On Tue, Aug 31, 2010 at 9:45 AM, David Duncan <david.dun...@apple.com> wrote:
>
> On Aug 31, 2010, at 9:34 AM, Roland King wrote:
>
>> Of course I now have to ask if I *were* doing it .. what's the issue?
>
> Under GC -retain, -release, -autorelease and -retainCount are no-ops 
> (objc_msgSend doesn't even dispatch them).
>
>> Is it that autorelease doesn't do anything so the CF type never gets the 
>> CFRelease() call it would do from a real -release? What does 
>> CFMakeCollectable() do if you are memory managed .. nothing? These are 
>> things I've not had to worry about but you piqued my interest.
>
>
> CFMakeCollectable() does nothing under Retain/Release and calls CFRelease() 
> under GC. The typical idiom for dual mode code is to do 
> "[NSMakeCollectable(foo) autorelease]" which will ensure the object will be 
> released under both RR and GC (NSMakeCollectable is identical to 
> CFMakeCollectable except for its return value being id instead of void*).

To backup what David states review...

<http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/GarbageCollection/Articles/gcCoreFoundation.html>
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