| timurrrr@chromium.org | ec4a060 | 2009-10-16 22:09:11 +0900 | [diff] [blame] | 1 | // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "base/atomic_flag.h" |
| 6 | |
| 7 | #include "base/dynamic_annotations.h" |
| 8 | #include "base/logging.h" |
| 9 | |
| 10 | namespace base { |
| 11 | |
| 12 | void AtomicFlag::Set() { |
| 13 | DCHECK(!flag_); |
| 14 | // Set() method can't be called if the flag has already been set. |
| 15 | |
| 16 | ANNOTATE_HAPPENS_BEFORE(&flag_); |
| 17 | base::subtle::Release_Store(&flag_, 1); |
| 18 | } |
| 19 | |
| 20 | bool AtomicFlag::IsSet() const { |
| 21 | bool ret = base::subtle::Acquire_Load(&flag_) != 0; |
| 22 | if (ret) { |
| 23 | ANNOTATE_HAPPENS_AFTER(&flag_); |
| 24 | } |
| 25 | return ret; |
| 26 | } |
| 27 | |
| 28 | } // namespace base |