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//===----------------------------------------------------------------------===// 979101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 1079101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// <atomic> 1179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 1279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// struct atomic_flag 1379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 1479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// void clear(memory_order = memory_order_seq_cst); 1579101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant// void clear(memory_order = memory_order_seq_cst) volatile; 1679101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 1779101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant#include <atomic> 1879101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant#include <cassert> 1979101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant 2079101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnantint main() 2179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant{ 2279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant { 2379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant std::atomic_flag f; 2479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.test_and_set(); 2579101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.clear(); 2679101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 2779101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant } 2879101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant { 2979101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant std::atomic_flag f; 3079101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.test_and_set(); 3179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.clear(std::memory_order_relaxed); 3279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 3379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant } 3479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant { 3579101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant std::atomic_flag f; 3679101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.test_and_set(); 3779101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.clear(std::memory_order_release); 3879101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 3979101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant } 4079101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant { 4179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant std::atomic_flag f; 4279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.test_and_set(); 4379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.clear(std::memory_order_seq_cst); 4479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 4579101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant } 4679101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant { 4779101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant volatile std::atomic_flag f; 4879101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.test_and_set(); 4979101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.clear(); 5079101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 5179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant } 5279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant { 5379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant volatile std::atomic_flag f; 5479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.test_and_set(); 5579101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.clear(std::memory_order_relaxed); 5679101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 5779101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant } 5879101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant { 5979101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant volatile std::atomic_flag f; 6079101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.test_and_set(); 6179101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.clear(std::memory_order_release); 6279101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 6379101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant } 6479101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant { 6579101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant volatile std::atomic_flag f; 6679101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.test_and_set(); 6779101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant f.clear(std::memory_order_seq_cst); 6879101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant assert(f.test_and_set() == 0); 6979101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant } 7079101aec3ad3070ad1378ca1450b72edf8ed67daHoward Hinnant} 71