Re: Threading!
Re: Threading!
- Subject: Re: Threading!
- From: Chris Purcell <email@hidden>
- Date: Wed, 20 Mar 2002 00:32:38 +0000
I _believe_ the word you are looking for is "oneway", as in
- (oneway void)myMethod;
Look it up in Apple's book on Cocoa:
http://developer.apple.com/techpubs/macosx/Cocoa/ObjectiveC/4MoreObjC/Remote_Messaging.
html
and search for the word "oneway"
Kritter out
There are clearly still huge gaps in my understanding of how threading
works in Cocoa.
In my app, I have set up almost exactly what is described here:
http://developer.apple.com/techpubs/macosx/Cocoa/TasksAndConcepts/ProgrammingTopics/
Multithreading/Tasks/connections.html
There's a main thread for handling the GUI, and a worker thread sitting
in a runloop. I can call methods in both directions, it all works fine.
But when the main thread calls a method on the worker thread via the
NSConnection, it _waits_ for it to return, which defeats the whole
purpose of threading in the first place. What's the point of detaching
a thread if it runs synchronously?
Specifically, here's what I'm trying to accomplish...
- A main thread, servicing the GUI
- One or more child threads, each managing a single network connection
using blocking socket calls.
For example, imagine a document-based app where each document window has
a persistent network connection associated with it. I want the document
(in the main thread) to tell its associated child network thread to
connect to some host. I DON'T want the main thread to block waiting for
the socket connection to finish, I just want a message back later from
the child thread that it either connected or it didn't.
Furthermore, if the user indicates they want to abort the connection, I
need a way to communicate that to the thread.
I can't just use plain NSThreads and NSNotifications, because this is
not thread safe. So, I switched to NSConnection, which has given me
thread-safe message passing, but blocks until the remote call
completes. So, now I don't know what to do.
There must be someone out there that knows how to do this correctly.
Thank you,
Steven
_______________________________________________
cocoa-dev mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/cocoa-dev
Do not post admin requests to the list. They will be ignored.