Author: emaste
Date: Sun Aug 18 08:18:49 2013
New Revision: 254477
URL: http://svnweb.freebsd.org/changeset/base/254477
Log:
MFC r239960:
Properly enable Clang-style atomics when available.
In addition to testing against cxx_atomic, we must check c_atomic. The
former is only set when building C++ code. Also use __has_extension
instead of __has_feature. This allows us to use the atomics outside of
C11.
PR: threads/170073
Modified:
stable/9/include/stdatomic.h
Directory Properties:
stable/9/include/ (props changed)
Modified: stable/9/include/stdatomic.h
==============================================================================
--- stable/9/include/stdatomic.h Sun Aug 18 06:08:52 2013
(r254476)
+++ stable/9/include/stdatomic.h Sun Aug 18 08:18:49 2013
(r254477)
@@ -33,7 +33,7 @@
#include <sys/cdefs.h>
#include <sys/_types.h>
-#if __has_feature(cxx_atomic)
+#if __has_extension(c_atomic) || __has_extension(cxx_atomic)
#define __CLANG_ATOMICS
#elif __GNUC_PREREQ__(4, 7)
#define __GNUC_ATOMICS
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