internal IAsyncResult BeginShutDown(AsyncCallback userCallback, object state)
{
ShutDownAsyncResult ar = new ShutDownAsyncResult(this, userCallback, state);
bool firstTime = false;
lock (_syncRoot)
{
if (_state < MusicOnHoldServerState.Terminating)
{
firstTime = true;
this.UpdateState(MusicOnHoldServerState.Terminating);
}
else if (_state == MusicOnHoldServerState.Terminating)
{
_listOfShutDownAsyncResults.Add(ar);
}
else if (_state == MusicOnHoldServerState.Terminated)
{
ar.SetAsCompleted(null, true);
}
}
if (firstTime)
{
ThreadPool.QueueUserWorkItem((waitState) =>
{
var tempAr = waitState as ShutDownAsyncResult;
tempAr.Process();
}, ar);
}
return(ar);
}
internal void EndShutDown(IAsyncResult ar)
{
ShutDownAsyncResult result = ar as ShutDownAsyncResult;
result.EndInvoke();
}
