On Apr 17, 2010, at 9:35 AM, Jean-Daniel Dupas wrote: > That said, this is an implementation details. > > IIRC, GnuStep used to store the retain count in 4 additional bytes allocated > before each object. > > uint32_t *rc = (uint8_t *)self - 4;
Well, it's an implementation detail of which you have to be aware if you implement a custom allocator for objects (override -allocWithZone:), which I had suggested earlier in the thread. If the retain count is either a traditional ivar (which it isn't) or is held externally, then you can do your own allocation and continue using the basic retain/release implementation. If the retain count is expected to be in the allocated memory, even if it's before the instance address, then you have to override and reimplement -retain and -release if you override -allocWithZone:. Regards, 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
