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Side by Side Diff: base/single_thread_task_runner.h

Issue 9997007: Objects that derive from RefCounted/RefCountedThreadSafe should not have public dtors. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: virtual & DISALLOW Created 8 years, 8 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef BASE_SINGLE_THREAD_TASK_RUNNER_H_ 5 #ifndef BASE_SINGLE_THREAD_TASK_RUNNER_H_
6 #define BASE_SINGLE_THREAD_TASK_RUNNER_H_ 6 #define BASE_SINGLE_THREAD_TASK_RUNNER_H_
7 #pragma once 7 #pragma once
8 8
9 #include "base/base_export.h" 9 #include "base/base_export.h"
10 #include "base/sequenced_task_runner.h" 10 #include "base/sequenced_task_runner.h"
11 11
12 namespace base { 12 namespace base {
13 13
14 // A SingleThreadTaskRunner is a SequencedTaskRunner with one more 14 // A SingleThreadTaskRunner is a SequencedTaskRunner with one more
15 // guarantee; namely, that all tasks are run on a single dedicated 15 // guarantee; namely, that all tasks are run on a single dedicated
16 // thread. Most use cases require only a SequencedTaskRunner, unless 16 // thread. Most use cases require only a SequencedTaskRunner, unless
17 // there is a specific need to run tasks on only a single dedicated. 17 // there is a specific need to run tasks on only a single dedicated.
18 // 18 //
19 // Some theoretical implementations of SingleThreadTaskRunner: 19 // Some theoretical implementations of SingleThreadTaskRunner:
20 // 20 //
21 // - A SingleThreadTaskRunner that uses a single worker thread to 21 // - A SingleThreadTaskRunner that uses a single worker thread to
22 // run posted tasks (i.e., a message loop). 22 // run posted tasks (i.e., a message loop).
23 // 23 //
24 // - A SingleThreadTaskRunner that stores the list of posted tasks 24 // - A SingleThreadTaskRunner that stores the list of posted tasks
25 // and has a method Run() that runs each runnable task in FIFO 25 // and has a method Run() that runs each runnable task in FIFO
26 // order that must be run only from the thread the 26 // order that must be run only from the thread the
27 // SingleThreadTaskRunner was created on. 27 // SingleThreadTaskRunner was created on.
28 class BASE_EXPORT SingleThreadTaskRunner : public SequencedTaskRunner { 28 class BASE_EXPORT SingleThreadTaskRunner : public SequencedTaskRunner {
29 public: 29 public:
30 // A more explicit alias to RunsTasksOnCurrentThread(). 30 // A more explicit alias to RunsTasksOnCurrentThread().
31 bool BelongsToCurrentThread() const { 31 bool BelongsToCurrentThread() const {
32 return RunsTasksOnCurrentThread(); 32 return RunsTasksOnCurrentThread();
33 } 33 }
34
35 protected:
36 virtual ~SingleThreadTaskRunner() {}
34 }; 37 };
35 38
36 } // namespace base 39 } // namespace base
37 40
38 #endif // BASE_SERIAL_TASK_RUNNER_H_ 41 #endif // BASE_SERIAL_TASK_RUNNER_H_
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