1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // UNSUPPORTED: libcpp-has-no-threads
10 // XFAIL: c++98, c++03
11 
12 // <atomic>
13 
14 // struct atomic_flag
15 
16 // atomic_flag() = ATOMIC_FLAG_INIT;
17 
18 #include <atomic>
19 #include <cassert>
20 
21 int main(int, char**)
22 {
23     std::atomic_flag f = ATOMIC_FLAG_INIT;
24     assert(f.test_and_set() == 0);
25 
26   return 0;
27 }
28