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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_TO_GCC_ORDER_H
10#define _LIBCPP___ATOMIC_TO_GCC_ORDER_H
11
12#include <__atomic/memory_order.h>
13#include <__config>
14
15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16# pragma GCC system_header
17#endif
18
19_LIBCPP_BEGIN_NAMESPACE_STD
20
21#if defined(__ATOMIC_RELAXED) && defined(__ATOMIC_CONSUME) && defined(__ATOMIC_ACQUIRE) && \
22 defined(__ATOMIC_RELEASE) && defined(__ATOMIC_ACQ_REL) && defined(__ATOMIC_SEQ_CST)
23
24_LIBCPP_HIDE_FROM_ABI inline _LIBCPP_CONSTEXPR int __to_gcc_order(memory_order __order) {
25 // Avoid switch statement to make this a constexpr.
26 return __order == memory_order_relaxed
27 ? __ATOMIC_RELAXED
28 : (__order == memory_order_acquire
29 ? __ATOMIC_ACQUIRE
30 : (__order == memory_order_release
31 ? __ATOMIC_RELEASE
32 : (__order == memory_order_seq_cst
33 ? __ATOMIC_SEQ_CST
34 : (__order == memory_order_acq_rel ? __ATOMIC_ACQ_REL : __ATOMIC_CONSUME))));
35}
36
37_LIBCPP_HIDE_FROM_ABI inline _LIBCPP_CONSTEXPR int __to_gcc_failure_order(memory_order __order) {
38 // Avoid switch statement to make this a constexpr.
39 return __order == memory_order_relaxed
40 ? __ATOMIC_RELAXED
41 : (__order == memory_order_acquire
42 ? __ATOMIC_ACQUIRE
43 : (__order == memory_order_release
44 ? __ATOMIC_RELAXED
45 : (__order == memory_order_seq_cst
46 ? __ATOMIC_SEQ_CST
47 : (__order == memory_order_acq_rel ? __ATOMIC_ACQUIRE : __ATOMIC_CONSUME))));
48}
49
50#endif
51
52_LIBCPP_END_NAMESPACE_STD
53
54#endif // _LIBCPP___ATOMIC_TO_GCC_ORDER_H