179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant//===----------------------------------------------------------------------===// 279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// 379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// The LLVM Compiler Infrastructure 479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 779101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// 879101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant//===----------------------------------------------------------------------===// 97112dae6acac544a0271a85d95342c583441e2d1Dan Albert// 107112dae6acac544a0271a85d95342c583441e2d1Dan Albert// UNSUPPORTED: libcpp-has-no-threads 1179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 1279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// <atomic> 1379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 1479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// struct atomic_flag 1579101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 1679101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// atomic_flag() = ATOMIC_FLAG_INIT; 1779101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 1879101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant#include <atomic> 1979101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant#include <cassert> 2079101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 2179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnantint main() 2279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant{ 2379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant std::atomic_flag f = ATOMIC_FLAG_INIT; 2479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 2579101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant} 26