On Apr 17, 2010, at 8:53 AM, Paul Sanders wrote: > Something I've never been clear about though is > where an object's retain count is stored. This obviously > requires an iVar somewhere (in addition to isA), so there might > be a trap for the unwary there [...]
My understanding, which is vague and for which I have no references, is that it's handled in a manner similar to what was recently exposed via the associated references API (i.e. objc_setAssociatedObject and friends). That is, retain counts are stored outside of the instance. Having just looked up the source for CFRelease, I can't say my understanding has increased. ;) Although, there is confirmation there that the retain count is at least sometimes held externally. Would be an interesting subject for Mr. Bumgarner to expound upon on his blog. Cheers, Ken _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
