function_t dylib_proc(dylib_t lib, const char *proc)
{
function_t sym;
void *ptr_sym = NULL;
#ifdef _WIN32
sym = (function_t)GetProcAddress(lib ?
(HMODULE)lib : GetModuleHandle(NULL), proc);
if (!sym)
{
set_dl_error();
return NULL;
}
last_dyn_error[0] = 0;
#else
if (lib)
ptr_sym = dlsym(lib, proc);
else
{
void *handle = dlopen(NULL, RTLD_LAZY);
if (handle)
{
ptr_sym = dlsym(handle, proc);
dlclose(handle);
}
}
/* Dirty hack to workaround the non-legality of
* (void*) -> fn-pointer casts. */
memcpy(&sym, &ptr_sym, sizeof(void*));
#endif
return sym;
}
int
dlclose(void *handle)
{
if (!FreeLibrary((HMODULE) handle))
{
set_dl_error();
return 1;
}
last_dyn_error[0] = 0;
return 0;
}
/**
* dylib_close:
* @lib : Library handle.
*
* Frees library handle.
**/
void dylib_close(dylib_t lib)
{
#ifdef _WIN32
if (!FreeLibrary((HMODULE)lib))
set_dl_error();
last_dyn_error[0] = 0;
#else
#ifndef NO_DLCLOSE
dlclose(lib);
#endif
#endif
}
void *
dlsym(void *handle, const char *symbol)
{
void *ptr;
ptr = GetProcAddress((HMODULE) handle, symbol);
if (!ptr)
{
set_dl_error();
return NULL;
}
last_dyn_error[0] = 0;
return ptr;
}
void *
dlopen(const char *file, int mode)
{
HMODULE h;
int prevmode;
/* Disable popup error messages when loading DLLs */
prevmode = SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
h = LoadLibrary(file);
SetErrorMode(prevmode);
if (!h)
{
set_dl_error();
return NULL;
}
last_dyn_error[0] = 0;
return (void *) h;
}
/**
* dylib_load:
* @path : Path to libretro core library.
*
* Platform independent dylib loading.
*
* Returns: library handle on success, otherwise NULL.
**/
dylib_t dylib_load(const char *path)
{
#ifdef _WIN32
int prevmode = SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
dylib_t lib = LoadLibrary(path);
SetErrorMode(prevmode);
if (!lib)
{
set_dl_error();
return NULL;
}
last_dyn_error[0] = 0;
#else
dylib_t lib = dlopen(path, RTLD_LAZY);
#endif
return lib;
}
