diff options
Diffstat (limited to 'libstdc++-v3/include/bits/atomic_base.h')
| -rw-r--r-- | libstdc++-v3/include/bits/atomic_base.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/libstdc++-v3/include/bits/atomic_base.h b/libstdc++-v3/include/bits/atomic_base.h index 87fe0bd6000..3b66b040976 100644 --- a/libstdc++-v3/include/bits/atomic_base.h +++ b/libstdc++-v3/include/bits/atomic_base.h @@ -208,6 +208,26 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION return __atomic_test_and_set (&_M_i, int(__m)); } +#if __cplusplus > 201703L +#define __cpp_lib_atomic_flag_test 201907L + + _GLIBCXX_ALWAYS_INLINE bool + test(memory_order __m = memory_order_seq_cst) noexcept + { + __atomic_flag_data_type __v; + __atomic_load(&_M_i, &__v, int(__m)); + return __v == __GCC_ATOMIC_TEST_AND_SET_TRUEVAL; + } + + _GLIBCXX_ALWAYS_INLINE bool + test(memory_order __m = memory_order_seq_cst) volatile noexcept + { + __atomic_flag_data_type __v; + __atomic_load(&_M_i, &__v, int(__m)); + return __v == __GCC_ATOMIC_TEST_AND_SET_TRUEVAL; + } +#endif // C++20 + _GLIBCXX_ALWAYS_INLINE void clear(memory_order __m = memory_order_seq_cst) noexcept { |