42ba740aff
Implement the std::atomic_ref class template by reusing atomic_base_impl. Based on the work from https://reviews.llvm.org/D72240
40 lines
1015 B
C++
40 lines
1015 B
C++
//
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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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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// static constexpr size_t required_alignment;
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#include <atomic>
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#include <cassert>
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#include <concepts>
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template <typename T>
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constexpr void check_required_alignment() {
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std::same_as<const std::size_t> decltype(auto) required_alignment = std::atomic_ref<T>::required_alignment;
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assert(required_alignment >= alignof(T));
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}
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constexpr bool test() {
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check_required_alignment<int>();
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check_required_alignment<float>();
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check_required_alignment<int*>();
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struct Empty {};
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check_required_alignment<Empty>();
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struct Trivial {
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int a;
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};
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check_required_alignment<Trivial>();
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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