/// <summary>
/// <para>
/// Polls for events using the given handler.
/// </para>
/// <para>
/// This poller will continue to feed events to the given handler until known available
/// events are consumed or <see cref="EventPoller.Handler{T}"/> returns false.
/// </para>
/// <para>
/// Note that it is possible for more events to become available while the current events
/// are being processed. A further call to this method will process such events.
/// </para>
/// </summary>
public EventPoller.PollState Poll(EventPoller.Handler <T> eventHandler)
{
var currentSequence = _sequence.Value;
var nextSequence = currentSequence + 1;
var availableSequence = _sequencer.GetHighestPublishedSequence(nextSequence, _dependentSequences.Value);
if (nextSequence <= availableSequence)
{
var processedSequence = currentSequence;
try
{
bool processNextEvent;
do
{
var evt = _dataProvider[nextSequence];
processNextEvent = eventHandler(evt, nextSequence, nextSequence == availableSequence);
processedSequence = nextSequence;
nextSequence++;
}while (nextSequence <= availableSequence & processNextEvent);
}
finally
{
_sequence.SetValue(processedSequence);
}
return(EventPoller.PollState.Processing);
}
if (_sequencer.Cursor >= nextSequence)
{
return(EventPoller.PollState.Gating);
}
return(EventPoller.PollState.Idle);
}
public PollRunnable(EventPoller <PerfEvent> poller)
{
_poller = poller;
_eventHandler = OnEvent;
}
