// Must be called with HandlesLock held.
// This process the top-level InProgressHandles queue, demuxing entries into the per-instance queues and completing markers.
void ProcessInProgressHandles(ref List <InstanceHandleReference> handlesPendingResolution)
{
while (InProgressHandles.Count > 0)
{
InstanceHandleReference handleRef = InProgressHandles.Peek();
if (handleRef.InstanceHandle != null)
{
if (handleRef.InstanceHandle.Id == Guid.Empty)
{
break;
}
Queue <InstanceHandleReference> acceptingQueue;
if (!InProgressHandlesPerInstance.TryGetValue(handleRef.InstanceHandle.Id, out acceptingQueue))
{
if (CheckOldestReference(handleRef, ref handlesPendingResolution))
{
acceptingQueue = new Queue <InstanceHandleReference>(2);
acceptingQueue.Enqueue(handleRef);
InProgressHandlesPerInstance.Add(handleRef.InstanceHandle.Id, acceptingQueue);
}
}
else
{
// It's ok to enqueue first, then dequeue, to err on the side of duplicates. Duplicates do not cause a problem.
acceptingQueue.Enqueue(handleRef);
}
}
InProgressHandles.Dequeue();
}
}
// Must be called with HandlesLock held.
private void EnqueueReference(InstanceHandleReference handleRef)
{
if (InProgressHandles.Count > 0)
{
InProgressHandles.Enqueue(handleRef);
}
else if (handleRef.InstanceHandle.Id != Guid.Empty)
{
if (!InProgressHandlesPerInstance.TryGetValue(handleRef.InstanceHandle.Id, out Queue <InstanceHandleReference> queue))
{
queue = new Queue <InstanceHandleReference>(2);
InProgressHandlesPerInstance.Add(handleRef.InstanceHandle.Id, queue);
}
queue.Enqueue(handleRef);
}
else
{
InProgressHandles.Enqueue(handleRef);
}
}
