/// <summary>
/// Clear a type of command in work queue
/// </summary>
public void Clear(WorkQueueElement.Command commandType)
{
lock (m_queue)
{
Queue<WorkQueueElement> tempQueue = new Queue<WorkQueueElement>();
while (m_queue.Count > 0)
{
WorkQueueElement elem = m_queue.Dequeue();
if (elem.CommandToPerform == commandType)
{
HLSTrace.WriteLine("Clear command {0}", elem.CommandToPerform.ToString());
}
else
{
tempQueue.Enqueue(elem);
}
}
while (tempQueue.Count > 0)
{
m_queue.Enqueue(tempQueue.Dequeue());
}
if (m_queue.Count == 0)
{
m_queueHasItemsEvent.Reset();
}
}
}
/// <summary>
/// Clear the queue and add 1 item in the same operation. This is useful
/// for operation that take precedence over all others (like closing and errors)
/// </summary>
/// <param name="elem">New item to add</param>
public void ClearAndEnqueue(WorkQueueElement elem)
{
lock (m_queue)
{
m_queue.Clear();
m_queue.Enqueue(elem);
m_queueHasItemsEvent.Set();
}
}
/// <summary>
/// Enqueue a new work item
/// </summary>
/// <param name="elem">the item to add</param>
public void Enqueue(WorkQueueElement elem)
{
lock (m_queue)
{
m_queue.Enqueue(elem);
if (1 == m_queue.Count)
{
m_queueHasItemsEvent.Set();
}
}
}