C++ (Cpp) CF_Q_PRI_EMPTYの例

コード例 #1

ファイル: cf_queue.c プロジェクト: benjolitz/aerospike-client-c

int cf_queue_priority_pop(cf_queue_priority *q, void *buf, int ms_wait) {
	QUEUE_LOCK(q);

	struct timespec tp;
	if (ms_wait > 0) {
		clock_gettime( CLOCK_REALTIME, &tp); 
		tp.tv_sec += ms_wait / 1000;
		tp.tv_nsec += (ms_wait % 1000) * 1000000;
		if (tp.tv_nsec > 1000000000) {
			tp.tv_nsec -= 1000000000;
			tp.tv_sec++;
		}
	}

	if (q->threadsafe) {
#ifdef EXTERNAL_LOCKS
		if (CF_Q_PRI_EMPTY(q)) {
			QUEUE_UNLOCK(q);
			return -1;
		}
#else
		while (CF_Q_PRI_EMPTY(q)) {
			if (CF_QUEUE_FOREVER == ms_wait) {
				pthread_cond_wait(&q->CV, &q->LOCK);
			}
			else if (CF_QUEUE_NOWAIT == ms_wait) {
				pthread_mutex_unlock(&q->LOCK);
				return(CF_QUEUE_EMPTY);
			}
			else {
				pthread_cond_timedwait(&q->CV, &q->LOCK, &tp);
				if (CF_Q_PRI_EMPTY(q)) {
					pthread_mutex_unlock(&q->LOCK);
					return(CF_QUEUE_EMPTY);
				}
			}
		}
#endif //EXERNAL_LOCKS
	}
	
	int rv;
	if (CF_Q_SZ(q->high_q))
		rv = cf_queue_pop(q->high_q, buf, 0);
	else if (CF_Q_SZ(q->medium_q))
		rv = cf_queue_pop(q->medium_q, buf, 0);
	else if (CF_Q_SZ(q->low_q))
		rv = cf_queue_pop(q->low_q, buf, 0);
	else rv = CF_QUEUE_EMPTY;
		
	QUEUE_UNLOCK(q);

		
	return(rv);
}

コード例 #2

ファイル: cf_queue_priority.c プロジェクト: aerospike/aerospike-common

int cf_queue_priority_pop(cf_queue_priority *q, void *buf, int ms_wait)
{
	cf_queue_priority_lock(q);

	struct timespec tp;

	if (ms_wait > 0) {
		cf_set_wait_timespec(ms_wait, &tp);
	}

	if (q->threadsafe) {
		while (CF_Q_PRI_EMPTY(q)) {
			if (CF_QUEUE_FOREVER == ms_wait) {
				pthread_cond_wait(&q->CV, &q->LOCK);
			}
			else if (CF_QUEUE_NOWAIT == ms_wait) {
				pthread_mutex_unlock(&q->LOCK);
				return CF_QUEUE_EMPTY;
			}
			else {
				pthread_cond_timedwait(&q->CV, &q->LOCK, &tp);

				if (CF_Q_PRI_EMPTY(q)) {
					pthread_mutex_unlock(&q->LOCK);
					return CF_QUEUE_EMPTY;
				}
			}
		}
	}

	int rv = CF_QUEUE_EMPTY;

	if (CF_Q_SZ(q->high_q)) {
		rv = cf_queue_pop(q->high_q, buf, 0);
	}
	else if (CF_Q_SZ(q->medium_q)) {
		rv = cf_queue_pop(q->medium_q, buf, 0);
	}
	else if (CF_Q_SZ(q->low_q)) {
		rv = cf_queue_pop(q->low_q, buf, 0);
	}

	cf_queue_priority_unlock(q);
	return rv;
}