[PATCH] D17950: Implement is_always_lock_free

[JF Bastien via cfe-commits]

jfb added a comment.

I'll check with GCC folks whether they want to share macros the same way we're already sharing `__GCC_ATOMIC_*_LOCK_FREE`. The new macros I propose are `__LLVM__ATOMIC_*_BYTES_LOCK_FREE` and `__LLVM_LOCK_FREE_IS_SIZE_BASED`.

Let's do a first sanity-check round of code reviews to make sure I have the LLVM-isms down right, then I'll add GCC folks.


http://reviews.llvm.org/D17950