/* 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 .
*/
#include "autosave.h"
#include "SDL.h"
#include
#include
#include
#include
#include "general.h"
struct autosave
{
volatile bool quit;
SDL_mutex *lock;
SDL_mutex *cond_lock;
SDL_cond *cond;
SDL_Thread *thread;
void *buffer;
const void *snes_buffer;
const char *path;
size_t bufsize;
unsigned interval;
};
static int autosave_thread(void *data)
{
autosave_t *save = data;
while (!save->quit)
{
autosave_lock(save);
memcpy(save->buffer, save->snes_buffer, save->bufsize);
autosave_unlock(save);
// Should probably deal with this more elegantly.
FILE *file = fopen(save->path, "wb");
if (file)
{
SSNES_LOG("Autosaving SRAM to \"%s\"\n", save->path);
bool failed = false;
failed |= fwrite(save->buffer, 1, save->bufsize, file) != save->bufsize;
failed |= fflush(file) != 0;
failed |= fclose(file) != 0;
if (failed)
SSNES_WARN("Failed to autosave SRAM! Disk might be full.\n");
}
SDL_mutexP(save->cond_lock);
if (!save->quit)
SDL_CondWaitTimeout(save->cond, save->cond_lock, save->interval * 1000);
SDL_mutexV(save->cond_lock);
}
return 0;
}
autosave_t *autosave_new(const char *path, const void *data, size_t size, unsigned interval)
{
autosave_t *handle = calloc(1, sizeof(*handle));
if (!handle)
return NULL;
handle->bufsize = size;
handle->interval = interval;
handle->path = path;
handle->buffer = malloc(size);
handle->snes_buffer = data;
if (!handle->buffer)
{
free(handle);
return NULL;
}
handle->lock = SDL_CreateMutex();
handle->cond_lock = SDL_CreateMutex();
handle->cond = SDL_CreateCond();
handle->thread = SDL_CreateThread(autosave_thread, handle);
return handle;
}
void autosave_lock(autosave_t *handle)
{
SDL_mutexP(handle->lock);
}
void autosave_unlock(autosave_t *handle)
{
SDL_mutexV(handle->lock);
}
void autosave_free(autosave_t *handle)
{
SDL_mutexP(handle->cond_lock);
handle->quit = true;
SDL_mutexV(handle->cond_lock);
SDL_CondSignal(handle->cond);
SDL_WaitThread(handle->thread, NULL);
SDL_DestroyMutex(handle->lock);
SDL_DestroyMutex(handle->cond_lock);
SDL_DestroyCond(handle->cond);
free(handle->buffer);
free(handle);
}
void lock_autosave(void)
{
for (unsigned i = 0; i < sizeof(g_extern.autosave)/sizeof(g_extern.autosave[0]); i++)
{
if (g_extern.autosave[i])
autosave_lock(g_extern.autosave[i]);
}
}
void unlock_autosave(void)
{
for (unsigned i = 0; i < sizeof(g_extern.autosave)/sizeof(g_extern.autosave[0]); i++)
{
if (g_extern.autosave[i])
autosave_unlock(g_extern.autosave[i]);
}
}