/// <summary>
/// Starts the manager/workers execution.
/// If the execution has been started it has no effect.
/// </summary>
/// <param name="managerData">The data to be used by the manager thread during its execution</param>
public void Start(TManagerData managerData)
{
Monitor.Enter(oLock);
if (running)
{
Monitor.PulseAll(oLock);
Monitor.Exit(oLock);
return;
}
this.running = true;
this.abortRequested = false;
this.cancelRequested = false;
this.SetupLists();
this.workFinished.Reset();
this.lastExecutionStatus = MWExecutionStatus.ExecutionInProgress;
this.lastExecutionResult = default(TManagerResult);
this.managerThread = new Thread(managerThreadTask);
this.managerThread.IsBackground = this.runInBackground;
this.managerThread.Start(managerData);
Monitor.PulseAll(oLock);
Monitor.Exit(oLock);
}
/// <summary>
/// Initializes a new instance of ManagerWorkers class
/// </summary>
/// <param name="numWorkers">Number of workers to use</param>
public ManagerWorkers(int numWorkers)
{
this.abortRequested = true;
this.NumWorkers = numWorkers;
this.running = false;
this.runInBackground = true;
this.abortRequested = false;
this.oLock = new Object();
this.workersLock = new ReaderWriterLock();
this.allWorkersFree = new ManualResetEvent(true);
this.availiableWorker = new ManualResetEvent(true);
this.workFinished = new ManualResetEvent(false);
this.managerThreadTask = new ParameterizedThreadStart(this.ManagerThreadTask);
this.lastExecutionStatus = MWExecutionStatus.Unknown;
this.lastExecutionResult = default(TManagerResult);
}
/// <summary>
/// Performs the manager task by calling the ManagerTask method.
/// When it completes, enqueues the worker in the Owner.idleWorkers queue.
/// </summary>
/// <param name="o">Object that contains the task data to be used by the manager thread</param>
private void ManagerThreadTask(object o)
{
TManagerResult executionResult;
if (!(o is TManagerData))
{
OnExecutionAborted();
return;
}
try
{
OnExecutionStarted();
executionResult = ManagerTask((TManagerData)o);
if (cancelRequested)
{
this.lastExecutionStatus = MWExecutionStatus.ExecutionCanceled;
}
else
{
this.lastExecutionStatus = MWExecutionStatus.ExecutionCompleted;
}
OnExecutionCompleted();
}
catch (ThreadAbortException)
{
// Rise the ExecutionAborted event and ensure the finally block will be executed
this.OnExecutionAborted();
this.lastExecutionResult = default(TManagerResult);
this.lastExecutionStatus = MWExecutionStatus.ExecutionAborted;
}
finally
{
this.workersLock.AcquireWriterLock(-1);
Thread.BeginCriticalRegion();
this.idleWorkers.Clear();
this.busyWorkers.Clear();
this.availiableWorker.Set();
this.allWorkersFree.Set();
this.workersLock.ReleaseWriterLock();
Thread.EndCriticalRegion();
this.workFinished.Set();
this.running = false;
}
}
