On 04/20/2016 10:17 AM, Emilio G. Cota wrote:
I've tried to find a GCC intrinsic for test-and-set, and I've only found lock_test_and_set, which is what we use for atomic_xchg (except on ppc) because it really is an atomic exchange: "This builtin, as described by Intel, is not a traditional test-and-set operation, but rather an atomic exchange operation." https://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Atomic-Builtins.html
Please read the entire documentation, not just the first sentence. r~
