1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <atomic> 10 11 // struct atomic_flag 12 13 // bool test_and_set(memory_order = memory_order_seq_cst); 14 // bool test_and_set(memory_order = memory_order_seq_cst) volatile; 15 16 #include <atomic> 17 #include <cassert> 18 19 #include "test_macros.h" 20 main(int,char **)21int main(int, char**) 22 { 23 { 24 std::atomic_flag f; 25 f.clear(); 26 assert(f.test_and_set() == 0); 27 assert(f.test_and_set() == 1); 28 } 29 { 30 std::atomic_flag f; 31 f.clear(); 32 assert(f.test_and_set(std::memory_order_relaxed) == 0); 33 assert(f.test_and_set(std::memory_order_relaxed) == 1); 34 } 35 { 36 std::atomic_flag f; 37 f.clear(); 38 assert(f.test_and_set(std::memory_order_consume) == 0); 39 assert(f.test_and_set(std::memory_order_consume) == 1); 40 } 41 { 42 std::atomic_flag f; 43 f.clear(); 44 assert(f.test_and_set(std::memory_order_acquire) == 0); 45 assert(f.test_and_set(std::memory_order_acquire) == 1); 46 } 47 { 48 std::atomic_flag f; 49 f.clear(); 50 assert(f.test_and_set(std::memory_order_release) == 0); 51 assert(f.test_and_set(std::memory_order_release) == 1); 52 } 53 { 54 std::atomic_flag f; 55 f.clear(); 56 assert(f.test_and_set(std::memory_order_acq_rel) == 0); 57 assert(f.test_and_set(std::memory_order_acq_rel) == 1); 58 } 59 { 60 std::atomic_flag f; 61 f.clear(); 62 assert(f.test_and_set(std::memory_order_seq_cst) == 0); 63 assert(f.test_and_set(std::memory_order_seq_cst) == 1); 64 } 65 { 66 volatile std::atomic_flag f; 67 f.clear(); 68 assert(f.test_and_set() == 0); 69 assert(f.test_and_set() == 1); 70 } 71 { 72 volatile std::atomic_flag f; 73 f.clear(); 74 assert(f.test_and_set(std::memory_order_relaxed) == 0); 75 assert(f.test_and_set(std::memory_order_relaxed) == 1); 76 } 77 { 78 volatile std::atomic_flag f; 79 f.clear(); 80 assert(f.test_and_set(std::memory_order_consume) == 0); 81 assert(f.test_and_set(std::memory_order_consume) == 1); 82 } 83 { 84 volatile std::atomic_flag f; 85 f.clear(); 86 assert(f.test_and_set(std::memory_order_acquire) == 0); 87 assert(f.test_and_set(std::memory_order_acquire) == 1); 88 } 89 { 90 volatile std::atomic_flag f; 91 f.clear(); 92 assert(f.test_and_set(std::memory_order_release) == 0); 93 assert(f.test_and_set(std::memory_order_release) == 1); 94 } 95 { 96 volatile std::atomic_flag f; 97 f.clear(); 98 assert(f.test_and_set(std::memory_order_acq_rel) == 0); 99 assert(f.test_and_set(std::memory_order_acq_rel) == 1); 100 } 101 { 102 volatile std::atomic_flag f; 103 f.clear(); 104 assert(f.test_and_set(std::memory_order_seq_cst) == 0); 105 assert(f.test_and_set(std::memory_order_seq_cst) == 1); 106 } 107 108 return 0; 109 } 110