2009/4/26 Trygve Inda <cocoa...@xericdesign.com>:
> - (void)threadMethod:(id)anObject
> {
> NSAutoreleasePool* outterPool = [[NSAutoreleasePool alloc] init];
>
> NSDictionary* userDefaults = [NSUserDefaults standardUserDefaults]
> importantValue = [[userDefaults objectForKey:@"myKey"] boolValue];
>
> while (1)
> {
> NSAutoreleasePool* innerPool = [[NSAutoreleasePool alloc] init];
>
> if (![self threadMustExit])
> [self doStuffWith:importantValue];
> if (![self threadMustExit])
> [self doMoreStuff];
> if (![self threadMustExit])
> [self doEvenMore];
>
> [innerPool release];
>
> if ([lock lockWhenCondition:kConditionThreadMustExit])
> {
> [lock unlock];
> break;
> }
> }
>
> [lock lock];
> [lock unlockWithCondition:kConditionThreadIdle];
>
> [outterPool release];
> }
>
>
> This crashes the second time through the loop (when innerPool is being
> created for the second time). Why?
How about posting your real code instead of a weird paraphrase? This
won't even compile. Aside from the obvious doMoreStuff methods in the
middle, the lockWhenCondition: method returns void, so if ([lock
lockWhenCondition:kConditionThreadMustExit]) is not going to compile.
It's impossible to diagnose a problem when we're not even looking at
the same code as the code that crashes.
> I need to drain the pool each time through the inner loop. I am not using
> Garbage Collection.
>
> Thread 4 Crashed:
> 0 libobjc.A.dylib 0x9557f688 objc_msgSend + 24
> 1 com.xericdesign.earthdesk.core 0x00008b3c 0x1000 + 31548
> 2 com.apple.Foundation 0x92a0e7ed -[NSThread main] + 45
> 3 com.apple.Foundation 0x92a0e394 __NSThread__main__ + 308
> 4 libSystem.B.dylib 0x90e7b095 _pthread_start + 321
> 5 libSystem.B.dylib 0x90e7af52 thread_start + 34
Looks like a pretty standard memory mismanagement crash to me. Turn on
zombies and start seeing what's being over-released.
Mike
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