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//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// XFAIL: !has-64-bit-atomics
// integral-type fetch_and(integral-type, memory_order = memory_order::seq_cst) const noexcept;
#include <atomic>
#include <cassert>
#include <concepts>
#include <type_traits>
#include "atomic_helpers.h"
#include "test_macros.h"
template <typename T>
concept has_fetch_and = requires {
std::declval<T const>().fetch_and(std::declval<T>());
std::declval<T const>().fetch_and(std::declval<T>(), std::declval<std::memory_order>());
};
template <typename T>
struct TestDoesNotHaveFetchAnd {
void operator()() const { static_assert(!has_fetch_and<std::atomic_ref<T>>); }
};
template <typename T>
struct TestFetchAnd {
void operator()() const {
static_assert(std::is_integral_v<T>);
T x(T(1));
std::atomic_ref<T> const a(x);
{
std::same_as<T> decltype(auto) y = a.fetch_and(T(2));
assert(y == T(1));
assert(x == T(0));
ASSERT_NOEXCEPT(a.fetch_and(T(0)));
}
x = T(1);
{
std::same_as<T> decltype(auto) y = a.fetch_and(T(2), std::memory_order_relaxed);
assert(y == T(1));
assert(x == T(0));
ASSERT_NOEXCEPT(a.fetch_and(T(0), std::memory_order_relaxed));
}
}
};
int main(int, char**) {
TestEachIntegralType<TestFetchAnd>()();
TestEachFloatingPointType<TestDoesNotHaveFetchAnd>()();
TestEachPointerType<TestDoesNotHaveFetchAnd>()();
TestDoesNotHaveFetchAnd<bool>()();
TestDoesNotHaveFetchAnd<UserAtomicType>()();
TestDoesNotHaveFetchAnd<LargeUserAtomicType>()();
return 0;
}
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