//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <atomic>
// struct atomic_flag
// TESTING EXTENSION atomic_flag(bool)
#include <atomic>
#include <cassert>
#include "test_macros.h"
#if TEST_STD_VER >= 11
// Ensure that static initialization happens; this is PR#37226
extern std::atomic_flag global;
struct X { X() { global.test_and_set(); }};
X x;
std::atomic_flag global{false};
#endif
int main(int, char**)
{
#if TEST_STD_VER >= 11
assert(global.test_and_set() == 1);
#endif
{
std::atomic_flag f(false);
assert(f.test_and_set() == 0);
}
{
std::atomic_flag f(true);
assert(f.test_and_set() == 1);
}
return 0;
}