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| 1 // Copyright 2016 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 #ifndef BASE_TASK_SCHEDULER_SCHEDULER_LOCK_H |
| 6 #define BASE_TASK_SCHEDULER_SCHEDULER_LOCK_H |
| 7 |
| 8 #include <vector> |
| 9 |
| 10 #include "base/base_export.h" |
| 11 #include "base/macros.h" |
| 12 #include "base/synchronization/lock.h" |
| 13 |
| 14 namespace base { |
| 15 namespace task_scheduler { |
| 16 |
| 17 // A regular lock with simple deadlock correctness checking. |
| 18 // This lock is used throughout the scheduler, and when DCHECK_IS_ON(), tracks |
| 19 // all of the available locks to make sure that any locks are acquired in |
| 20 // an expected order. |
| 21 class BASE_EXPORT SchedulerLock { |
| 22 public: |
| 23 SchedulerLock(); |
| 24 explicit SchedulerLock(const SchedulerLock* predecessor); |
| 25 ~SchedulerLock(); |
| 26 |
| 27 void Acquire(); |
| 28 void Release(); |
| 29 |
| 30 Lock* RawLockForConditionVariable(); |
| 31 |
| 32 private: |
| 33 Lock lock; |
| 34 |
| 35 DISALLOW_COPY_AND_ASSIGN(SchedulerLock); |
| 36 }; |
| 37 |
| 38 class AutoSchedulerLock { |
| 39 public: |
| 40 explicit AutoSchedulerLock(SchedulerLock& lock) : lock_(lock) { |
| 41 lock_.Acquire(); |
| 42 } |
| 43 |
| 44 ~AutoSchedulerLock() { |
| 45 lock_.Release(); |
| 46 } |
| 47 |
| 48 private: |
| 49 SchedulerLock& lock_; |
| 50 DISALLOW_COPY_AND_ASSIGN(AutoSchedulerLock); |
| 51 }; |
| 52 |
| 53 } // namespace task_scheduler |
| 54 } // namespace base |
| 55 |
| 56 #endif // BASE_TASK_SCHEDULER_SCHEDULER_LOCK_H |
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