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POObjective-C Threading: Exiting a thread, retain problems
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  1. POObjective-C Threading: Exiting a thread, retain problems
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    copied!<p>I'm trying to create a thread that configures a run loop to run a physics engine through a defined NSTimer. However, I'm having trouble making the thread exit normally (or I think the problem is).</p> <p>Attached are the relevant portions of my code:</p> <p>(This code is in a view controller) (back is called when a button is pressed)</p> <pre><code>- (void)back { [timestep invalidate]; exiting = YES; [self release]; } - (void)initializePhysicsWorld { // Initializes the thread to simulate physics interactions. [NSThread detachNewThreadSelector:@selector(physicsThreadMethod) toTarget:self withObject:nil]; } - (void)physicsThreadMethod { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSRunLoop *myRunLoop = [NSRunLoop currentRunLoop]; timestep = [NSTimer timerWithTimeInterval:1.0f/60.0f target:self selector:@selector(step:) userInfo:nil repeats:YES]; [myRunLoop addTimer:timestep forMode:NSDefaultRunLoopMode]; while (!exiting) { CFRunLoopRun(); [pool release]; pool = [[NSAutoreleasePool alloc] init]; // periodically refreshes pool } CFRunLoopStop([myRunLoop getCFRunLoop]); NSLog(@"Thread is going to exit"); [pool release]; } - (void)dealloc { if ([self.view superview]) { [self.view removeFromSuperview]; } [super dealloc]; } </code></pre> <p>The engine (the step: function) runs fine, but when I try to exit the loop by running the method back, it would appear that the thread does not release its retain on my view controller (dealloc is not called). I think my thread didn't exit the physicsThreadMethod method as the NSLog does not appear in the console. Dealloc was only called when I run 'back' a second time.</p> <p>I'm not really sure why this is happening, so I would really appreciate any help. Thanks!</p>
 

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