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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_RUN_LOOP_H_ | 5 #ifndef BASE_RUN_LOOP_H_ |
6 #define BASE_RUN_LOOP_H_ | 6 #define BASE_RUN_LOOP_H_ |
7 | 7 |
8 #include "base/base_export.h" | 8 #include "base/base_export.h" |
9 #include "base/callback.h" | 9 #include "base/callback.h" |
10 #include "base/memory/weak_ptr.h" | 10 #include "base/memory/weak_ptr.h" |
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24 #endif | 24 #endif |
25 | 25 |
26 // Helper class to Run a nested MessageLoop. Please do not use nested | 26 // Helper class to Run a nested MessageLoop. Please do not use nested |
27 // MessageLoops in production code! If you must, use this class instead of | 27 // MessageLoops in production code! If you must, use this class instead of |
28 // calling MessageLoop::Run/Quit directly. RunLoop::Run can only be called once | 28 // calling MessageLoop::Run/Quit directly. RunLoop::Run can only be called once |
29 // per RunLoop lifetime. Create a RunLoop on the stack and call Run/Quit to run | 29 // per RunLoop lifetime. Create a RunLoop on the stack and call Run/Quit to run |
30 // a nested MessageLoop. | 30 // a nested MessageLoop. |
31 class BASE_EXPORT RunLoop { | 31 class BASE_EXPORT RunLoop { |
32 public: | 32 public: |
33 RunLoop(); | 33 RunLoop(); |
34 #if defined(USE_AURA) | 34 #if defined(OS_WIN) |
35 explicit RunLoop(MessagePumpDispatcher* dispatcher); | 35 explicit RunLoop(MessagePumpDispatcher* dispatcher); |
36 #endif | 36 #endif |
37 ~RunLoop(); | 37 ~RunLoop(); |
38 | 38 |
39 // Run the current MessageLoop. This blocks until Quit is called. Before | 39 // Run the current MessageLoop. This blocks until Quit is called. Before |
40 // calling Run, be sure to grab an AsWeakPtr or the QuitClosure in order to | 40 // calling Run, be sure to grab an AsWeakPtr or the QuitClosure in order to |
41 // stop the MessageLoop asynchronously. MessageLoop::Quit and QuitNow will | 41 // stop the MessageLoop asynchronously. MessageLoop::Quit and QuitNow will |
42 // also trigger a return from Run, but those are deprecated. | 42 // also trigger a return from Run, but those are deprecated. |
43 void Run(); | 43 void Run(); |
44 | 44 |
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86 | 86 |
87 // Return false to abort the Run. | 87 // Return false to abort the Run. |
88 bool BeforeRun(); | 88 bool BeforeRun(); |
89 void AfterRun(); | 89 void AfterRun(); |
90 | 90 |
91 MessageLoop* loop_; | 91 MessageLoop* loop_; |
92 | 92 |
93 // Parent RunLoop or NULL if this is the top-most RunLoop. | 93 // Parent RunLoop or NULL if this is the top-most RunLoop. |
94 RunLoop* previous_run_loop_; | 94 RunLoop* previous_run_loop_; |
95 | 95 |
96 #if defined(USE_AURA) | 96 #if defined(OS_WIN) |
97 MessagePumpDispatcher* dispatcher_; | 97 MessagePumpDispatcher* dispatcher_; |
98 #endif | 98 #endif |
99 | 99 |
100 // Used to count how many nested Run() invocations are on the stack. | 100 // Used to count how many nested Run() invocations are on the stack. |
101 int run_depth_; | 101 int run_depth_; |
102 | 102 |
103 bool run_called_; | 103 bool run_called_; |
104 bool quit_called_; | 104 bool quit_called_; |
105 bool running_; | 105 bool running_; |
106 | 106 |
107 // Used to record that QuitWhenIdle() was called on the MessageLoop, meaning | 107 // Used to record that QuitWhenIdle() was called on the MessageLoop, meaning |
108 // that we should quit Run once it becomes idle. | 108 // that we should quit Run once it becomes idle. |
109 bool quit_when_idle_received_; | 109 bool quit_when_idle_received_; |
110 | 110 |
111 // WeakPtrFactory for QuitClosure safety. | 111 // WeakPtrFactory for QuitClosure safety. |
112 base::WeakPtrFactory<RunLoop> weak_factory_; | 112 base::WeakPtrFactory<RunLoop> weak_factory_; |
113 | 113 |
114 DISALLOW_COPY_AND_ASSIGN(RunLoop); | 114 DISALLOW_COPY_AND_ASSIGN(RunLoop); |
115 }; | 115 }; |
116 | 116 |
117 } // namespace base | 117 } // namespace base |
118 | 118 |
119 #endif // BASE_RUN_LOOP_H_ | 119 #endif // BASE_RUN_LOOP_H_ |
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