/// <summary>
/// Ctor - use for the first and unused latch to indicate completion.
/// </summary>
public NamedWindowConsumerLatchWait(NamedWindowConsumerLatchFactory factory)
: base(null, null)
{
_factory = factory;
_isCompleted = true;
_earlier = null;
}
/// <summary>
/// Called to indicate that the latch completed and a later latch can start.
/// </summary>
public override void Done()
{
_isCompleted = true;
if (_later != null)
{
lock (_later)
{
Monitor.Pulse(_later);
}
}
_earlier = null;
_later = null;
}
/// <summary>
/// Ctor.
/// </summary>
/// <param name="name">the factory name</param>
/// <param name="enabled"></param>
/// <param name="msecWait">the number of milliseconds latches will await maximually</param>
/// <param name="locking">the blocking strategy to employ</param>
/// <param name="timeSourceService">time source provider</param>
/// <param name="initializenow"></param>
public NamedWindowConsumerLatchFactory(string name, bool enabled, long msecWait, ConfigurationEngineDefaults.Threading.Locking locking, TimeSourceService timeSourceService, bool initializenow)
{
Name = name;
Enabled = enabled;
MsecWait = msecWait;
TimeSourceService = timeSourceService;
UseSpin = enabled && (locking == ConfigurationEngineDefaults.Threading.Locking.SPIN);
// construct a completed latch as an initial root latch
if (initializenow && UseSpin)
{
_currentLatchSpin = new NamedWindowConsumerLatchSpin(this);
}
else if (initializenow && enabled)
{
_currentLatchWait = new NamedWindowConsumerLatchWait(this);
}
}
/// <summary>
/// Returns a new latch.
/// <para />Need not be synchronized as there is one per statement and execution is during statement lock.
/// </summary>
/// <returns>latch</returns>
public NamedWindowConsumerLatch NewLatch(NamedWindowDeltaData delta, IDictionary <EPStatementAgentInstanceHandle, IList <NamedWindowConsumerView> > consumers)
{
if (_useSpin)
{
var nextLatch = new NamedWindowConsumerLatchSpin(delta, consumers, this, _currentLatchSpin);
_currentLatchSpin = nextLatch;
return(nextLatch);
}
else
{
if (_enabled)
{
var nextLatch = new NamedWindowConsumerLatchWait(delta, consumers, this, _currentLatchWait);
_currentLatchWait.Later = nextLatch;
_currentLatchWait = nextLatch;
return(nextLatch);
}
return(new NamedWindowConsumerLatchNone(delta, consumers));
}
}
/// <summary>
/// Ctor.
/// </summary>
/// <param name="earlier">the latch before this latch that this latch should be waiting for</param>
public NamedWindowConsumerLatchWait(NamedWindowDeltaData deltaData, IDictionary <EPStatementAgentInstanceHandle, IList <NamedWindowConsumerView> > dispatchTo, NamedWindowConsumerLatchFactory factory, NamedWindowConsumerLatchWait earlier)
: base(deltaData, dispatchTo)
{
_factory = factory;
_earlier = earlier;
}