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| author | WeiY <wei.a.yang@gmail.com> | 2013-08-19 23:36:28 +0800 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-08-20 10:42:43 +0200 |
| commit | 0432dff73fbcf73ed75a02c07fe0f0690b306aee (patch) | |
| tree | 92616b3f7c084a700fef0098a8edd1274e5307c6 /cpukit/aclocal | |
| parent | smp: Add Deterministic Priority SMP Scheduler (diff) | |
| download | rtems-0432dff73fbcf73ed75a02c07fe0f0690b306aee.tar.bz2 | |
add compare_and_swap check in check-atomic.m4
Diffstat (limited to 'cpukit/aclocal')
| -rw-r--r-- | cpukit/aclocal/check-atomic.m4 | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/cpukit/aclocal/check-atomic.m4 b/cpukit/aclocal/check-atomic.m4 index 00149f8a12..69cca509a7 100644 --- a/cpukit/aclocal/check-atomic.m4 +++ b/cpukit/aclocal/check-atomic.m4 @@ -7,9 +7,11 @@ AC_CACHE_CHECK([whether CPU supports atomic operations], [rtems_cv_ATOMIC],[ AC_LINK_IFELSE( [AC_LANG_PROGRAM([[#include <stdatomic.h>]], - [[atomic_uint_fast32_t t; atomic_init(&t, 0); + [[atomic_uint_fast32_t t; uint_fast32_t m = 1; + atomic_init(&t, 0); atomic_store( &t, 1 ); atomic_exchange( &t, 2 ); + atomic_compare_exchange_strong( &t, &m, 2); atomic_fetch_add( &t, 3 );]])], [rtems_cv_ATOMIC="yes"], [rtems_cv_ATOMIC="no"]) |