/// <summary>
/// This is called by the worker thread when it finishes it's current job. It adds the worker thread back into the
/// queue of available threads.
/// </summary>
/// <param name="sender"> This should always be a reference to the GenericThread that has finished. </param>
/// <param name="e"> Nothing interesting in here. </param>
private void JobFinished(object sender, EventArgs e)
{
Debug.Assert(sender is GenericThread);
GenericThread gt = (GenericThread)sender;
// Add the thread back into the 'free' list.
int busyListCount;
lock (_threadBusyListLock)
{
bool c**k = _threadBusyList.Remove(gt);
Debug.Assert(c**k == true);
busyListCount = _threadBusyList.Count;
// If we're ending the last thread, the threads are now idle.
if (busyListCount == 0)
{
this.ThreadsAreIdle.Set();
}
// Keep this outside of any lock.
OnThreadBusyCountChangedEvent(busyListCount + 1, busyListCount);
}
// This is a ThreadSafe queue so we don't need to lock before Enqueueing.
_threadAvailableList.Enqueue(gt);
}
/// <summary>
/// If the job queue is not empty and there is an available worker thread then the next job is sent to the worker thread.
/// </summary>
private void PokeTheQueue()
{
if (_bSuspendQueue == false)
{
int oldQueueSize, newQueueSize;
lock (_jobQueue)
{
oldQueueSize = _jobQueue.Count;
if (_jobQueue.Count > 0)
{
lock (_threadAvailableList)
{
// Use a 'while' rather than an 'if' because although this function is called each time a job is queued
// and each time a worker thread becomes available and there therefore the worker threads should always
// be saturated, if the queue is suspended then jobs aren't picked out of the queue when threads become available.
while (_threadAvailableList.Count > 0 && _jobQueue.Count > 0)
{
GenericThread genericThread = _threadAvailableList.Dequeue();
lock (_threadBusyList)
{
_threadBusyList.Add(genericThread);
}
Job nextJob = _jobQueue.Dequeue().WrappedJob;
//Debug.WriteLine("Starting Job named '"+nextJob.Name+"'. Queue Size: " + _jobQueue.Count);
genericThread.StartJob(nextJob);
}
}
}
newQueueSize = _jobQueue.Count;
}
if (oldQueueSize != newQueueSize) // Keep this outside of the lock.
{
OnThreadManagerQueueSizeChangedEvent(_jobQueue.Count + 1, _jobQueue.Count);
}
}
}