static void _uninstall_sdl_event_hack(void)
{
if (thread) {
al_set_thread_should_stop(thread);
al_join_thread(thread, NULL);
al_destroy_thread(thread);
}
}
static void pulseaudio_deallocate_voice(ALLEGRO_VOICE *voice)
{
PULSEAUDIO_VOICE *pv = voice->extra;
/* We do NOT hold the voice mutex here, so this does NOT result in a
* deadlock when the thread calls _al_voice_update.
*/
al_set_thread_should_stop(pv->poll_thread);
al_join_thread(pv->poll_thread, NULL);
al_destroy_thread(pv->poll_thread);
al_destroy_mutex(pv->buffer_mutex);
pa_simple_free(pv->s);
al_free(pv);
}
static void hapxi_exit_haptic(void)
{
void *ret_value;
ASSERT(hapxi_thread);
ASSERT(hapxi_mutex);
ASSERT(hapxi_cond);
/* Request the event thread to shut down, signal the condition, then join the thread. */
al_set_thread_should_stop(hapxi_thread);
al_signal_cond(hapxi_cond);
al_join_thread(hapxi_thread, &ret_value);
/* clean it all up. */
al_destroy_thread(hapxi_thread);
al_destroy_cond(hapxi_cond);
al_destroy_mutex(hapxi_mutex);
hapxi_mutex = NULL;
}
void *CreateDisplay(ALLEGRO_THREAD *thr, void *arg)
{
DISPLAY_DATA *data = (DISPLAY_DATA*) arg;
ALLEGRO_DISPLAY *display;
ALLEGRO_EVENT_QUEUE *queue = al_create_event_queue();
if(!queue) {
fprintf(stderr, "failed to create event queue");
return NULL;
}
al_lock_mutex(data->mutex);
display = AllegroNewDisplay(data->sizeX, data->sizeY, queue);
al_broadcast_cond(data->cond);
// Define the size of the image
Window<int> scr(0, data->sizeX, 0, data->sizeY);
// Define the domain in which we test for points
Window<double> fract(data->zoomXmin, data->zoomXmax, data->zoomYmin, data->zoomYmax);
al_unlock_mutex(data->mutex);
// Generate the fractal
Mandelbrot(scr, fract);
while(!al_get_thread_should_stop(thr)) {
ALLEGRO_EVENT ev;
al_wait_for_event(queue, &ev);
if(ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
al_set_thread_should_stop(thr);
al_lock_mutex(data->mutex);
al_broadcast_cond(data->cond);
al_unlock_mutex(data->mutex);
break;
}
}
al_destroy_display(display);
al_destroy_event_queue(queue);
}
/* The stop_voice method should stop playback. For non-streaming voices, it
should leave the data loaded, and reset the voice position to 0. */
static int _openal_stop_voice(ALLEGRO_VOICE* voice)
{
ALLEGRO_AL_DATA *ex_data = voice->extra;
ALenum openal_err;
if (!ex_data->buffers) {
ALLEGRO_WARN("Trying to stop empty voice buffer\n");
return 1;
}
/* if playing a sample */
if (!voice->is_streaming) {
alSourceStop(ex_data->source);
if ((openal_err = alGetError()) != AL_NO_ERROR) {
ALLEGRO_ERROR("Could not stop voice: %s\n",
openal_get_err_str(openal_err));
return 1;
}
return 0;
}
if (ex_data->thread) {
al_set_thread_should_stop(ex_data->thread);
while (!ex_data->stopped) {
al_wait_cond(voice->cond, voice->mutex);
}
al_join_thread(ex_data->thread, NULL);
ex_data->thread = NULL;
ex_data->stopped = false;
}
alSourcei(ex_data->source, AL_BUFFER, 0);
alDeleteSources(1, &ex_data->source);
alDeleteBuffers(ex_data->num_buffers, ex_data->buffers);
al_free(ex_data->buffers);
ex_data->buffers = NULL;
alGetError(); /* required! */
return 0;
}
int main(void)
{
ALLEGRO_THREAD *thread[NUM_THREADS];
ALLEGRO_DISPLAY *display;
ALLEGRO_TIMER *timer;
ALLEGRO_EVENT_QUEUE *queue;
ALLEGRO_EVENT event;
bool need_draw;
int i;
for (i = 0; i < 256; i++) {
sin_lut[i] = 128 + (int) (127.0 * sin(i / 8.0));
}
if (!al_init()) {
abort_example("Could not init Allegro.\n");
return 1;
}
al_install_keyboard();
al_install_mouse();
display = al_create_display(W * IMAGES_PER_ROW,
H * NUM_THREADS / IMAGES_PER_ROW);
if (!display) {
abort_example("Error creating display\n");
return 1;
}
timer = al_install_timer(1.0/3);
if (!timer) {
abort_example("Error creating timer\n");
return 1;
}
queue = al_create_event_queue();
if (!queue) {
abort_example("Error creating event queue\n");
return 1;
}
al_register_event_source(queue, al_get_display_event_source(display));
al_register_event_source(queue, al_get_keyboard_event_source());
al_register_event_source(queue, al_get_mouse_event_source());
al_register_event_source(queue, al_get_timer_event_source(timer));
/* Note:
* Right now, A5 video displays can only be accessed from the thread which
* created them (at lesat for OpenGL). To lift this restriction, we could
* keep track of the current OpenGL context for each thread and make all
* functions accessing the display check for it.. not sure it's worth the
* additional complexity though.
*/
al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT_RGB_888);
al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP);
for (i = 0; i < NUM_THREADS; i++) {
thread_info[i].bitmap = al_create_bitmap(W, H);
if (!thread_info[i].bitmap) {
goto Error;
}
thread_info[i].mutex = al_create_mutex();
if (!thread_info[i].mutex) {
goto Error;
}
thread_info[i].cond = al_create_cond();
if (!thread_info[i].cond) {
goto Error;
}
thread_info[i].is_paused = false;
thread_info[i].random_seed = i;
thread[i] = al_create_thread(thread_func, &thread_info[i]);
if (!thread[i]) {
goto Error;
}
}
set_target(0, -0.56062033041600878303, -0.56064322926933807256);
set_target(1, -0.57798076669230014080, -0.63449861991138123418);
set_target(2, 0.36676836392830602929, -0.59081385302214906030);
set_target(3, -1.48319283039401317303, -0.00000000200514696273);
set_target(4, -0.74052910500707636032, 0.18340899525730713915);
set_target(5, 0.25437906525768350097, -0.00046678223345789554);
set_target(6, -0.56062033041600878303, 0.56064322926933807256);
set_target(7, -0.57798076669230014080, 0.63449861991138123418);
set_target(8, 0.36676836392830602929, 0.59081385302214906030);
for (i = 0; i < NUM_THREADS; i++) {
al_start_thread(thread[i]);
}
al_start_timer(timer);
need_draw = true;
while (true) {
if (need_draw && al_event_queue_is_empty(queue)) {
show_images();
need_draw = false;
}
al_wait_for_event(queue, &event);
if (event.type == ALLEGRO_EVENT_TIMER) {
need_draw = true;
}
else if (event.type == ALLEGRO_EVENT_MOUSE_BUTTON_DOWN) {
int n = (event.mouse.y / H) * IMAGES_PER_ROW + (event.mouse.x / W);
if (n < NUM_THREADS) {
double x = event.mouse.x - (event.mouse.x / W) * W;
double y = event.mouse.y - (event.mouse.y / H) * H;
/* Center to the mouse click position. */
if (thread_info[n].is_paused) {
thread_info[n].target_x = x / W - 0.5;
thread_info[n].target_y = y / H - 0.5;
}
toggle_pausedness(n);
}
}
else if (event.type == ALLEGRO_EVENT_DISPLAY_EXPOSE) {
need_draw = true;
}
else if (event.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
break;
}
else if (event.type == ALLEGRO_EVENT_KEY_DOWN) {
if (event.keyboard.keycode == ALLEGRO_KEY_ESCAPE) {
break;
}
need_draw = true;
}
}
for (i = 0; i < NUM_THREADS; i++) {
/* Set the flag to stop the thread. The thread might be waiting on a
* condition variable, so signal the condition to force it to wake up.
*/
al_set_thread_should_stop(thread[i]);
al_lock_mutex(thread_info[i].mutex);
al_broadcast_cond(thread_info[i].cond);
al_unlock_mutex(thread_info[i].mutex);
/* al_destroy_thread() implicitly joins the thread, so this call is not
* strictly necessary.
*/
al_join_thread(thread[i], NULL);
al_destroy_thread(thread[i]);
}
al_destroy_event_queue(queue);
al_uninstall_timer(timer);
al_destroy_display(display);
return 0;
Error:
return 1;
}
