I don't see anything wrong with the output being 1/2:
-(void) test
{
testString = NULL;
dispatch_async(dispatch_get_global_queue(0, 0), ^{
dispatch_async(dispatch_get_main_queue(), ^{
NSString* aString = [[NSMutableString alloc] init];* //
retain count is 1*
NSLog(@"retainCount: %d",[aString retainCount]);
testString = [aString retain]; *// retain count is 2*
[aString *auto*release]; *// retain count is still 2
- object will be released sometimes in the future*
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"retainCount: %d",[testString
retainCount]);* // you can't assume the future release has already been
called*
});
});
});
}
On Mon, Apr 19, 2010 at 11:35 AM, Henk Kampman
<henk.kamp...@secondmove.com>wrote:
> 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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