/**
* The callback for when the main thread has issued a command to the run loop
* thread. Reads all the pending commands and executes them
*/
static void command_callback(
CFFileDescriptorRef fdref,
CFOptionFlags callBackTypes,
void *context) {
int fd = CFFileDescriptorGetNativeDescriptor(fdref);
struct thread_env *thread_env = (struct thread_env *)context;
struct command *to_do = NULL;
struct command *to_free = NULL;
clear_pipe(fd);
do {
to_do = *(thread_env->commands);
} while (OSAtomicCompareAndSwapPtr(to_do, NULL, (void *)(thread_env->commands)) == false);
while (to_do != NULL) {
switch (to_do->type) {
case ADD_WATCH:
add_watch(to_do->arg, thread_env);
break;
case RM_WATCH:
// hh_server doesn't need this at the moment. Shouldn't be too hard to
// do...just need to map of paths to FSEvent streams.
fprintf(stderr, "fsevents impl doesn't support removing watches yet\n");
break;
}
to_free = to_do;
to_do = to_do->next;
free(to_free->arg);
free(to_free);
}
// For some reason you have to re-enable this callback every bloody time
CFFileDescriptorEnableCallBacks(fdref, kCFFileDescriptorReadCallBack);
}
/**
* Grabs the events that are ready to be processed from the linked list and
* clears the list
*/
static struct event *read_events(struct env *env) {
struct event *to_do = NULL;
clear_pipe(env->read_event_fd);
do {
to_do = *(env->events);
} while (OSAtomicCompareAndSwapPtr(to_do, NULL, (void *)(env->events)) == false);
return to_do;
}
void cmus_provide_next_track(void)
{
clear_pipe(cmus_next_track_request_fd, 1);
cmus_next_file_lock();
cmus_next_file = cmus_get_next_from_main_thread();
cmus_next_file_provided = 1;
cmus_next_file_unlock();
pthread_cond_broadcast(&cmus_next_file_cond);
}