diff options
Diffstat (limited to 'libcxx/src/include/atomic_support.h')
| -rw-r--r-- | libcxx/src/include/atomic_support.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/libcxx/src/include/atomic_support.h b/libcxx/src/include/atomic_support.h index 08847e63070..ccd8d78d3d7 100644 --- a/libcxx/src/include/atomic_support.h +++ b/libcxx/src/include/atomic_support.h @@ -16,6 +16,7 @@ #if defined(__clang__) && __has_builtin(__atomic_load_n) \ && __has_builtin(__atomic_store_n) \ && __has_builtin(__atomic_add_fetch) \ + && __has_builtin(__atomic_exchange_n) \ && __has_builtin(__atomic_compare_exchange_n) \ && defined(__ATOMIC_RELAXED) \ && defined(__ATOMIC_CONSUME) \ @@ -84,6 +85,14 @@ _ValueType __libcpp_atomic_add(_ValueType* __val, _AddType __a, template <class _ValueType> inline _LIBCPP_INLINE_VISIBILITY +_ValueType __libcpp_atomic_exchange(_ValueType* __target, + _ValueType __value, int __order = _AO_Seq) +{ + return __atomic_exchange_n(__target, __value, __order); +} + +template <class _ValueType> +inline _LIBCPP_INLINE_VISIBILITY bool __libcpp_atomic_compare_exchange(_ValueType* __val, _ValueType* __expected, _ValueType __after, int __success_order = _AO_Seq, @@ -137,6 +146,16 @@ _ValueType __libcpp_atomic_add(_ValueType* __val, _AddType __a, template <class _ValueType> inline _LIBCPP_INLINE_VISIBILITY +_ValueType __libcpp_atomic_exchange(_ValueType* __target, + _ValueType __value, int __order = _AO_Seq) +{ + _ValueType old = *__target; + *__target = __value; + return old; +} + +template <class _ValueType> +inline _LIBCPP_INLINE_VISIBILITY bool __libcpp_atomic_compare_exchange(_ValueType* __val, _ValueType* __expected, _ValueType __after, int = 0, int = 0) |
