[PATCH] D17951: Implement is_always_lock_free

[JF Bastien via cfe-commits]

jfb added inline comments.

================
Comment at: include/atomic:900
@@ +899,3 @@
+# if defined(_LIBCPP_LOCK_FREE_IS_SIZE_BASED)
+  static _LIBCPP_CONSTEXPR bool is_always_lock_free = __libcpp_always_lock_free<sizeof(_Tp)>;
+# else
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Actually, this should be based on `sizeof(__a_)` and *not* `sizeof(_Tp)`.


http://reviews.llvm.org/D17951