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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_TASK_RUNNER_H_ | 5 #ifndef CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_TASK_RUNNER_H_ |
6 #define CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_TASK_RUNNER_H_ | 6 #define CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_TASK_RUNNER_H_ |
7 | 7 |
| 8 #include "base/callback.h" |
8 #include "base/memory/ref_counted.h" | 9 #include "base/memory/ref_counted.h" |
9 #include "base/sequence_checker.h" | 10 #include "base/sequence_checker.h" |
10 #include "base/sequenced_task_runner.h" | 11 #include "base/sequenced_task_runner.h" |
11 #include "base/time/time.h" | 12 #include "base/time/time.h" |
12 #include "content/common/content_export.h" | 13 #include "content/common/content_export.h" |
13 | 14 |
14 namespace content { | 15 namespace content { |
15 | 16 |
16 // DOMStorage uses two task sequences (primary vs commit) to avoid | 17 // DOMStorage uses two task sequences (primary vs commit) to avoid |
17 // primary access from queuing up behind commits to disk. | 18 // primary access from queuing up behind commits to disk. |
18 // * Initialization, shutdown, and administrative tasks are performed as | 19 // * Initialization, shutdown, and administrative tasks are performed as |
19 // shutdown-blocking primary sequence tasks. | 20 // shutdown-blocking primary sequence tasks. |
20 // * Tasks directly related to the javascript'able interface are performed | 21 // * Tasks directly related to the javascript'able interface are performed |
21 // as shutdown-blocking primary sequence tasks. | 22 // as shutdown-blocking primary sequence tasks. |
22 // TODO(michaeln): Skip tasks for reading during shutdown. | 23 // TODO(michaeln): Skip tasks for reading during shutdown. |
23 // * Internal tasks related to committing changes to disk are performed as | 24 // * Internal tasks related to committing changes to disk are performed as |
24 // shutdown-blocking commit sequence tasks. | 25 // shutdown-blocking commit sequence tasks. |
25 class CONTENT_EXPORT DOMStorageTaskRunner | 26 class CONTENT_EXPORT DOMStorageTaskRunner |
26 : public base::TaskRunner { | 27 : public base::TaskRunner { |
27 public: | 28 public: |
28 enum SequenceID { | 29 enum SequenceID { |
29 PRIMARY_SEQUENCE, | 30 PRIMARY_SEQUENCE, |
30 COMMIT_SEQUENCE | 31 COMMIT_SEQUENCE |
31 }; | 32 }; |
32 | 33 |
33 // The PostTask() and PostDelayedTask() methods defined by TaskRunner | 34 // The PostTask() and PostDelayedTask() methods defined by TaskRunner |
34 // post shutdown-blocking tasks on the primary sequence. | 35 // post shutdown-blocking tasks on the primary sequence. |
35 bool PostDelayedTask(const tracked_objects::Location& from_here, | 36 bool PostDelayedTask(const tracked_objects::Location& from_here, |
36 const base::Closure& task, | 37 base::Closure task, |
37 base::TimeDelta delay) override = 0; | 38 base::TimeDelta delay) override = 0; |
38 | 39 |
39 // Posts a shutdown blocking task to |sequence_id|. | 40 // Posts a shutdown blocking task to |sequence_id|. |
40 virtual bool PostShutdownBlockingTask( | 41 virtual bool PostShutdownBlockingTask( |
41 const tracked_objects::Location& from_here, | 42 const tracked_objects::Location& from_here, |
42 SequenceID sequence_id, | 43 SequenceID sequence_id, |
43 const base::Closure& task) = 0; | 44 base::Closure task) = 0; |
44 | 45 |
45 virtual void AssertIsRunningOnPrimarySequence() const = 0; | 46 virtual void AssertIsRunningOnPrimarySequence() const = 0; |
46 virtual void AssertIsRunningOnCommitSequence() const = 0; | 47 virtual void AssertIsRunningOnCommitSequence() const = 0; |
47 | 48 |
48 virtual scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner( | 49 virtual scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner( |
49 SequenceID sequence_id) = 0; | 50 SequenceID sequence_id) = 0; |
50 | 51 |
51 protected: | 52 protected: |
52 ~DOMStorageTaskRunner() override {} | 53 ~DOMStorageTaskRunner() override {} |
53 }; | 54 }; |
54 | 55 |
55 // A DOMStorageTaskRunner which manages a primary and a commit sequence. | 56 // A DOMStorageTaskRunner which manages a primary and a commit sequence. |
56 class CONTENT_EXPORT DOMStorageWorkerPoolTaskRunner : | 57 class CONTENT_EXPORT DOMStorageWorkerPoolTaskRunner : |
57 public DOMStorageTaskRunner { | 58 public DOMStorageTaskRunner { |
58 public: | 59 public: |
59 // |primary_sequence| and |commit_sequence| should have | 60 // |primary_sequence| and |commit_sequence| should have |
60 // TaskShutdownBehaviour::BLOCK_SHUTDOWN semantics. | 61 // TaskShutdownBehaviour::BLOCK_SHUTDOWN semantics. |
61 DOMStorageWorkerPoolTaskRunner( | 62 DOMStorageWorkerPoolTaskRunner( |
62 scoped_refptr<base::SequencedTaskRunner> primary_sequence, | 63 scoped_refptr<base::SequencedTaskRunner> primary_sequence, |
63 scoped_refptr<base::SequencedTaskRunner> commit_sequence); | 64 scoped_refptr<base::SequencedTaskRunner> commit_sequence); |
64 | 65 |
65 bool RunsTasksOnCurrentThread() const override; | 66 bool RunsTasksOnCurrentThread() const override; |
66 | 67 |
67 bool PostDelayedTask(const tracked_objects::Location& from_here, | 68 bool PostDelayedTask(const tracked_objects::Location& from_here, |
68 const base::Closure& task, | 69 base::Closure task, |
69 base::TimeDelta delay) override; | 70 base::TimeDelta delay) override; |
70 | 71 |
71 bool PostShutdownBlockingTask(const tracked_objects::Location& from_here, | 72 bool PostShutdownBlockingTask(const tracked_objects::Location& from_here, |
72 SequenceID sequence_id, | 73 SequenceID sequence_id, |
73 const base::Closure& task) override; | 74 base::Closure task) override; |
74 | 75 |
75 void AssertIsRunningOnPrimarySequence() const override; | 76 void AssertIsRunningOnPrimarySequence() const override; |
76 void AssertIsRunningOnCommitSequence() const override; | 77 void AssertIsRunningOnCommitSequence() const override; |
77 | 78 |
78 scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner( | 79 scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner( |
79 SequenceID sequence_id) override; | 80 SequenceID sequence_id) override; |
80 | 81 |
81 protected: | 82 protected: |
82 ~DOMStorageWorkerPoolTaskRunner() override; | 83 ~DOMStorageWorkerPoolTaskRunner() override; |
83 | 84 |
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95 // all tasks are scheduled on |task_runner| with zero delay. | 96 // all tasks are scheduled on |task_runner| with zero delay. |
96 class CONTENT_EXPORT MockDOMStorageTaskRunner : | 97 class CONTENT_EXPORT MockDOMStorageTaskRunner : |
97 public DOMStorageTaskRunner { | 98 public DOMStorageTaskRunner { |
98 public: | 99 public: |
99 explicit MockDOMStorageTaskRunner( | 100 explicit MockDOMStorageTaskRunner( |
100 scoped_refptr<base::SequencedTaskRunner> task_runner); | 101 scoped_refptr<base::SequencedTaskRunner> task_runner); |
101 | 102 |
102 bool RunsTasksOnCurrentThread() const override; | 103 bool RunsTasksOnCurrentThread() const override; |
103 | 104 |
104 bool PostDelayedTask(const tracked_objects::Location& from_here, | 105 bool PostDelayedTask(const tracked_objects::Location& from_here, |
105 const base::Closure& task, | 106 base::Closure task, |
106 base::TimeDelta delay) override; | 107 base::TimeDelta delay) override; |
107 | 108 |
108 bool PostShutdownBlockingTask(const tracked_objects::Location& from_here, | 109 bool PostShutdownBlockingTask(const tracked_objects::Location& from_here, |
109 SequenceID sequence_id, | 110 SequenceID sequence_id, |
110 const base::Closure& task) override; | 111 base::Closure task) override; |
111 | 112 |
112 void AssertIsRunningOnPrimarySequence() const override; | 113 void AssertIsRunningOnPrimarySequence() const override; |
113 void AssertIsRunningOnCommitSequence() const override; | 114 void AssertIsRunningOnCommitSequence() const override; |
114 | 115 |
115 scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner( | 116 scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner( |
116 SequenceID sequence_id) override; | 117 SequenceID sequence_id) override; |
117 | 118 |
118 protected: | 119 protected: |
119 ~MockDOMStorageTaskRunner() override; | 120 ~MockDOMStorageTaskRunner() override; |
120 | 121 |
121 private: | 122 private: |
122 const scoped_refptr<base::SequencedTaskRunner> task_runner_; | 123 const scoped_refptr<base::SequencedTaskRunner> task_runner_; |
123 | 124 |
124 DISALLOW_COPY_AND_ASSIGN(MockDOMStorageTaskRunner); | 125 DISALLOW_COPY_AND_ASSIGN(MockDOMStorageTaskRunner); |
125 }; | 126 }; |
126 | 127 |
127 } // namespace content | 128 } // namespace content |
128 | 129 |
129 #endif // CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_TASK_RUNNER_H_ | 130 #endif // CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_TASK_RUNNER_H_ |
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