You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.0 KiB
C++
46 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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: libcpp-has-no-threads
|
|
|
|
// <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 = ATOMIC_FLAG_INIT;
|
|
#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;
|
|
}
|