55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
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// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_TASK_COMMON_CHECKED_LOCK_IMPL_H_
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#define BASE_TASK_COMMON_CHECKED_LOCK_IMPL_H_
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#include <memory>
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#include "base/base_export.h"
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#include "base/macros.h"
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#include "base/synchronization/lock.h"
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namespace base {
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class ConditionVariable;
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namespace internal {
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struct UniversalPredecessor {};
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// A regular lock with simple deadlock correctness checking.
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// This lock tracks all of the available locks to make sure that any locks are
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// acquired in an expected order.
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// See scheduler_lock.h for details.
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class BASE_EXPORT CheckedLockImpl {
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public:
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CheckedLockImpl();
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explicit CheckedLockImpl(const CheckedLockImpl* predecessor);
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explicit CheckedLockImpl(UniversalPredecessor);
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~CheckedLockImpl();
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static void AssertNoLockHeldOnCurrentThread();
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void Acquire() EXCLUSIVE_LOCK_FUNCTION(lock_);
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void Release() UNLOCK_FUNCTION(lock_);
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void AssertAcquired() const;
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std::unique_ptr<ConditionVariable> CreateConditionVariable();
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bool is_universal_predecessor() const { return is_universal_predecessor_; }
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private:
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Lock lock_;
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const bool is_universal_predecessor_;
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DISALLOW_COPY_AND_ASSIGN(CheckedLockImpl);
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};
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} // namespace internal
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} // namespace base
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#endif // BASE_TASK_COMMON_CHECKED_LOCK_IMPL_H_
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