On Aug 8, 2011, at 11:43 PM, Roland King wrote: > After a bit of googling I came across some posts which explained Block_Copy() > would treat a variable adorned with __attribute__((NSObject)) similarly to > NSObjects and retain them. So changing the method signature to this > > -(void)convert:(__attribute__((NSObject))CGImageRef)image > withBlock:(ImageResizedBlock)callbackBlock > > appears to do the right thing in my testing, the CGImageRef is CFRetain()ed > when the block is enqueued and I assume CFRelease()d later. I prefer this > syntax, as I find it self-documenting; > > I can't find anywhere apart from blog posts and the block specification > itself which says this works. Does anyone know if it's officially supported, > for gcc and clang and something that apple is likely to support going forward > into ARC
The ARC specification defines a "retainable pointer" as including those pointers that have the __attribute__((NSObject)) decoration, so this should behave as expected under ARC. <http://clang.llvm.org/docs/AutomaticReferenceCounting.html#objects> -- David Duncan _______________________________________________ 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
