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0e34f3f496
This patch documents the underlying API for implementing atomics on a platform. This doesn't change the operations that std::atomic is based on, but it reorganizes the C11 / GCC implementation split to make it clearer what's the base support layer and what's not.
29 lines
938 B
C
29 lines
938 B
C
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ATOMIC_FENCE_H
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#define _LIBCPP___ATOMIC_FENCE_H
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#include <__atomic/memory_order.h>
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#include <__atomic/support.h>
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#include <__config>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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inline _LIBCPP_HIDE_FROM_ABI void atomic_thread_fence(memory_order __m) _NOEXCEPT { __cxx_atomic_thread_fence(__m); }
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inline _LIBCPP_HIDE_FROM_ABI void atomic_signal_fence(memory_order __m) _NOEXCEPT { __cxx_atomic_signal_fence(__m); }
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ATOMIC_FENCE_H
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