Exemplos de wait_queue_wakeup64_one_locked em C++ (Cpp)

Exemplo n.º 1

Arquivo: ipc_mqueue.c Projeto: Apple-FOSS-Mirror/xnu

/*
 *	Routine:	ipc_mqueue_release_msgcount
 *	Purpose:
 *		Release a message queue reference in the case where we
 *		found a waiter.
 *
 *	Conditions:
 *		The message queue is locked.
 *		The message corresponding to this reference is off the queue.
 */
void
ipc_mqueue_release_msgcount(
	ipc_mqueue_t mqueue)	
{
	assert(imq_held(mqueue));
	assert(mqueue->imq_msgcount > 1 || ipc_kmsg_queue_empty(&mqueue->imq_messages));

	mqueue->imq_msgcount--;

	if (!imq_full(mqueue) && mqueue->imq_fullwaiters) {
		if (wait_queue_wakeup64_one_locked(
						&mqueue->imq_wait_queue,
						IPC_MQUEUE_FULL,
						THREAD_AWAKENED,
						FALSE) != KERN_SUCCESS) {
			mqueue->imq_fullwaiters = FALSE;
		} else {
			/* gave away our slot - add reference back */
			mqueue->imq_msgcount++; 
		}
	}
}

Exemplo n.º 2

Arquivo: sync_sema.c Projeto: MACasuba/MACasuba-Utils-git

/*
 *	Routine:	semaphore_signal_internal
 *
 *		Signals the semaphore as direct.  
 *	Assumptions:
 *		Semaphore is locked.
 */
kern_return_t
semaphore_signal_internal(
	semaphore_t		semaphore,
	thread_t		thread,
	int				options)
{
	kern_return_t kr;
	spl_t  spl_level;

	spl_level = splsched();
	semaphore_lock(semaphore);

	if (!semaphore->active) {
		semaphore_unlock(semaphore);
		splx(spl_level);
		return KERN_TERMINATED;
	}

	if (thread != THREAD_NULL) {
		if (semaphore->count < 0) {
			kr = wait_queue_wakeup64_thread_locked(
			        	&semaphore->wait_queue,
					SEMAPHORE_EVENT,
					thread,
					THREAD_AWAKENED,
					TRUE);  /* unlock? */
		} else {
			semaphore_unlock(semaphore);
			kr = KERN_NOT_WAITING;
		}
		splx(spl_level);
		return kr;
	} 

	if (options & SEMAPHORE_SIGNAL_ALL) {
		int old_count = semaphore->count;

		if (old_count < 0) {
			semaphore->count = 0;  /* always reset */
			kr = wait_queue_wakeup64_all_locked(
					&semaphore->wait_queue,
					SEMAPHORE_EVENT,
					THREAD_AWAKENED,
					TRUE);		/* unlock? */
		} else {
			if (options & SEMAPHORE_SIGNAL_PREPOST)
				semaphore->count++;
			semaphore_unlock(semaphore);
			kr = KERN_SUCCESS;
		}
		splx(spl_level);
		return kr;
	}
	
	if (semaphore->count < 0) {
		if (wait_queue_wakeup64_one_locked(
					&semaphore->wait_queue,
					SEMAPHORE_EVENT,
					THREAD_AWAKENED,
					FALSE) == KERN_SUCCESS) {
			semaphore_unlock(semaphore);
			splx(spl_level);
			return KERN_SUCCESS;
		} else
			semaphore->count = 0;  /* all waiters gone */
	}

	if (options & SEMAPHORE_SIGNAL_PREPOST) {
		semaphore->count++;
	}

	semaphore_unlock(semaphore);
	splx(spl_level);
	return KERN_NOT_WAITING;
}