/* The worker cycle */
static void *worker_thread_cycle(void *_async)
{
/* setup signal and thread's local-storage async variable. */
struct Async *async = _async;
char sig_buf;
/* pause for signal for as long as we're active. */
while (async->run && (read(async->pipe.in, &sig_buf, 1) >= 0)) {
perform_tasks(async);
sched_yield();
}
perform_tasks(async);
return 0;
}
/**
* \brief Waits for an Async object to finish up (joins all the threads
* in the thread pool) and DESTROYS the Async object (frees its
* memory and resources).
*
* This function will wait forever or until a signal is received and all
* the tasks in the queue have been processed.
*/
static void async_wait(async_p async)
{
if (!async) return;
/* wake threads (just in case) by sending `async->count`
* number of wakeups
*/
if (async->pipe.out)
write(async->pipe.out, async, async->count);
/* join threads */
for (int i = 0; i < async->count; i++) {
join_thread(async->threads[i]);
}
/* perform any pending tasks */
perform_tasks(async);
/* release queue memory and resources */
async_destroy(async);
}
