Author: ed
Date: Sun Jun 16 10:48:47 2013
New Revision: 251804
URL: http://svnweb.freebsd.org/changeset/base/251804
Log:
Move _Atomic() into <sys/cdefs.h>.
That way _Atomic() is defined next to all the other C11 keywords for
which we provide compatibility for pre-C11 compilers. While there, fix
the definition to place "volatile" at the end. Otherwise pointer types
will become "volatile T *" instead of "T * volatile".
Modified:
head/sys/sys/cdefs.h
head/sys/sys/stdatomic.h
Modified: head/sys/sys/cdefs.h
==============================================================================
--- head/sys/sys/cdefs.h Sun Jun 16 09:30:35 2013 (r251803)
+++ head/sys/sys/cdefs.h Sun Jun 16 10:48:47 2013 (r251804)
@@ -268,6 +268,14 @@
#define _Alignof(x) __alignof(x)
#endif
+#if !__has_extension(c_atomic) && !__has_extension(cxx_atomic)
+/*
+ * No native support for _Atomic(). Place object in structure to prevent
+ * most forms of direct non-atomic access.
+ */
+#define _Atomic(T) struct { T volatile __val; }
+#endif
+
#if defined(__cplusplus) && __cplusplus >= 201103L
#define _Noreturn [[noreturn]]
#else
Modified: head/sys/sys/stdatomic.h
==============================================================================
--- head/sys/sys/stdatomic.h Sun Jun 16 09:30:35 2013 (r251803)
+++ head/sys/sys/stdatomic.h Sun Jun 16 10:48:47 2013 (r251804)
@@ -43,10 +43,6 @@
#error "stdatomic.h does not support your compiler"
#endif
-#if !defined(__CLANG_ATOMICS)
-#define _Atomic(T) struct { volatile T __val; }
-#endif
-
/*
* 7.17.1 Atomic lock-free macros.
*/
_______________________________________________
svn-src-all@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
