//
// this method runs in another thread,
// picking off the next thread item to run off the queue
// until manager tells us to stop
//
public void Run()
{
//Helper.MtWriteLine( "ThreadPoolThread [{0}] - entered run().", _ID ) ;
while (true)
{
if (_tpm.IsShutdown)
{
//Helper.MtWriteLine( "ThreadPoolThread [{0}] - shutdown - exited run().", _ID ) ;
break; // synced internally - quick exit if manager says enough is enough
}
using (MyThreadPoolItemBase tpi = _tpm.NextThreadPoolItem()) // synced internally - get next item off the queue ;
{
if (tpi == null)
{
ST.Thread.Sleep(100); // sleep 1/10 second - try again
continue;
}
//Helper.WriteLine( "ThreadPoolThread [{0}] - start run - item [{1}].", _ID, tpi.ID ) ;
try
{
tpi.Run(); // found something to run -run thread pool item's code
}
catch (Exception ex) // cant let exceptions escape - or else thread will die
{
Helper.MtWriteLine("ThreadPoolThread [{0}], item [{1}] - EXCEPTION:\n\t{2}\n\t\t{3}",
_ID, tpi.ID, ex.Message, ex.StackTrace);
}
tpi.IsFinished = true; // synced - this tpi now marked for deletion
//Helper.WriteLine( "ThreadPoolThread [{0}] - end run - item [{1}].", _ID, tpi.ID ) ;
}
}
//Helper.MtWriteLine( "ThreadPoolThread [{0}] - exited run().", _ID ) ;
}
//
// called from main thread
//
public void Queue(MyThreadPoolItemBase tpi)
{
if (this.IsShutdown)
{
Helper.MtWriteLine("Thread pool is shutting down. Can't queue new item [{0}] that will never be run, dude.", tpi.ID);
return;
}
if (tpi.IsStarted)
{
throw new Exception("ThreadPoolItem #" + tpi.ID + " has already been started. Create a new one.");
}
this.ThrottleThreadPool(); // wait for thread count to be less than maximum unstarted + running queue length
tpi.IsFinished = false;
tpi.ThreadPoolManager = this;
lock ( _lock )
{
_tpiQueue.Add(tpi);
}
}