Hi, According to http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html, __sync_bool_compare_and_swap() supports int, long, long long, and their unsigned counterparts, and GCC will allow any integral scalar or pointer type that is 1, 2, 4 or 8 bytes in length. I wonder in what situation the pointer type won't be 1, 2, 4 or 8 bytes in length. Let's say I am running on a 64-bit Intel CPU. Thanks in advance. Cheers, Hei
