No. See the email you replied to for why not. David
On 8 Jun 2013, at 18:20, Maxthon Chan <[email protected]> wrote: > So I can safely do this? (Macro rewritten as inline function) > > static inline __attribute__((always_inline)) BOOL objc_isSmallObject(id obj) > { > return (((intptr_t)obj) & 1) ? YES : NO; > } > > 在 2013-6-8，上午4:10，David Chisnall <[email protected]> 写道： > >> On 7 Jun 2013, at 16:29, Luboš Doležel <[email protected]> wrote: >> >>> for toll-free bridging in CoreBase, I need a way to detect whether the >>> incoming pointer is a small object encoded in a pointer and act accordingly >>> (treat it as an ObjC object and avoid reading it). >> >> In objc/runtime.h, there is a constant SMALL_OBJECT_MASK. If ptr & >> SMALL_OBJECT_MASK == 0, then the pointer is not a small object. >> >> On 32-bit platforms, the low bit of the pointer will be 0. On 64-bit >> platforms, the low 3 bits will always be zero. >> >> David >> >> >> _______________________________________________ >> Gnustep-dev mailing list >> [email protected] >> https://lists.gnu.org/mailman/listinfo/gnustep-dev > > > _______________________________________________ > Gnustep-dev mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/gnustep-dev -- This email complies with ISO 3103 _______________________________________________ Gnustep-dev mailing list [email protected] https://lists.gnu.org/mailman/listinfo/gnustep-dev
