09e3a36058
This patch adds a large number of missing includes in the libc++ headers and the test suite. Those were found as part of the effort to move towards a mostly monolithic top-level std module.
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
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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// XFAIL: !has-64-bit-atomics
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// integral-type fetch_and(integral-type, memory_order = memory_order::seq_cst) const noexcept;
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#include <atomic>
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#include <cassert>
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#include <concepts>
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#include <type_traits>
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#include <utility>
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#include "atomic_helpers.h"
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#include "test_macros.h"
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template <typename T>
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concept has_fetch_and = requires {
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std::declval<T const>().fetch_and(std::declval<T>());
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std::declval<T const>().fetch_and(std::declval<T>(), std::declval<std::memory_order>());
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};
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template <typename T>
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struct TestDoesNotHaveFetchAnd {
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void operator()() const { static_assert(!has_fetch_and<std::atomic_ref<T>>); }
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};
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template <typename T>
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struct TestFetchAnd {
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void operator()() const {
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static_assert(std::is_integral_v<T>);
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T x(T(1));
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std::atomic_ref<T> const a(x);
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{
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std::same_as<T> decltype(auto) y = a.fetch_and(T(2));
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assert(y == T(1));
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assert(x == T(0));
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ASSERT_NOEXCEPT(a.fetch_and(T(0)));
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}
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x = T(1);
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{
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std::same_as<T> decltype(auto) y = a.fetch_and(T(2), std::memory_order_relaxed);
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assert(y == T(1));
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assert(x == T(0));
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ASSERT_NOEXCEPT(a.fetch_and(T(0), std::memory_order_relaxed));
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}
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}
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};
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int main(int, char**) {
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TestEachIntegralType<TestFetchAnd>()();
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TestEachFloatingPointType<TestDoesNotHaveFetchAnd>()();
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TestEachPointerType<TestDoesNotHaveFetchAnd>()();
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TestDoesNotHaveFetchAnd<bool>()();
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TestDoesNotHaveFetchAnd<UserAtomicType>()();
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TestDoesNotHaveFetchAnd<LargeUserAtomicType>()();
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return 0;
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}
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