diff options
Diffstat (limited to 'ext/dl/handle.c')
| -rw-r--r-- | ext/dl/handle.c | 431 |
1 files changed, 0 insertions, 431 deletions
diff --git a/ext/dl/handle.c b/ext/dl/handle.c deleted file mode 100644 index 6b90e089ee..0000000000 --- a/ext/dl/handle.c +++ /dev/null @@ -1,431 +0,0 @@ -/* -*- C -*- - * $Id$ - */ - -#include <ruby.h> -#include "dl.h" - -VALUE rb_cDLHandle; - -#ifdef _WIN32 -# ifndef _WIN32_WCE -static void * -w32_coredll(void) -{ - MEMORY_BASIC_INFORMATION m; - memset(&m, 0, sizeof(m)); - if( !VirtualQuery(_errno, &m, sizeof(m)) ) return NULL; - return m.AllocationBase; -} -# endif - -static int -w32_dlclose(void *ptr) -{ -# ifndef _WIN32_WCE - if( ptr == w32_coredll() ) return 0; -# endif - if( FreeLibrary((HMODULE)ptr) ) return 0; - return errno = rb_w32_map_errno(GetLastError()); -} -#define dlclose(ptr) w32_dlclose(ptr) -#endif - -static void -dlhandle_free(void *ptr) -{ - struct dl_handle *dlhandle = ptr; - if( dlhandle->ptr && dlhandle->open && dlhandle->enable_close ){ - dlclose(dlhandle->ptr); - } - xfree(ptr); -} - -static size_t -dlhandle_memsize(const void *ptr) -{ - return ptr ? sizeof(struct dl_handle) : 0; -} - -static const rb_data_type_t dlhandle_data_type = { - "dl/handle", - {0, dlhandle_free, dlhandle_memsize,}, -}; - -/* - * call-seq: close - * - * Close this DL::Handle. Calling close more than once will raise a - * DL::DLError exception. - */ -VALUE -rb_dlhandle_close(VALUE self) -{ - struct dl_handle *dlhandle; - - TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle); - if(dlhandle->open) { - int ret = dlclose(dlhandle->ptr); - dlhandle->open = 0; - - /* Check dlclose for successful return value */ - if(ret) { -#if defined(HAVE_DLERROR) - rb_raise(rb_eDLError, "%s", dlerror()); -#else - rb_raise(rb_eDLError, "could not close handle"); -#endif - } - return INT2NUM(ret); - } - rb_raise(rb_eDLError, "dlclose() called too many times"); - - UNREACHABLE; -} - -VALUE -rb_dlhandle_s_allocate(VALUE klass) -{ - VALUE obj; - struct dl_handle *dlhandle; - - obj = TypedData_Make_Struct(rb_cDLHandle, struct dl_handle, &dlhandle_data_type, dlhandle); - dlhandle->ptr = 0; - dlhandle->open = 0; - dlhandle->enable_close = 0; - - return obj; -} - -static VALUE -predefined_dlhandle(void *handle) -{ - VALUE obj = rb_dlhandle_s_allocate(rb_cDLHandle); - struct dl_handle *dlhandle = DATA_PTR(obj); - - dlhandle->ptr = handle; - dlhandle->open = 1; - OBJ_FREEZE(obj); - return obj; -} - -/* - * call-seq: - * initialize(lib = nil, flags = DL::RTLD_LAZY | DL::RTLD_GLOBAL) - * - * Create a new handler that opens library named +lib+ with +flags+. If no - * library is specified, RTLD_DEFAULT is used. - */ -VALUE -rb_dlhandle_initialize(int argc, VALUE argv[], VALUE self) -{ - void *ptr; - struct dl_handle *dlhandle; - VALUE lib, flag; - char *clib; - int cflag; - const char *err; - - switch( rb_scan_args(argc, argv, "02", &lib, &flag) ){ - case 0: - clib = NULL; - cflag = RTLD_LAZY | RTLD_GLOBAL; - break; - case 1: - clib = NIL_P(lib) ? NULL : StringValuePtr(lib); - cflag = RTLD_LAZY | RTLD_GLOBAL; - break; - case 2: - clib = NIL_P(lib) ? NULL : StringValuePtr(lib); - cflag = NUM2INT(flag); - break; - default: - rb_bug("rb_dlhandle_new"); - } - - rb_secure(2); - -#if defined(_WIN32) - if( !clib ){ - HANDLE rb_libruby_handle(void); - ptr = rb_libruby_handle(); - } - else if( STRCASECMP(clib, "libc") == 0 -# ifdef RUBY_COREDLL - || STRCASECMP(clib, RUBY_COREDLL) == 0 - || STRCASECMP(clib, RUBY_COREDLL".dll") == 0 -# endif - ){ -# ifdef _WIN32_WCE - ptr = dlopen("coredll.dll", cflag); -# else - ptr = w32_coredll(); -# endif - } - else -#endif - ptr = dlopen(clib, cflag); -#if defined(HAVE_DLERROR) - if( !ptr && (err = dlerror()) ){ - rb_raise(rb_eDLError, "%s", err); - } -#else - if( !ptr ){ - err = dlerror(); - rb_raise(rb_eDLError, "%s", err); - } -#endif - TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle); - if( dlhandle->ptr && dlhandle->open && dlhandle->enable_close ){ - dlclose(dlhandle->ptr); - } - dlhandle->ptr = ptr; - dlhandle->open = 1; - dlhandle->enable_close = 0; - - if( rb_block_given_p() ){ - rb_ensure(rb_yield, self, rb_dlhandle_close, self); - } - - return Qnil; -} - -/* - * call-seq: enable_close - * - * Enable a call to dlclose() when this DL::Handle is garbage collected. - */ -VALUE -rb_dlhandle_enable_close(VALUE self) -{ - struct dl_handle *dlhandle; - - TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle); - dlhandle->enable_close = 1; - return Qnil; -} - -/* - * call-seq: disable_close - * - * Disable a call to dlclose() when this DL::Handle is garbage collected. - */ -VALUE -rb_dlhandle_disable_close(VALUE self) -{ - struct dl_handle *dlhandle; - - TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle); - dlhandle->enable_close = 0; - return Qnil; -} - -/* - * call-seq: close_enabled? - * - * Returns +true+ if dlclose() will be called when this DL::Handle is - * garbage collected. - */ -static VALUE -rb_dlhandle_close_enabled_p(VALUE self) -{ - struct dl_handle *dlhandle; - - TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle); - - if(dlhandle->enable_close) return Qtrue; - return Qfalse; -} - -/* - * call-seq: to_i - * - * Returns the memory address for this handle. - */ -VALUE -rb_dlhandle_to_i(VALUE self) -{ - struct dl_handle *dlhandle; - - TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle); - return PTR2NUM(dlhandle); -} - -static VALUE dlhandle_sym(void *handle, const char *symbol); - -/* - * Document-method: sym - * Document-method: [] - * - * call-seq: sym(name) - * - * Get the address as an Integer for the function named +name+. - */ -VALUE -rb_dlhandle_sym(VALUE self, VALUE sym) -{ - struct dl_handle *dlhandle; - - TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle); - if( ! dlhandle->open ){ - rb_raise(rb_eDLError, "closed handle"); - } - - return dlhandle_sym(dlhandle->ptr, StringValueCStr(sym)); -} - -#ifndef RTLD_NEXT -#define RTLD_NEXT NULL -#endif -#ifndef RTLD_DEFAULT -#define RTLD_DEFAULT NULL -#endif - -/* - * Document-method: sym - * Document-method: [] - * - * call-seq: sym(name) - * - * Get the address as an Integer for the function named +name+. The function - * is searched via dlsym on RTLD_NEXT. See man(3) dlsym() for more info. - */ -VALUE -rb_dlhandle_s_sym(VALUE self, VALUE sym) -{ - return dlhandle_sym(RTLD_NEXT, StringValueCStr(sym)); -} - -static VALUE -dlhandle_sym(void *handle, const char *name) -{ -#if defined(HAVE_DLERROR) - const char *err; -# define CHECK_DLERROR if( err = dlerror() ){ func = 0; } -#else -# define CHECK_DLERROR -#endif - void (*func)(); - - rb_secure(2); -#ifdef HAVE_DLERROR - dlerror(); -#endif - func = (void (*)())(VALUE)dlsym(handle, name); - CHECK_DLERROR; -#if defined(FUNC_STDCALL) - if( !func ){ - int i; - int len = (int)strlen(name); - char *name_n; -#if defined(__CYGWIN__) || defined(_WIN32) || defined(__MINGW32__) - { - char *name_a = (char*)xmalloc(len+2); - strcpy(name_a, name); - name_n = name_a; - name_a[len] = 'A'; - name_a[len+1] = '\0'; - func = dlsym(handle, name_a); - CHECK_DLERROR; - if( func ) goto found; - name_n = xrealloc(name_a, len+6); - } -#else - name_n = (char*)xmalloc(len+6); -#endif - memcpy(name_n, name, len); - name_n[len++] = '@'; - for( i = 0; i < 256; i += 4 ){ - sprintf(name_n + len, "%d", i); - func = dlsym(handle, name_n); - CHECK_DLERROR; - if( func ) break; - } - if( func ) goto found; - name_n[len-1] = 'A'; - name_n[len++] = '@'; - for( i = 0; i < 256; i += 4 ){ - sprintf(name_n + len, "%d", i); - func = dlsym(handle, name_n); - CHECK_DLERROR; - if( func ) break; - } - found: - xfree(name_n); - } -#endif - if( !func ){ - rb_raise(rb_eDLError, "unknown symbol \"%s\"", name); - } - - return PTR2NUM(func); -} - -void -Init_dlhandle(void) -{ - /* - * Document-class: DL::Handle - * - * The DL::Handle is the manner to access the dynamic library - * - * == Example - * - * === Setup - * - * libc_so = "/lib64/libc.so.6" - * => "/lib64/libc.so.6" - * @handle = DL::Handle.new(libc_so) - * => #<DL::Handle:0x00000000d69ef8> - * - * === Setup, with flags - * - * libc_so = "/lib64/libc.so.6" - * => "/lib64/libc.so.6" - * @handle = DL::Handle.new(libc_so, DL::RTLD_LAZY | DL::RTLD_GLOBAL) - * => #<DL::Handle:0x00000000d69ef8> - * - * === Addresses to symbols - * - * strcpy_addr = @handle['strcpy'] - * => 140062278451968 - * - * or - * - * strcpy_addr = @handle.sym('strcpy') - * => 140062278451968 - * - */ - rb_cDLHandle = rb_define_class_under(rb_mDL, "Handle", rb_cObject); - rb_define_alloc_func(rb_cDLHandle, rb_dlhandle_s_allocate); - rb_define_singleton_method(rb_cDLHandle, "sym", rb_dlhandle_s_sym, 1); - rb_define_singleton_method(rb_cDLHandle, "[]", rb_dlhandle_s_sym, 1); - - /* Document-const: NEXT - * - * A predefined pseudo-handle of RTLD_NEXT - * - * Which will find the next occurrence of a function in the search order - * after the current library. - */ - rb_define_const(rb_cDLHandle, "NEXT", predefined_dlhandle(RTLD_NEXT)); - - /* Document-const: DEFAULT - * - * A predefined pseudo-handle of RTLD_DEFAULT - * - * Which will find the first occurrence of the desired symbol using the - * default library search order - */ - rb_define_const(rb_cDLHandle, "DEFAULT", predefined_dlhandle(RTLD_DEFAULT)); - rb_define_method(rb_cDLHandle, "initialize", rb_dlhandle_initialize, -1); - rb_define_method(rb_cDLHandle, "to_i", rb_dlhandle_to_i, 0); - rb_define_method(rb_cDLHandle, "close", rb_dlhandle_close, 0); - rb_define_method(rb_cDLHandle, "sym", rb_dlhandle_sym, 1); - rb_define_method(rb_cDLHandle, "[]", rb_dlhandle_sym, 1); - rb_define_method(rb_cDLHandle, "disable_close", rb_dlhandle_disable_close, 0); - rb_define_method(rb_cDLHandle, "enable_close", rb_dlhandle_enable_close, 0); - rb_define_method(rb_cDLHandle, "close_enabled?", rb_dlhandle_close_enabled_p, 0); -} - -/* mode: c; tab-with=8; sw=4; ts=8; noexpandtab: */ |