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authorSirshak Das <sirshak.das@arm.com>2019-05-28 08:44:46 -0500
committerDamjan Marion <dmarion@me.com>2019-06-05 13:48:53 +0000
commit3bb6540ab531f5474217f5f1f7cb7b8dce1d4e57 (patch)
treef2fd75b2e78990a0f079d7f700a9ac5d597b72bd
parent607a23a1753ee8dc7e9150f09bb376553ed62639 (diff)
Switch atomic test and set API from __sync to __atomic builtin
__sync_test_and_set uses full memory barriers for AArch64, __atomic_exchange(ACQUIRE) would use load acquire. Change-Id: Ifdf2481db3b9dde6c5842d75671402862adb6d81 Signed-off-by: Sirshak Das <sirshak.das@arm.com> Reviewed-by: Lijian Zhang <Lijian.Zhang@arm.com> Reviewed-by: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
-rw-r--r--src/vppinfra/atomics.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vppinfra/atomics.h b/src/vppinfra/atomics.h
index 5444b6df350..1d480af407b 100644
--- a/src/vppinfra/atomics.h
+++ b/src/vppinfra/atomics.h
@@ -37,7 +37,7 @@
#define clib_atomic_cmp_and_swap(addr,old,new) __sync_val_compare_and_swap(addr, old, new)
#define clib_atomic_bool_cmp_and_swap(addr,old,new) __sync_bool_compare_and_swap(addr, old, new)
-#define clib_atomic_test_and_set(a) __sync_lock_test_and_set(a, 1)
+#define clib_atomic_test_and_set(a) __atomic_exchange_n(a, 1, __ATOMIC_ACQUIRE)
#define clib_atomic_release(a) __sync_lock_release(a)
#define clib_atomic_fence_rel() __atomic_thread_fence(__ATOMIC_RELEASE);