// Start the async thread, or perform the operation synchronously.
public void Start()
{
if (Thread.CanStartThreads())
{
ThreadPool.QueueCompletionItem
(new WaitCallback(Run), null);
}
else
{
completedSynchronously = true;
Run(null);
}
}
// Construct a new asynchronous result object and begin invocation.
internal AsyncResult(Delegate del, Object[] args,
AsyncCallback callback, Object state)
{
// Initialize the fields within this class.
this.del = del;
this.args = args;
this.callback = callback;
this.state = state;
this.result = null;
this.resultException = null;
this.synchronous = false;
this.completed = false;
this.endInvokeCalled = false;
// If we have threads, then queue the delegate to run
// on the thread pool's completion worker thread.
if (Thread.CanStartThreads())
{
ThreadPool.QueueCompletionItem
(new WaitCallback(Run), null);
return;
}
// We don't have threads, so call the delegate synchronously.
this.synchronous = true;
try
{
this.result = del.DynamicInvoke(args);
}
catch (Exception e)
{
this.resultException = e;
}
this.completed = true;
if (callback != null)
{
callback(this);
}
}
