blocks and autorelease weirdness
blocks and autorelease weirdness
- Subject: blocks and autorelease weirdness
- From: Henk Kampman <email@hidden>
- Date: Mon, 19 Apr 2010 11:35:00 +0200
Have a look at the following code
-(void) test
{
testString = NULL;
dispatch_async(dispatch_get_global_queue(0, 0), ^{
dispatch_async(dispatch_get_main_queue(), ^{
NSString* aString = [[NSMutableString alloc] init];
NSLog(@"retainCount: %d",[aString retainCount]);
testString = [aString retain];
[aString release];
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"retainCount: %d",[testString retainCount]);
});
});
});
}
As expected the output is:
retainCount: 1
retainCount: 1
However when I change [aString release] to [aString autorelease] the output shows:
retainCount: 1
retainCount: 2
Why?
BTW I first noticed this behavior when my application started leaking the QTMovie objects I was creating in a block.
-
Henk_______________________________________________
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