On Wed, May 6, 2009 at 11:22 AM, Sparta <theultimatespar...@gmail.com> wrote: > Hi Friends, > > I am working on cocoa MySQL application that connects to the MySQL > database and retrieves the records. > I run the search in a NSThread. I wish to cancel the search if needed, as > the searching of the desired data takes 15-20 minutes due to the bigger size > of database. > > Please suggest some method which can cancel / exit the NSThread from the > parent thread.
You can't. Thread cancellation is extremely dangerous. You might kill the thread while it's in the middle of holding an exclusive resource. That resource would then never be released, which could freeze up your entire application. As such, NSThread has no way to kill a thread. The best way to do this is to ask the thread to quit, and have the thread check periodically. NSThread on 10.5 has a built-in way to do this, the misleadingly-named -cancel and -isCancelled methods. Check -isCancelled every so often, and send -cancel when you want the thread to quit. You may have to redesign your code so that it can check -isCancelled frequently, though. Mike _______________________________________________ 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
