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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CONTENT_BROWSER_MEMORY_MEMORY_PRESSURE_CONTROLLER_H_ | |
6 #define CONTENT_BROWSER_MEMORY_MEMORY_PRESSURE_CONTROLLER_H_ | |
7 | |
8 #include <map> | |
9 | |
10 #include "base/callback.h" | |
11 #include "base/macros.h" | |
12 #include "base/memory/memory_pressure_listener.h" | |
13 #include "base/memory/singleton.h" | |
14 #include "content/common/content_export.h" | |
15 | |
16 namespace content { | |
17 | |
18 class BrowserChildProcessHost; | |
19 class MemoryMessageFilter; | |
20 class RenderProcessHost; | |
21 | |
22 class CONTENT_EXPORT MemoryPressureController { | |
23 public: | |
24 // These methods must be called on the IO thread. | |
25 void OnMemoryMessageFilterAdded(MemoryMessageFilter* filter); | |
26 void OnMemoryMessageFilterRemoved(MemoryMessageFilter* filter); | |
27 | |
28 // These methods can be called from any thread. | |
29 void SetPressureNotificationsSuppressedInAllProcesses(bool suppressed); | |
30 void SimulatePressureNotificationInAllProcesses( | |
31 base::MemoryPressureListener::MemoryPressureLevel level); | |
32 void SendPressureNotification( | |
33 const BrowserChildProcessHost* child_process_host, | |
34 base::MemoryPressureListener::MemoryPressureLevel level); | |
35 void SendPressureNotification( | |
36 const RenderProcessHost* render_process_host, | |
37 base::MemoryPressureListener::MemoryPressureLevel level); | |
38 | |
39 // This method can be called from any thread. | |
40 static MemoryPressureController* GetInstance(); | |
41 | |
42 protected: | |
43 virtual ~MemoryPressureController(); | |
44 | |
45 private: | |
46 friend struct base::DefaultSingletonTraits<MemoryPressureController>; | |
47 | |
48 MemoryPressureController(); | |
49 | |
50 // Implementation of the various SendPressureNotification methods. | |
51 void SendPressureNotificationImpl( | |
52 const void* child_process_host, | |
53 base::MemoryPressureListener::MemoryPressureLevel level); | |
54 | |
55 // Map from untyped process host pointers to the associated memory message | |
56 // filters in the browser process. Always accessed on the IO thread. | |
57 typedef std::map<const void*, scoped_refptr<MemoryMessageFilter>> | |
58 MemoryMessageFilterMap; | |
59 MemoryMessageFilterMap memory_message_filters_; | |
60 | |
61 DISALLOW_COPY_AND_ASSIGN(MemoryPressureController); | |
62 }; | |
63 | |
64 } // namespace content | |
65 | |
66 #endif // CONTENT_BROWSER_MEMORY_MEMORY_PRESSURE_CONTROLLER_H_ | |
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