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
12 // <atomic>
13
14 // struct atomic_flag
15
16 // atomic_flag() = ATOMIC_FLAG_INIT;
17
18 #include <atomic>
19 #include <cassert>
20
main()21 int main()
22 {
23 std::atomic_flag f = ATOMIC_FLAG_INIT;
24 assert(f.test_and_set() == 0);
25 }
26