mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-23 16:09:47 +00:00
151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/* Copyright (C) 2010-2017 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (dylib.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <dynamic/dylib.h>
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#ifdef NEED_DYNAMIC
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#ifdef _WIN32
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#include <compat/posix_string.h>
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#include <windows.h>
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#else
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#include <dlfcn.h>
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#endif
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#ifdef _WIN32
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static char last_dyn_error[512];
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static void set_dl_error(void)
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{
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DWORD err = GetLastError();
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if (FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS |
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FORMAT_MESSAGE_FROM_SYSTEM,
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NULL,
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err,
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MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT),
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last_dyn_error,
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sizeof(last_dyn_error) - 1,
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NULL) == 0)
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snprintf(last_dyn_error, sizeof(last_dyn_error) - 1,
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"unknown error %lu", err);
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}
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#endif
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/**
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* dylib_load:
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* @path : Path to libretro core library.
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*
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* Platform independent dylib loading.
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*
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* Returns: library handle on success, otherwise NULL.
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**/
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dylib_t dylib_load(const char *path)
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{
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#ifdef _WIN32
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int prevmode = SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
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dylib_t lib = LoadLibrary(path);
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SetErrorMode(prevmode);
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if (!lib)
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{
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set_dl_error();
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return NULL;
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}
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last_dyn_error[0] = 0;
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#else
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dylib_t lib = dlopen(path, RTLD_LAZY);
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#endif
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return lib;
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}
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char *dylib_error(void)
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{
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#ifdef _WIN32
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if (last_dyn_error[0])
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return last_dyn_error;
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return NULL;
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#else
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return (char*)dlerror();
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#endif
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}
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function_t dylib_proc(dylib_t lib, const char *proc)
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{
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function_t sym;
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#ifdef _WIN32
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sym = (function_t)GetProcAddress(lib ?
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(HMODULE)lib : GetModuleHandle(NULL), proc);
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if (!sym)
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{
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set_dl_error();
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return NULL;
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}
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last_dyn_error[0] = 0;
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#else
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void *ptr_sym = NULL;
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if (lib)
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ptr_sym = dlsym(lib, proc);
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else
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{
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void *handle = dlopen(NULL, RTLD_LAZY);
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if (handle)
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{
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ptr_sym = dlsym(handle, proc);
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dlclose(handle);
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}
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}
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/* Dirty hack to workaround the non-legality of
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* (void*) -> fn-pointer casts. */
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memcpy(&sym, &ptr_sym, sizeof(void*));
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#endif
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return sym;
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}
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/**
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* dylib_close:
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* @lib : Library handle.
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*
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* Frees library handle.
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**/
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void dylib_close(dylib_t lib)
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{
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#ifdef _WIN32
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if (!FreeLibrary((HMODULE)lib))
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set_dl_error();
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last_dyn_error[0] = 0;
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#else
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#ifndef NO_DLCLOSE
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dlclose(lib);
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#endif
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#endif
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}
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#endif
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