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add compare_and_swap check in check-atomic.m4

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WeiY
2013-08-19 23:36:28 +08:00
committed by Sebastian Huber
parent 99b35052ae
commit 0432dff73f
1 changed files with 3 additions and 1 deletions
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4
cpukit/aclocal/check-atomic.m4
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@@ -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"])