| Howard Hinnant | 748a527 | 2010-09-30 21:05:29 +0000 | [diff] [blame^] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. 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_consume); |
| 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_release); |
| 44 | assert(f.test_and_set() == 0); |
| 45 | } |
| 46 | { |
| 47 | std::atomic_flag f; |
| 48 | f.test_and_set(); |
| 49 | f.clear(std::memory_order_seq_cst); |
| 50 | assert(f.test_and_set() == 0); |
| 51 | } |
| 52 | { |
| 53 | volatile std::atomic_flag f; |
| 54 | f.test_and_set(); |
| 55 | f.clear(); |
| 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_relaxed); |
| 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_consume); |
| 68 | assert(f.test_and_set() == 0); |
| 69 | } |
| 70 | { |
| 71 | volatile std::atomic_flag f; |
| 72 | f.test_and_set(); |
| 73 | f.clear(std::memory_order_release); |
| 74 | assert(f.test_and_set() == 0); |
| 75 | } |
| 76 | { |
| 77 | volatile std::atomic_flag f; |
| 78 | f.test_and_set(); |
| 79 | f.clear(std::memory_order_seq_cst); |
| 80 | assert(f.test_and_set() == 0); |
| 81 | } |
| 82 | } |