/// <summary>
/// Remove an item from one of the queues. Specifically, it removes the
/// oldest item from the next queue in order to provide fair access to
/// all of the queues
/// </summary>
public bool TryDequeue(out EntityUpdate value)
{
// If there is anything in immediate queues, return it first no
// matter what else. Breaks fairness. But very useful.
for (int iq = 0; iq < NumberOfImmediateQueues; iq++)
{
if (m_heaps[iq].Count > 0)
{
value = m_heaps[iq].RemoveNext();
return(m_lookupTable.TryRemove(value.Entity.LocalId, out value));
}
}
// To get the fair queing, we cycle through each of the
// queues when finding an element to dequeue.
// We pull (NumberOfQueues - QueueIndex) items from each queue in order
// to give lower numbered queues a higher priority and higher percentage
// of the bandwidth.
PriorityMinHeap curheap = m_heaps[m_nextQueue];
// Check for more items to be pulled from the current queue
if (m_countFromQueue > 0 && curheap.Count > 0)
{
--m_countFromQueue;
value = curheap.RemoveNext();
return(m_lookupTable.TryRemove(value.Entity.LocalId, out value));
}
// Find the next non-immediate queue with updates in it
for (int i = NumberOfImmediateQueues; i < NumberOfQueues; ++i)
{
m_nextQueue++;
if (m_nextQueue >= NumberOfQueues)
{
m_nextQueue = NumberOfImmediateQueues;
}
curheap = m_heaps[m_nextQueue];
if (curheap.Count == 0)
{
continue;
}
m_countFromQueue = m_queueCounts[m_nextQueue];
--m_countFromQueue;
value = curheap.RemoveNext();
return(m_lookupTable.TryRemove(value.Entity.LocalId, out value));
}
value = null;
return(false);
}
public PriorityQueue(int capacity)
{
capacity /= 4;
for (int i = 0; i < m_heaps.Length; ++i)
{
m_heaps[i] = new PriorityMinHeap(capacity);
}
m_lookupTable = new ConcurrentDictionary <uint, EntityUpdate>();
m_nextQueue = NumberOfImmediateQueues;
m_countFromQueue = m_queueCounts[m_nextQueue];
}
public bool TryOrderedDequeue(out EntityUpdate value)
{
for (int iq = 0; iq < NumberOfQueues; ++iq)
{
PriorityMinHeap curheap = m_heaps[iq];
if (curheap.Count > 0)
{
value = curheap.RemoveNext();
return(m_lookupTable.TryRemove(value.Entity.LocalId, out value));
}
}
value = null;
return(false);
}
