void power_off(void)
{
/* Shut down SDL event loop */
SDL_Event event;
memset(&event, 0, sizeof(SDL_Event));
event.type = SDL_USEREVENT;
SDL_PushEvent(&event);
#ifdef HAVE_SDL_THREADS
/* since sim_thread_shutdown() grabs the mutex we need to let it free,
* otherwise SDL_WaitThread will deadlock */
struct thread_entry* t = sim_thread_unlock();
#endif
/* wait for event thread to finish */
SDL_WaitThread(evt_thread, NULL);
#ifdef HAVE_SDL_THREADS
/* lock again before entering the scheduler */
sim_thread_lock(t);
/* sim_thread_shutdown() will cause sim_do_exit() to be called via longjmp,
* but only if we let the sdl thread scheduler exit the other threads */
while(1) yield();
#else
sim_do_exit();
#endif
}
void system_reboot(void)
{
#ifdef HAVE_SDL_THREADS
sim_thread_exception_wait();
#else
sim_do_exit();
#endif
}
/* Initialize SDL threading */
void init_threads(void)
{
struct thread_entry *thread;
int n;
memset(cores, 0, sizeof(cores));
memset(threads, 0, sizeof(threads));
m = SDL_CreateMutex();
if (SDL_LockMutex(m) == -1)
{
fprintf(stderr, "Couldn't lock mutex\n");
return;
}
/* Initialize all IDs */
for (n = 0; n < MAXTHREADS; n++)
threads[n].id = THREAD_ID_INIT(n);
/* Slot 0 is reserved for the main thread - initialize it here and
then create the SDL thread - it is possible to have a quick, early
shutdown try to access the structure. */
thread = &threads[0];
thread->stack = (uintptr_t *)" ";
thread->stack_size = 8;
thread->name = "main";
thread->state = STATE_RUNNING;
thread->context.s = SDL_CreateSemaphore(0);
thread->context.t = NULL; /* NULL for the implicit main thread */
cores[CURRENT_CORE].running = thread;
if (thread->context.s == NULL)
{
fprintf(stderr, "Failed to create main semaphore\n");
return;
}
/* Tell all threads jump back to their start routines, unlock and exit
gracefully - we'll check each one in turn for it's status. Threads
_could_ terminate via remove_thread or multiple threads could exit
on each unlock but that is safe. */
/* Setup jump for exit */
if (setjmp(thread_jmpbufs[0]) == 0)
{
THREAD_SDL_DEBUGF("Main thread: %p\n", thread);
return;
}
SDL_UnlockMutex(m);
/* Set to 'COMMAND_DONE' when other rockbox threads have exited. */
while (threads_status < THREADS_EXIT_COMMAND_DONE)
SDL_Delay(10);
SDL_DestroyMutex(m);
/* We're the main thead - perform exit - doesn't return. */
sim_do_exit();
}
