protected override void OnEnqueueItem(AsyncQueueItemBase item, AsyncQueuePriority priority, string itemKey)
{
_queue.Enqueue(item);
}
protected virtual void OnEnqueueItem(AsyncQueueItemBase item, AsyncQueuePriority priority, string itemKey)
{
throw new NotImplementedException();
}
protected override void OnEnqueueItem(AsyncQueueItemBase item, AsyncQueuePriority priority, string itemKey)
{
_priorityStack[(int)priority][itemKey] = item;
}
private void DequeueItems(object notUsed)
{
if (Interlocked.Decrement(ref _enqueueThreads) > 0)
{
// another thread following - exit
return;
}
bool checkDone;
long threadCount;
do
{
checkDone = false;
threadCount = Interlocked.Increment(ref _dequeueThreads);
try
{
if (threadCount == 1)
{
// we are the dequeue thread - dequeue all items
checkDone = true;
//new
AcquireLock();
try
{
var queueLength = OnGetQueueLength();
while (queueLength > 0)
{
AsyncQueueItemBase item = OnDequeueItem();
ReleaseLock();
try
{
if (item != null)
{
// process item
// - or discard it if closed
if (!_closed)
{
try
{
item.CallUserCallback();
}
catch (Exception e)
{
if (_logger != null)
{
_logger.Log(e);
}
else
{
Debug.WriteLine("AsyncQueueBase: " + e);
}
}
}
}
}
finally
{
AcquireLock();
}
// next
queueLength = OnGetQueueLength();
}
}
finally
{
ReleaseLock();
}
}
}
finally
{
threadCount = Interlocked.Decrement(ref _dequeueThreads);
}
} while ((threadCount == 0) && (!checkDone));
}