Jonathon, GCD is an object oriented API done in C. If you look at the man page entitled dispatch_object, you'll see that one can call dispatch_set_context() and dispatch_get_context() against any GCD object (sources and queues are where they make the most sense). In fact, if you're simply looking for a "goodbye kiss" when the last reference to a GCD object is dropped (via dispatch_retain() and dispatch_release()), then your code can install a finalizer via dispatch_set_finalizer_f(), which is passed the same context managed by the aforementioned API.
Have fun, davez On Jan 5, 2011, at 10:58 AM, Jonathon Kuo wrote: > When a GCD source gets cancelled, either via dispatch_source_cancel() or > because the source went away, I have no context other than the > dispatch_source_t source variable. How can I know for which source a source > cancel handler gets invoked? I have many simultaneous sources (sockets, > files, etc) and when a source cancel handler gets called I have no idea what > source it's for, so I can't do cleanup. Is dispatch_source_t queryable? Is > there a way to attach a userInfo object to it? Do I have to manage this > externally in a table myself?_______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/zarzycki%40apple.com > > This email sent to zarzy...@apple.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
