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 // <atomic> 11 12 // struct atomic_flag 13 14 // void clear(memory_order = memory_order_seq_cst); 15 // void clear(memory_order = memory_order_seq_cst) volatile; 16 17 #include <atomic> 18 #include <cassert> 19 20 int main() 21 { 22 { 23 std::atomic_flag f; 24 f.test_and_set(); 25 f.clear(); 26 assert(f.test_and_set() == 0); 27 } 28 { 29 std::atomic_flag f; 30 f.test_and_set(); 31 f.clear(std::memory_order_relaxed); 32 assert(f.test_and_set() == 0); 33 } 34 { 35 std::atomic_flag f; 36 f.test_and_set(); 37 f.clear(std::memory_order_release); 38 assert(f.test_and_set() == 0); 39 } 40 { 41 std::atomic_flag f; 42 f.test_and_set(); 43 f.clear(std::memory_order_seq_cst); 44 assert(f.test_and_set() == 0); 45 } 46 { 47 volatile std::atomic_flag f; 48 f.test_and_set(); 49 f.clear(); 50 assert(f.test_and_set() == 0); 51 } 52 { 53 volatile std::atomic_flag f; 54 f.test_and_set(); 55 f.clear(std::memory_order_relaxed); 56 assert(f.test_and_set() == 0); 57 } 58 { 59 volatile std::atomic_flag f; 60 f.test_and_set(); 61 f.clear(std::memory_order_release); 62 assert(f.test_and_set() == 0); 63 } 64 { 65 volatile std::atomic_flag f; 66 f.test_and_set(); 67 f.clear(std::memory_order_seq_cst); 68 assert(f.test_and_set() == 0); 69 } 70 } 71
