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Side by Side Diff: content/browser/gamepad/gamepad_provider.h

Issue 8689011: Renderer reading side of gamepad (Closed) Base URL: http://git.chromium.org/chromium/src.git@master
Patch Set: review fixes, some renaming Created 9 years ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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_GAMEPAD_PROVIDER_H_ 5 #ifndef CONTENT_BROWSER_GAMEPAD_PROVIDER_H_
6 #define CONTENT_BROWSER_GAMEPAD_PROVIDER_H_ 6 #define CONTENT_BROWSER_GAMEPAD_PROVIDER_H_
7 7
8 #include "base/memory/scoped_ptr.h" 8 #include "base/memory/scoped_ptr.h"
9 #include "base/memory/weak_ptr.h" 9 #include "base/memory/weak_ptr.h"
10 #include "base/message_loop_proxy.h" 10 #include "base/message_loop_proxy.h"
11 #include "base/shared_memory.h" 11 #include "base/shared_memory.h"
12 #include "base/system_monitor/system_monitor.h" 12 #include "base/system_monitor/system_monitor.h"
13 #include "base/task.h" 13 #include "base/task.h"
14 #include "content/browser/gamepad/data_fetcher.h" 14 #include "content/browser/gamepad/data_fetcher.h"
15 #include "content/common/content_export.h" 15 #include "content/common/content_export.h"
16 #include "content/common/gamepad_hardware_buffer.h" 16 #include "content/common/gamepad_hardware_buffer.h"
17 17
18 namespace base { 18 namespace base {
19 class Thread; 19 class Thread;
20 } 20 }
21 21
22 struct GamepadMsg_Updated_Params; 22 struct GamepadMsg_Updated_Params;
23 23
24 namespace gamepad { 24 namespace content {
25 25
26 class CONTENT_EXPORT Provider : 26 class CONTENT_EXPORT GamepadProvider :
27 public base::RefCountedThreadSafe<Provider>, 27 public base::RefCountedThreadSafe<GamepadProvider>,
28 public base::SystemMonitor::DevicesChangedObserver { 28 public base::SystemMonitor::DevicesChangedObserver {
29 public: 29 public:
30 explicit Provider(DataFetcher* fetcher); 30 explicit GamepadProvider(GamepadDataFetcher* fetcher);
31 31
32 // Starts or Stops the provider. Called from creator_loop_. 32 // Starts or Stops the provider. Called from creator_loop_.
33 void Start(); 33 void Start();
34 void Stop(); 34 void Stop();
35 base::SharedMemoryHandle GetRendererSharedMemoryHandle( 35 base::SharedMemoryHandle GetRendererSharedMemoryHandle(
36 base::ProcessHandle renderer_process); 36 base::ProcessHandle renderer_process);
37 37
38 private: 38 private:
39 friend class base::RefCountedThreadSafe<Provider>; 39 friend class base::RefCountedThreadSafe<GamepadProvider>;
40 40
41 virtual ~Provider(); 41 virtual ~GamepadProvider();
42 42
43 // Method for starting the polling, runs on polling_thread_. 43 // Method for starting the polling, runs on polling_thread_.
44 void DoInitializePollingThread(); 44 void DoInitializePollingThread();
45 45
46 // Method for polling a DataFetcher. Runs on the polling_thread_. 46 // Method for polling a GamepadDataFetcher. Runs on the polling_thread_.
47 void DoPoll(); 47 void DoPoll();
48 void ScheduleDoPoll(); 48 void ScheduleDoPoll();
49 49
50 virtual void OnDevicesChanged() OVERRIDE; 50 virtual void OnDevicesChanged() OVERRIDE;
51 51
52 GamepadHardwareBuffer* SharedMemoryAsHardwareBuffer(); 52 GamepadHardwareBuffer* SharedMemoryAsHardwareBuffer();
53 53
54 enum { kDesiredSamplingIntervalMs = 16 }; 54 enum { kDesiredSamplingIntervalMs = 16 };
55 55
56 // The Message Loop on which this object was created. 56 // The Message Loop on which this object was created.
57 // Typically the I/O loop, but may be something else during testing. 57 // Typically the I/O loop, but may be something else during testing.
58 scoped_refptr<base::MessageLoopProxy> creator_loop_; 58 scoped_refptr<base::MessageLoopProxy> creator_loop_;
59 scoped_ptr<DataFetcher> provided_fetcher_; 59 scoped_ptr<GamepadDataFetcher> provided_fetcher_;
60 60
61 // When polling_thread_ is running, members below are only to be used 61 // When polling_thread_ is running, members below are only to be used
62 // from that thread. 62 // from that thread.
63 scoped_ptr<DataFetcher> data_fetcher_; 63 scoped_ptr<GamepadDataFetcher> data_fetcher_;
64 base::SharedMemory gamepad_shared_memory_; 64 base::SharedMemory gamepad_shared_memory_;
65 bool devices_changed_; 65 bool devices_changed_;
66 66
67 // Polling is done on this background thread. 67 // Polling is done on this background thread.
68 scoped_ptr<base::Thread> polling_thread_; 68 scoped_ptr<base::Thread> polling_thread_;
69 69
70 static Provider* instance_; 70 static GamepadProvider* instance_;
71 base::WeakPtrFactory<Provider> weak_factory_; 71 base::WeakPtrFactory<GamepadProvider> weak_factory_;
72 72
73 DISALLOW_COPY_AND_ASSIGN(Provider); 73 DISALLOW_COPY_AND_ASSIGN(GamepadProvider);
74 }; 74 };
75 75
76 } // namespace gamepad 76 } // namespace content
77 77
78 #endif // CONTENT_BROWSER_GAMEPAD_PROVIDER_H_ 78 #endif // CONTENT_BROWSER_GAMEPAD_PROVIDER_H_
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