public void InsertWorkItem(ThreadPoolWorkItem oWorkItem)
{
try
{
// Lock this object
Monitor.Enter(this);
// Add the work item to the queue
queueInput.Enqueue(oWorkItem);
if (isRunning &&
(queueInput.Count > hashThreads.Count) &&
(hashThreads.Count < maxThreadCount))
{
// Create a thread to handle the new work item
Thread th = new Thread(new System.Threading.ThreadStart(ThreadProc));
// Generate a thread name
th.Name = Guid.NewGuid().ToString();
// Add the thread to the pool
hashThreads.Add(th.Name, th);
// Start the thread
th.Start();
}
}
catch (Exception oBug)
{
// Store the exception
lastException = oBug;
}
finally
{
// Unlock this obkect
Monitor.Exit(this);
}
}
// Default exception handler, can be overriden
private void OnThreadError(ThreadPoolWorkItem oWorkItem, Exception oError)
{
if (oWorkItem == null)
{
lastException = oError;
}
else
{
oWorkItem.lastException = oError;
}
}
private void ThreadProc()
{
// While we're runing
while (isRunning)
{
object obj = null;
// Lock this object
Monitor.Enter(this);
// See if there's something in the queue
if (queueInput.Count > 0)
{
// Get work item out of the queue
obj = queueInput.Dequeue();
}
// Unlock this object
Monitor.Exit(this);
// Do we have a work item
if (obj == null)
{
// Nothing to do
bool bQuit = false;
// Lock this object
Monitor.Enter(this);
// If we're running above the min thread count, remove the thread
if (hashThreads.Count > minThreadCount)
{
// Remove the thread from the pool
hashThreads.Remove(Thread.CurrentThread.Name);
// Quit thread loop
bQuit = true;
}
// Unlock this object
Monitor.Exit(this);
// See if we're done
if (bQuit)
{
// Done
return;
}
}
else
{
// We have an item of work to do
ThreadPoolWorkItem oWorkItem = (ThreadPoolWorkItem)obj;
try
{
// Execute the method on the work item
oWorkItem.objOutput = oWorkItem.delegateToCall(oWorkItem.objInput);
}
catch (Exception ex)
{
// See if we have an exception delegate to call
if (ThreadError != null)
{
// Call the thread delegate, this may throw an exception by design
ThreadError(oWorkItem, ex);
}
}
if (oWorkItem.storeOutput)
{
// Lock this object
Monitor.Enter(queueOutput);
// Add the competed item to the output queue
queueOutput.Enqueue(oWorkItem);
// Unlock this object
Monitor.Exit(queueOutput);
}
}
// Don't run again for server pause seconds
Thread.Sleep((int)(1000 * serverPauseSeconds));
}
}
