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| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___ATOMIC_IS_ALWAYS_LOCK_FREE_H |
| 10 | #define _LIBCPP___ATOMIC_IS_ALWAYS_LOCK_FREE_H |
| 11 | |
| 12 | #include <__config> |
| 13 | |
| 14 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 15 | # pragma GCC system_header |
| 16 | #endif |
| 17 | |
| 18 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 19 | |
| 20 | template <class _Tp> |
| 21 | struct __libcpp_is_always_lock_free { |
| 22 | // __atomic_always_lock_free is available in all Standard modes |
| 23 | static const bool __value = __atomic_always_lock_free(sizeof(_Tp), nullptr); |
| 24 | }; |
| 25 | |
| 26 | _LIBCPP_END_NAMESPACE_STD |
| 27 | |
| 28 | #endif // _LIBCPP___ATOMIC_IS_ALWAYS_LOCK_FREE_H |
| 29 |
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