[atomic] Comment

4 years ago · a666fe64a9
parent 3528a21e8d
commit a666fe64a9
1 changed files with 3 additions and 1 deletions
--- a/src/hb-atomic.hh
+++ b/src/hb-atomic.hh
@ -52,7 +52,7 @@

 #elif !defined(HB_NO_MT) && defined(__ATOMIC_ACQUIRE)

-/* C++11-style GCC primitives. */
+/* C++11-style GCC primitives. We prefer these as they don't require standard library. */

 #define _hb_memory_barrier()			__sync_synchronize ()

@ -102,6 +102,8 @@ _hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N)


 #elif !defined(HB_NO_MT) && defined(_WIN32)
+/* Windows branch still needed because MSVC doesn't correctly define __cplusplus:
+ * https://github.com/harfbuzz/harfbuzz/pull/2362 */

 #include <windows.h>