/// <summary>
/// Posts a message to an agent and await a reply on the channel, synchronously.
/// </summary>
/// <param name="f">The lambda providing the message.</param>
/// <returns>The agents reply</returns>
public TReply PostAndReply(Func <AsyncReplyChannel <TReply>, TMessage> f)
{
var handle = new AsyncEventHandle <TReply>();
Post(f(new AsyncReplyChannel <TReply>(handle.Complete)));
handle.DoneEvent.WaitOne();
return(handle.Result());
}
/// <summary>
/// Starts a child computation. This allows multiple asynchronous computations to be executed simultaneously.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="m"></param>
/// <returns>A new computation that waits for the input computation to finish.</returns>
public static Async <Async <T> > StartChild <T>(this Async <T> m)
{
return(() =>
{
var handle = new AsyncEventHandle <T>();
m.StartAndReply(ch => new AsyncReplyChannel <T>(r =>
{
ch.Reply(r);
handle.Complete(r);
return Unit.Default;
}));
return () =>
{
handle.DoneEvent.WaitOne();
return handle.Result();
};
});
}
