private void HandleProcessExit()
{
// The process lock may already be held by this thread since the
// Process object can call its Exited event handler as a side effect of
// several operations on the Process object. This could result in a
// deadlock if the task's Terminated event waits on some other thread that
// is also blocked on the process. So we make it asynchronous instead.
// Join then blocks on the exitedEvent to restore the required synchronization.
if (Interlocked.Exchange(ref exited, 1) == 0)
{
ThreadPool.QueueUserWorkItem((state) =>
{
try
{
WaitForConsoleToBeCompletelyReadOnceProcessHasExited();
NotifyTerminated(TaskResult <object> .CreateFromValue(ExitCode));
}
finally
{
exitedEvent.Set();
}
}, null);
}
}
private void Run()
{
try
{
try
{
try
{
BeforeTask();
ThreadAbortException ex = threadAbortScope.Run(invoker.Invoke);
if (ex != null)
{
NotifyTerminated(TaskResult <object> .CreateFromException(ex));
}
else
{
NotifyTerminated(TaskResult <object> .CreateFromValue(invoker.Result));
}
}
finally
{
AfterTask();
}
}
catch (Exception ex)
{
NotifyTerminated(TaskResult <object> .CreateFromException(ex));
}
}
catch (Exception ex)
{
UnhandledExceptionPolicy.Report("An unhandled exception occurred in a thread task.", ex);
}
}
/// <summary>
/// Dispatches notification that the task has terminated and provides its result.
/// </summary>
/// <param name="result">The task result.</param>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="result"/> is null.</exception>
/// <exception cref="InvalidOperationException">Thrown if the task is not currently running.</exception>
protected void NotifyTerminated(TaskResult result)
{
if (result == null)
throw new ArgumentNullException("result");
lock (sequenceLock)
{
if (!IsRunning)
throw new InvalidOperationException("The task is not currently running.");
this.result = result;
OnTerminated();
}
}