/// <summary>
/// Given a non-void call descriptor, calls it and retrieves the return value.
/// </summary>
/// <param name="callDescriptor"></param>
/// <returns></returns>
private object GetReplyForCallDescriptor(LocalCallDescriptor callDescriptor)
{
// ReplyFromParentArrived is a TLS field, so initialize it if it's empty
if (replyFromParentArrived == null)
{
replyFromParentArrived = new ManualResetEvent(false);
}
replyFromParentArrived.Reset();
int requestingCallNumber = callDescriptor.CallNumber;
ReplyData replyData = new ReplyData();
replyData.waitEvent = replyFromParentArrived;
// Register our wait event for the call id
lock (repliesFromParent)
{
repliesFromParent[requestingCallNumber] = replyData;
}
nodeCommandQueue.Enqueue(callDescriptor);
replyFromParentArrived.WaitOne();
LocalCallDescriptor reply = null;
// Unregister the wait event
lock (repliesFromParent)
{
// Get the reply
reply = replyData.reply;
ErrorUtilities.VerifyThrow(reply != null, "We must have a reply if the wait event was set");
repliesFromParent.Remove(requestingCallNumber);
}
return(reply.GetReplyData());
}
