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51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
// Copyright 2017 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_SEQUENCE_MANAGER_GRACEFUL_QUEUE_SHUTDOWN_HELPER_H_
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#define BASE_TASK_SEQUENCE_MANAGER_GRACEFUL_QUEUE_SHUTDOWN_HELPER_H_
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#include <memory>
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#include <vector>
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#include "base/macros.h"
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#include "base/memory/ref_counted.h"
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#include "base/synchronization/lock.h"
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namespace base {
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namespace sequence_manager {
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namespace internal {
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class TaskQueueImpl;
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// Thread-safe helper to shutdown queues from any thread.
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class GracefulQueueShutdownHelper
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: public RefCountedThreadSafe<GracefulQueueShutdownHelper> {
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public:
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GracefulQueueShutdownHelper();
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void GracefullyShutdownTaskQueue(
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std::unique_ptr<internal::TaskQueueImpl> queue);
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void OnSequenceManagerDeleted();
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std::vector<std::unique_ptr<internal::TaskQueueImpl>> TakeQueues();
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private:
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// This class is ref-counted so it controls its own lifetime.
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~GracefulQueueShutdownHelper();
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friend class RefCountedThreadSafe<GracefulQueueShutdownHelper>;
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Lock lock_;
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bool sequence_manager_deleted_;
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std::vector<std::unique_ptr<internal::TaskQueueImpl>> queues_;
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DISALLOW_COPY_AND_ASSIGN(GracefulQueueShutdownHelper);
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};
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} // namespace internal
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} // namespace sequence_manager
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} // namespace base
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#endif // BASE_TASK_SEQUENCE_MANAGER_GRACEFUL_QUEUE_SHUTDOWN_HELPER_H_
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