| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___ATOMIC_IS_ALWAYS_LOCK_FREE_H |
| #define _LIBCPP___ATOMIC_IS_ALWAYS_LOCK_FREE_H |
| |
| #include <__config> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Tp> |
| struct __libcpp_is_always_lock_free { |
| // __atomic_always_lock_free is available in all Standard modes |
| static const bool __value = __atomic_always_lock_free(sizeof(_Tp), 0); |
| }; |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___ATOMIC_IS_ALWAYS_LOCK_FREE_H |
