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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 CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ | 5 #ifndef CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ |
6 #define CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ | 6 #define CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ |
7 | 7 |
8 #include "base/threading/platform_thread.h" | 8 #include "base/memory/ref_counted.h" |
| 9 #include "base/single_thread_task_runner.h" |
9 #include "base/threading/thread.h" | 10 #include "base/threading/thread.h" |
10 #include "content/common/content_export.h" | 11 #include "content/common/content_export.h" |
11 #include "content/public/browser/browser_thread.h" | 12 #include "content/public/browser/browser_thread.h" |
12 | 13 |
13 namespace content { | 14 namespace content { |
14 | 15 |
15 // Very few users should use this directly. To mock BrowserThreads, tests should | 16 // Very few users should use this directly. To mock BrowserThreads, tests should |
16 // use TestBrowserThreadBundle instead. | 17 // use TestBrowserThreadBundle instead. |
17 class CONTENT_EXPORT BrowserThreadImpl : public BrowserThread, | 18 class CONTENT_EXPORT BrowserThreadImpl : public BrowserThread, |
18 public base::Thread { | 19 public base::Thread { |
19 public: | 20 public: |
20 // Construct a BrowserThreadImpl with the supplied identifier. It is an error | 21 // Construct a BrowserThreadImpl with the supplied identifier. It is an error |
21 // to construct a BrowserThreadImpl that already exists. | 22 // to construct a BrowserThreadImpl that already exists. |
22 explicit BrowserThreadImpl(BrowserThread::ID identifier); | 23 explicit BrowserThreadImpl(BrowserThread::ID identifier); |
23 | 24 |
24 // Special constructor for the main (UI) thread and unittests. If a | 25 // Special constructor for the main (UI) thread and unittests. If a |
25 // |message_loop| is provied, we use a dummy thread here since the main | 26 // |message_loop| is provied, we use a dummy thread here since the main |
26 // thread already exists. | 27 // thread already exists. |
27 BrowserThreadImpl(BrowserThread::ID identifier, | 28 BrowserThreadImpl(BrowserThread::ID identifier, |
28 base::MessageLoop* message_loop); | 29 base::MessageLoop* message_loop); |
29 ~BrowserThreadImpl() override; | 30 ~BrowserThreadImpl() override; |
30 | 31 |
31 bool Start(); | 32 bool Start(); |
32 bool StartWithOptions(const Options& options); | 33 bool StartWithOptions(const Options& options); |
33 bool StartAndWaitForTesting(); | 34 bool StartAndWaitForTesting(); |
34 | 35 |
| 36 // Redirects tasks posted to |identifier| to |task_runner|. |task_runner| may |
| 37 // be null to cancel the redirection and have |identifier| enter its |
| 38 // "shutdown" phase. |
| 39 static void RedirectThreadIDToTaskRunner( |
| 40 BrowserThread::ID identifier, |
| 41 scoped_refptr<base::SingleThreadTaskRunner> task_runner); |
| 42 |
35 static void ShutdownThreadPool(); | 43 static void ShutdownThreadPool(); |
36 | 44 |
| 45 // Resets globals for |identifier|. Used in tests to clear global state that |
| 46 // would otherwise leak to the next test. Globals are not otherwise fully |
| 47 // cleaned up in ~BrowserThreadImpl() as there are subtle differences between |
| 48 // UNINITIALIZED and SHUTDOWN state (e.g. globals.task_runners are kept around |
| 49 // on shutdown). Must be called after ~BrowserThreadImpl() for the given |
| 50 // |identifier|. |
| 51 static void ResetGlobalsForTesting(BrowserThread::ID identifier); |
| 52 |
37 protected: | 53 protected: |
38 void Init() override; | 54 void Init() override; |
39 void Run(base::RunLoop* run_loop) override; | 55 void Run(base::RunLoop* run_loop) override; |
40 void CleanUp() override; | 56 void CleanUp() override; |
41 | 57 |
42 private: | 58 private: |
43 // We implement all the functionality of the public BrowserThread | 59 // We implement all the functionality of the public BrowserThread |
44 // functions, but state is stored in the BrowserThreadImpl to keep | 60 // functions, but state is stored in the BrowserThreadImpl to keep |
45 // the API cleaner. Therefore make BrowserThread a friend class. | 61 // the API cleaner. Therefore make BrowserThread a friend class. |
46 friend class BrowserThread; | 62 friend class BrowserThread; |
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71 static void FlushThreadPoolHelperForTesting(); | 87 static void FlushThreadPoolHelperForTesting(); |
72 | 88 |
73 // The identifier of this thread. Only one thread can exist with a given | 89 // The identifier of this thread. Only one thread can exist with a given |
74 // identifier at a given time. | 90 // identifier at a given time. |
75 ID identifier_; | 91 ID identifier_; |
76 }; | 92 }; |
77 | 93 |
78 } // namespace content | 94 } // namespace content |
79 | 95 |
80 #endif // CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ | 96 #endif // CONTENT_BROWSER_BROWSER_THREAD_IMPL_H_ |
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