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
main()22 int main()
23 {
24 std::atomic_flag f = ATOMIC_FLAG_INIT;
25 assert(f.test_and_set() == 0);
26 }
27