LONG: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,LONG_LONG,DLSTACK_PROTO##n,cfunc->ptr); \ + LONG_LONG ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = LL2NUM(ret); \ +} + CALL_CASE; +#undef CASE + break; +#endif + case DLTYPE_FLOAT: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,float,DLSTACK_PROTO##n,cfunc->ptr); \ + float ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = rb_float_new(ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_DOUBLE: +#define CASE(n) case n: { \ + DECL_FUNC_CDECL(f,double,DLSTACK_PROTO##n,cfunc->ptr); \ + double ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = rb_float_new(ret); \ +} + CALL_CASE; +#undef CASE + break; + default: + rb_raise(rb_eDLTypeError, "unknown type %d", cfunc->type); + } + } +#ifdef FUNC_STDCALL + else if( cfunc->calltype == CFUNC_STDCALL ){ + /* calltype == CFUNC_STDCALL */ + switch( cfunc->type ){ + case DLTYPE_VOID: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,void,DLSTACK_PROTO##n##_,cfunc->ptr); \ + f(DLSTACK_ARGS##n(stack)); \ + result = Qnil; \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_VOIDP: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,void*,DLSTACK_PROTO##n##_,cfunc->ptr); \ + void * ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = PTR2NUM(ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_CHAR: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,char,DLSTACK_PROTO##n##_,cfunc->ptr); \ + char ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = CHR2FIX(ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_SHORT: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,short,DLSTACK_PROTO##n##_,cfunc->ptr); \ + short ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = INT2NUM((int)ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_INT: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,int,DLSTACK_PROTO##n##_,cfunc->ptr); \ + int ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = INT2NUM(ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_LONG: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,long,DLSTACK_PROTO##n##_,cfunc->ptr); \ + long ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = LONG2NUM(ret); \ +} + CALL_CASE; +#undef CASE + break; +#if HAVE_LONG_LONG /* used in ruby.h */ + case DLTYPE_LONG_LONG: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,LONG_LONG,DLSTACK_PROTO##n##_,cfunc->ptr); \ + LONG_LONG ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = LL2NUM(ret); \ +} + CALL_CASE; +#undef CASE + break; +#endif + case DLTYPE_FLOAT: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,float,DLSTACK_PROTO##n##_,cfunc->ptr); \ + float ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = rb_float_new(ret); \ +} + CALL_CASE; +#undef CASE + break; + case DLTYPE_DOUBLE: +#define CASE(n) case n: { \ + DECL_FUNC_STDCALL(f,double,DLSTACK_PROTO##n##_,cfunc->ptr); \ + double ret; \ + ret = f(DLSTACK_ARGS##n(stack)); \ + result = rb_float_new(ret); \ +} + CALL_CASE; +#undef CASE + break; + default: + rb_raise(rb_eDLTypeError, "unknown type %d", cfunc->type); + } + } +#endif + else{ + const char *name = rb_id2name(cfunc->calltype); + if( name ){ + rb_raise(rb_eDLError, "unsupported call type: %s", + name); + } + else{ + rb_raise(rb_eDLError, "unsupported call type: %"PRIxVALUE, + cfunc->calltype); + } + } + + rb_dl_set_last_error(self, INT2NUM(errno)); +#if defined(_WIN32) + rb_dl_set_win32_last_error(self, INT2NUM(GetLastError())); +#endif + + return result; +} +#if defined(_MSC_VER) && defined(_M_AMD64) && _MSC_VER >= 1400 && _MSC_VER < 1600 +# pragma optimize("", on) +#endif + +/* + * call-seq: + * dlfunc.to_i => integer + * + * Returns the memory location of this function pointer as an integer. + */ +static VALUE +rb_dlcfunc_to_i(VALUE self) +{ + struct cfunc_data *cfunc; + + TypedData_Get_Struct(self, struct cfunc_data, &dlcfunc_data_type, cfunc); + return PTR2NUM(cfunc->ptr); +} + +void +Init_dlcfunc(void) +{ + id_last_error = rb_intern("__DL2_LAST_ERROR__"); +#if defined(_WIN32) + id_win32_last_error = rb_intern("__DL2_WIN32_LAST_ERROR__"); +#endif + + /* + * Document-class: DL::CFunc + * + * A direct accessor to a function in a C library + * + * == Example + * + * libc_so = "/lib64/libc.so.6" + * => "/lib64/libc.so.6" + * libc = DL::dlopen(libc_so) + * => #<DL::Handle:0x00000000e05b00> + * @cfunc = DL::CFunc.new(libc,['strcpy'], DL::TYPE_VOIDP, 'strcpy') + * => #<DL::CFunc:0x000000012daec0 ptr=0x007f62ca5a8300 type=1 name='strcpy'> + * + */ + rb_cDLCFunc = rb_define_class_under(rb_mDL, "CFunc", rb_cObject); + rb_define_alloc_func(rb_cDLCFunc, rb_dlcfunc_s_allocate); + + /* + * Document-method: last_error + * + * Returns the last error for the current executing thread + */ + rb_define_module_function(rb_cDLCFunc, "last_error", rb_dl_get_last_error, 0); +#if defined(_WIN32) + + /* + * Document-method: win32_last_error + * + * Returns the last win32 error for the current executing thread + */ + rb_define_module_function(rb_cDLCFunc, "win32_last_error", rb_dl_get_win32_last_error, 0); +#endif + rb_define_method(rb_cDLCFunc, "initialize", rb_dlcfunc_initialize, -1); + rb_define_method(rb_cDLCFunc, "call", rb_dlcfunc_call, 1); + rb_define_method(rb_cDLCFunc, "[]", rb_dlcfunc_call, 1); + rb_define_method(rb_cDLCFunc, "name", rb_dlcfunc_name, 0); + rb_define_method(rb_cDLCFunc, "ctype", rb_dlcfunc_ctype, 0); + rb_define_method(rb_cDLCFunc, "ctype=", rb_dlcfunc_set_ctype, 1); + rb_define_method(rb_cDLCFunc, "calltype", rb_dlcfunc_calltype, 0); + rb_define_method(rb_cDLCFunc, "calltype=", rb_dlcfunc_set_calltype, 1); + rb_define_method(rb_cDLCFunc, "ptr", rb_dlcfunc_ptr, 0); + rb_define_method(rb_cDLCFunc, "ptr=", rb_dlcfunc_set_ptr, 1); + rb_define_method(rb_cDLCFunc, "inspect", rb_dlcfunc_inspect, 0); + rb_define_method(rb_cDLCFunc, "to_s", rb_dlcfunc_inspect, 0); + rb_define_method(rb_cDLCFunc, "to_i", rb_dlcfunc_to_i, 0); +} |