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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_MESSAGE_FILTER_H_ | |
6 #define CONTENT_BROWSER_MEMORY_MEMORY_MESSAGE_FILTER_H_ | |
7 | |
8 #include "base/macros.h" | |
9 #include "base/memory/memory_pressure_listener.h" | |
10 #include "content/common/content_export.h" | |
11 #include "content/public/browser/browser_message_filter.h" | |
12 #include "content/public/common/process_type.h" | |
13 | |
14 namespace content { | |
15 | |
16 class BrowserChildProcessHost; | |
17 class RenderProcessHost; | |
18 | |
19 // This class sends memory messages from the browser process. | |
20 // See also: child_memory_message_filter.h | |
21 class CONTENT_EXPORT MemoryMessageFilter : public BrowserMessageFilter { | |
22 public: | |
23 MemoryMessageFilter(const BrowserChildProcessHost* child_process_host, | |
24 ProcessType process_type); | |
25 MemoryMessageFilter(const RenderProcessHost* render_process_host); | |
26 | |
27 // BrowserMessageFilter implementation. | |
28 void OnFilterAdded(IPC::Channel* channel) override; | |
29 void OnChannelClosing() override; | |
30 bool OnMessageReceived(const IPC::Message& message) override; | |
31 | |
32 void SendSetPressureNotificationsSuppressed(bool suppressed); | |
33 void SendSimulatePressureNotification( | |
34 base::MemoryPressureListener::MemoryPressureLevel level); | |
35 void SendPressureNotification( | |
36 base::MemoryPressureListener::MemoryPressureLevel level); | |
37 | |
38 protected: | |
39 friend class MemoryPressureControllerImpl; | |
40 | |
41 ~MemoryMessageFilter() override; | |
42 | |
43 const void* process_host() const { return process_host_; } | |
44 ProcessType process_type() const { return process_type_; } | |
45 | |
46 private: | |
47 // The untyped process host and ProcessType associated with this filter | |
48 // instance. The process host is stored as untyped because it is only used as | |
49 // a key in MemoryPressureControllerImpl; at no point is it ever deferenced to | |
50 // invoke any members on a process host. | |
51 const void* process_host_; | |
52 ProcessType process_type_; | |
53 | |
54 DISALLOW_COPY_AND_ASSIGN(MemoryMessageFilter); | |
55 }; | |
56 | |
57 } // namespace content | |
58 | |
59 #endif // CONTENT_BROWSER_MEMORY_MEMORY_MESSAGE_FILTER_H_ | |
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