mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-23 16:09:47 +00:00
44c52ca4f8
Fix portability issues with void* -> void (*)(void) casts. Use a more ... bizarre technique ;)
242 lines
7.2 KiB
C
242 lines
7.2 KiB
C
/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
|
|
* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
|
|
*
|
|
* Some code herein may be based on code found in BSNES.
|
|
*
|
|
* SSNES is free software: you can redistribute it and/or modify it under the terms
|
|
* of the GNU General Public License as published by the Free Software Found-
|
|
* ation, either version 3 of the License, or (at your option) any later version.
|
|
*
|
|
* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
|
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
* PURPOSE. See the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with SSNES.
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "dynamic.h"
|
|
#include "general.h"
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <libsnes.hpp>
|
|
|
|
#ifdef _WIN32
|
|
#include <windows.h>
|
|
#else
|
|
#include <dlfcn.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_DYNAMIC
|
|
#define DLSYM(lib, x) dylib_proc(lib, #x)
|
|
|
|
#define SYM(type, x) do { \
|
|
p##x = (type)DLSYM(lib_handle, x); \
|
|
if (p##x == NULL) { SSNES_ERR("Failed to load symbol: \"%s\"\n", #x); exit(1); } \
|
|
} while(0)
|
|
|
|
#define OPT_SYM(type, x) do { \
|
|
p##x = (type)DLSYM(lib_handle, x); \
|
|
} while(0)
|
|
|
|
static dylib_t lib_handle = NULL;
|
|
#endif
|
|
|
|
|
|
void (*psnes_init)(void);
|
|
|
|
void (*psnes_set_video_refresh)(snes_video_refresh_t);
|
|
void (*psnes_set_audio_sample)(snes_audio_sample_t);
|
|
void (*psnes_set_input_poll)(snes_input_poll_t);
|
|
void (*psnes_set_input_state)(snes_input_state_t);
|
|
|
|
void (*psnes_reset)(void);
|
|
void (*psnes_run)(void);
|
|
|
|
void (*psnes_cheat_reset)(void);
|
|
void (*psnes_cheat_set)(unsigned, bool, const char*);
|
|
|
|
const char *(*psnes_library_id)(void) = NULL;
|
|
unsigned (*psnes_library_revision_minor)(void);
|
|
unsigned (*psnes_library_revision_major)(void);
|
|
|
|
bool (*psnes_load_cartridge_normal)(const char*, const uint8_t*, unsigned);
|
|
bool (*psnes_load_cartridge_super_game_boy)(
|
|
const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned);
|
|
bool (*psnes_load_cartridge_bsx)(
|
|
const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned);
|
|
bool (*psnes_load_cartridge_bsx_slotted)(
|
|
const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned);
|
|
bool (*psnes_load_cartridge_sufami_turbo)(
|
|
const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned);
|
|
|
|
void (*psnes_set_controller_port_device)(bool, unsigned);
|
|
|
|
bool (*psnes_get_region)(void);
|
|
|
|
unsigned (*psnes_serialize_size)(void);
|
|
bool (*psnes_serialize)(uint8_t*, unsigned);
|
|
bool (*psnes_unserialize)(const uint8_t*, unsigned);
|
|
|
|
void (*psnes_set_cartridge_basename)(const char*);
|
|
|
|
uint8_t* (*psnes_get_memory_data)(unsigned);
|
|
unsigned (*psnes_get_memory_size)(unsigned);
|
|
|
|
void (*psnes_unload_cartridge)(void);
|
|
void (*psnes_term)(void);
|
|
|
|
#ifdef HAVE_DYNAMIC
|
|
static void load_dynamic(void)
|
|
{
|
|
SSNES_LOG("Loading dynamic libsnes from: \"%s\"\n", g_settings.libsnes);
|
|
lib_handle = dylib_load(g_settings.libsnes);
|
|
if (!lib_handle)
|
|
{
|
|
SSNES_ERR("Failed to open dynamic library: \"%s\"\n", g_settings.libsnes);
|
|
exit(1);
|
|
}
|
|
|
|
SYM(void (*)(void), snes_init);
|
|
SYM(void (*)(snes_video_refresh_t), snes_set_video_refresh);
|
|
SYM(void (*)(snes_audio_sample_t), snes_set_audio_sample);
|
|
SYM(void (*)(snes_input_poll_t), snes_set_input_poll);
|
|
SYM(void (*)(snes_input_state_t), snes_set_input_state);
|
|
OPT_SYM(const char *(*)(void), snes_library_id);
|
|
SYM(unsigned (*)(void), snes_library_revision_minor);
|
|
SYM(unsigned (*)(void), snes_library_revision_major);
|
|
SYM(void (*)(void), snes_cheat_reset);
|
|
SYM(void (*)(unsigned, bool, const char*), snes_cheat_set);
|
|
SYM(void (*)(void), snes_reset);
|
|
SYM(void (*)(void), snes_run);
|
|
SYM(bool (*)(void), snes_get_region);
|
|
SYM(bool (*)(const char*, const uint8_t*, unsigned), snes_load_cartridge_normal);
|
|
SYM(bool (*)(const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned), snes_load_cartridge_super_game_boy);
|
|
SYM(bool (*)(const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned), snes_load_cartridge_bsx);
|
|
SYM(bool (*)(const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned), snes_load_cartridge_bsx_slotted);
|
|
SYM(bool (*)(const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned,
|
|
const char*, const uint8_t*, unsigned), snes_load_cartridge_sufami_turbo);
|
|
SYM(void (*)(bool, unsigned), snes_set_controller_port_device);
|
|
SYM(unsigned (*)(void), snes_serialize_size);
|
|
SYM(bool (*)(uint8_t*, unsigned), snes_serialize);
|
|
SYM(bool (*)(const uint8_t*, unsigned), snes_unserialize);
|
|
SYM(void (*)(const char*), snes_set_cartridge_basename);
|
|
SYM(uint8_t *(*)(unsigned), snes_get_memory_data);
|
|
SYM(unsigned (*)(unsigned), snes_get_memory_size);
|
|
SYM(void (*)(void), snes_unload_cartridge);
|
|
SYM(void (*)(void), snes_term);
|
|
}
|
|
#endif
|
|
|
|
#define SSYM(x) do { \
|
|
p##x = x; \
|
|
} while(0)
|
|
|
|
#ifndef HAVE_DYNAMIC
|
|
static void set_statics(void)
|
|
{
|
|
SSYM(snes_init);
|
|
SSYM(snes_set_video_refresh);
|
|
SSYM(snes_set_audio_sample);
|
|
SSYM(snes_set_input_poll);
|
|
SSYM(snes_set_input_state);
|
|
SSYM(snes_library_revision_minor);
|
|
SSYM(snes_library_revision_major);
|
|
SSYM(snes_cheat_reset);
|
|
SSYM(snes_cheat_set);
|
|
SSYM(snes_reset);
|
|
SSYM(snes_run);
|
|
SSYM(snes_get_region);
|
|
SSYM(snes_load_cartridge_normal);
|
|
SSYM(snes_load_cartridge_super_game_boy);
|
|
SSYM(snes_load_cartridge_bsx);
|
|
SSYM(snes_load_cartridge_bsx_slotted);
|
|
SSYM(snes_load_cartridge_sufami_turbo);
|
|
SSYM(snes_set_controller_port_device);
|
|
SSYM(snes_serialize_size);
|
|
SSYM(snes_serialize);
|
|
SSYM(snes_unserialize);
|
|
SSYM(snes_set_cartridge_basename);
|
|
SSYM(snes_get_memory_data);
|
|
SSYM(snes_get_memory_size);
|
|
SSYM(snes_unload_cartridge);
|
|
SSYM(snes_term);
|
|
}
|
|
#endif
|
|
|
|
void init_dlsym(void)
|
|
{
|
|
// Guarantee that we can do "dirty" casting. Every OS that this program supports should pass this ...
|
|
assert(sizeof(void*) == sizeof(void (*)(void)));
|
|
|
|
#ifdef HAVE_DYNAMIC
|
|
if (strlen(g_settings.libsnes) > 0)
|
|
load_dynamic();
|
|
else
|
|
{
|
|
SSNES_ERR("This binary is built to use runtime dynamic binding of libsnes. Set libsnes_path in config to load a libsnes library dynamically.\n");
|
|
exit(1);
|
|
}
|
|
#else
|
|
set_statics();
|
|
#endif
|
|
}
|
|
|
|
void uninit_dlsym(void)
|
|
{
|
|
#ifdef HAVE_DYNAMIC
|
|
if (lib_handle)
|
|
dylib_close(lib_handle);
|
|
#endif
|
|
}
|
|
|
|
// Platform independent dylib loading.
|
|
dylib_t dylib_load(const char *path)
|
|
{
|
|
#ifdef _WIN32
|
|
return LoadLibrary(path);
|
|
#else
|
|
return dlopen(path, RTLD_LAZY);
|
|
#endif
|
|
}
|
|
|
|
function_t dylib_proc(dylib_t lib, const char *proc)
|
|
{
|
|
#ifdef _WIN32
|
|
function_t sym = (function_t)GetProcAddress(lib, proc);
|
|
#else
|
|
// Dirty hack to workaround the non-legality of void* -> fn-pointer casts.
|
|
void *ptr_sym = dlsym(lib, proc);
|
|
function_t sym;
|
|
memcpy(&sym, &ptr_sym, sizeof(void*));
|
|
#endif
|
|
|
|
if (!sym)
|
|
SSNES_WARN("Failed to load symbol \"%s\"\n", proc);
|
|
return sym;
|
|
}
|
|
|
|
void dylib_close(dylib_t lib)
|
|
{
|
|
#ifdef _WIN32
|
|
FreeLibrary(lib);
|
|
#else
|
|
dlclose(lib);
|
|
#endif
|
|
}
|
|
|