1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// UNSUPPORTED: libcpp-has-no-threads
11// XFAIL: c++98, c++03
12
13// <atomic>
14
15// struct atomic_flag
16
17// atomic_flag() = ATOMIC_FLAG_INIT;
18
19#include <atomic>
20#include <cassert>
21
22int main()
23{
24    std::atomic_flag f = ATOMIC_FLAG_INIT;
25    assert(f.test_and_set() == 0);
26}
27