public override void Run()
{
Debug.Assert(_backgroundThread == null, "A thread is already running " + _backgroundThread);
_backgroundThread = Thread.CurrentThread;
_startupLatch.release();
try
{
do
{
AsyncEvent events = _stackUpdater.getAndSet(this, _endSentinel);
Process(events);
if (_stack == _endSentinel && !_shutdown)
{
LockSupport.park(this);
}
} while (!_shutdown);
AsyncEvent events = _stackUpdater.getAndSet(this, _shutdownSentinel);
Process(events);
}
finally
{
_backgroundThread = null;
_shutdownLatch.release();
}
}
/// <summary>
/// Construct a new {@code AsyncEvents} instance, that will use the given consumer to process the events.
/// </summary>
/// <param name="eventConsumer"> The <seealso cref="Consumer"/> used for processing the events that are sent in. </param>
public AsyncEvents(System.Action <T> eventConsumer, Monitor monitor)
{
this._eventConsumer = eventConsumer;
this._monitor = monitor;
this._startupLatch = new BinaryLatch();
this._shutdownLatch = new BinaryLatch();
this._stack = _endSentinel;
}
private void Process(AsyncEvent events)
{
events = ReverseAndStripEndMark(events);
while (events != null)
{
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @SuppressWarnings("unchecked") T event = (T) events;
T @event = ( T )events;
_eventConsumer.accept(@event);
events = events.Next;
}
}
public override void Send(T @event)
{
AsyncEvent prev = _stackUpdater.getAndSet(this, @event);
Debug.Assert(prev != null);
@event.Next = prev;
if (prev == _endSentinel)
{
LockSupport.unpark(_backgroundThread);
}
else if (prev == _shutdownSentinel)
{
AsyncEvent events = _stackUpdater.getAndSet(this, _shutdownSentinel);
Process(events);
}
}
private AsyncEvent ReverseAndStripEndMark(AsyncEvent events)
{
AsyncEvent result = null;
long count = 0;
while (events != _endSentinel && events != _shutdownSentinel)
{
AsyncEvent next;
do
{
next = events.Next;
} while (next == null);
events.Next = result;
result = events;
events = next;
count++;
}
if (count > 0)
{
_monitor.eventCount(count);
}
return(result);
}
