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Removing Items from the Queue
Listing 4 shows the code for removing items from the queue.
Listing 4 Removing Queue Items
const QueueElementPtr NMSServiceQueue::remove(void)
{
QueueElementPtr tempQueueItem;
QueueElementPtr nextQueueItem;
if (queueIsEmpty())
{
return NULL;
}
else
{
tempQueueItem = startOfQueue;
nextQueueItem = startOfQueue->nextQueueElement;
if (nextQueueItem != NULL)
startOfQueue->nextQueueElement = nextQueueItem;
startOfQueue = tempQueueItem->nextQueueElement;
return tempQueueItem;
}
}
As for Listing 3, Listing 4 updates the two variables startOfQueue and endOfQueue in conjunction with items being removed from the queue.