/// <summary> This method (implemented from MgBlockingQueue) offers the blocking mechanism. Any thread entering in
/// this method will wait if the queue is empty and it will be notified when an element is inserted in the
/// queue
/// </summary>
public void waitForElement()
{
Monitor.Enter(this);
try
{
// we finished handling of previous events, and there is no other events in queue
// the sequence is finished
if (_queue.Size == 0)
{
_timeFirstEvent = 0;
}
while (_queue.Size == 0)
{
Monitor.Wait(this);
}
}
catch (ThreadInterruptedException)
{
Monitor.Pulse(this); // propagate to non-interrupted thread
throw new ApplicationException("In waitForElement");
}
finally
{
Monitor.Exit(this);
}
}
/// <summary> Inserts the specified element into the priority queue.The inserting of element is done in
/// synchronization When the element is inserted successfully then it notifies the waiting thread
/// </summary>
/// <param name="o">the element to add </param>
/// <returns> true </returns>
public bool offer(Object o)
{
if (o == null)
{
throw new NullReferenceException();
}
Monitor.Enter(this);
try
{
bool ok = _queue.offer(o);
if (_timeFirstEvent == 0)
// adding first event in sequence
{
// background event doesn't count
if (!isBackgroundEvent(o))
{
_timeFirstEvent = Misc.getSystemMilliseconds();
}
}
Debug.Assert(ok);
Monitor.Pulse(this);
return(true);
}
finally
{
Monitor.Exit(this);
}
}