Timer

static void * timer_routine(void * args) {
	while (!timer_stop) {
		printf("Time slot %3lu\n", current_time());
		usleep(100000);
		int fsh = 0;
		int event = 0;
		/* Wait for all devices have done the job in current
		 * time slot */
		struct timer_id_container_t * temp;
		for (temp = dev_list; temp != NULL; temp = temp->next) {
			pthread_mutex_lock(&temp->id.event_lock);
			while (!temp->id.done && !temp->id.fsh) {
				pthread_cond_wait(
					&temp->id.event_cond,
					&temp->id.event_lock
				);
			}
			if (temp->id.fsh) {
				fsh++;
			}
			event++;
			pthread_mutex_unlock(&temp->id.event_lock);
		}

		/* Increase the time slot */
		_time++;
		
		/* Let devices continue their job */
		for (temp = dev_list; temp != NULL; temp = temp->next) {
			pthread_mutex_lock(&temp->id.timer_lock);
			temp->id.done = 0;
			pthread_cond_signal(&temp->id.timer_cond);
			pthread_mutex_unlock(&temp->id.timer_lock);
		}
		if (fsh == event) {
			break;
		}
	}
	pthread_exit(args);
}

void next_slot(struct timer_id_t * timer_id) {
	/* Tell to timer that we have done our job in current slot */
	pthread_mutex_lock(&timer_id->event_lock);
	timer_id->done = 1;
	pthread_cond_signal(&timer_id->event_cond);
	pthread_mutex_unlock(&timer_id->event_lock);

	/* Wait for going to next slot */
	pthread_mutex_lock(&timer_id->timer_lock);
	while (timer_id->done) {
		pthread_cond_wait(
			&timer_id->timer_cond,
			&timer_id->timer_lock
		);
	}
	pthread_mutex_unlock(&timer_id->timer_lock);
}