public IAsyncResult BeginAsync(AsyncCallback callback, object state)
{
if (_waitHandle != null)
{
throw new InvalidOperationException("The asynchronous request was already started.");
}
_state = state;
lock (_completionCallbacks)
_completionCallbacks.Add(callback);
WaitOrTimerCallback timerCallback = (s, timeoutExpired) =>
{
if (timeoutExpired)
{
lock (_completionCallbacks)
_completionCallbacks.Add(asyncResult => _timeoutCallback());
Fail(RequestTimeoutException.FromCorrelationId(_requestId));
}
};
_waitHandle = ThreadPool.RegisterWaitForSingleObject(CompleteEvent, timerCallback, state, _timeout, true);
return(this);
}
public bool Wait()
{
bool alreadyCompleted;
lock (_lock)
alreadyCompleted = _completed;
bool result = alreadyCompleted || CompleteEvent.WaitOne(_timeout == TimeSpan.MaxValue ? Int32.MaxValue : (int)_timeout.TotalMilliseconds, true);
if (!result)
{
Fail(RequestTimeoutException.FromCorrelationId(_requestId));
}
Close();
if (_exception != null)
{
throw _exception;
}
return(result);
}