Function GetResQueueFromLock

src/backend/utils/resscheduler/resqueue.c:1101–1114

* GetResQueueFromLock -- find the resource queue for a given lock; * * Notes: * should be handed a locktag containing a valid queue id. * should hold the resource queue lightweight lock during this operation */

 *	should hold the resource queue lightweight lock during this operation
 */
ResQueue
GetResQueueFromLock(LOCK *lock)
{
	Assert(LWLockHeldByMe(ResQueueLock));

	ResQueue	queue = ResQueueHashFind(GET_RESOURCE_QUEUEID_FOR_LOCK(lock));

	if (queue == NULL)
	{
		elog(ERROR, "cannot find queue id %d", GET_RESOURCE_QUEUEID_FOR_LOCK(lock));
	}

	return queue;
}

/*
 * ResGrantLock -- grant a resource lock.