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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H_ | |
| 6 #define CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H_ | |
| 7 | |
| 8 #include <memory> | |
| 9 #include <set> | |
| 10 | |
| 11 #include "base/callback_forward.h" | |
| 12 #include "base/macros.h" | |
| 13 #include "base/memory/shared_memory.h" | |
| 14 #include "base/memory/singleton.h" | |
| 15 #include "base/threading/thread_checker.h" | |
| 16 #include "content/common/content_export.h" | |
| 17 #include "device/gamepad/gamepad_provider.h" | |
| 18 #include "mojo/public/cpp/system/buffer.h" | |
| 19 | |
| 20 namespace blink { | |
| 21 class WebGamepad; | |
| 22 } | |
| 23 | |
| 24 namespace device { | |
| 25 class GamepadConsumer; | |
| 26 class GamepadDataFetcher; | |
| 27 class GamepadProvider; | |
| 28 } | |
| 29 | |
| 30 namespace content { | |
| 31 | |
| 32 class GamepadServiceTestConstructor; | |
| 33 | |
| 34 // Owns the GamepadProvider (the background polling thread) and keeps track of | |
| 35 // the number of consumers currently using the data (and pausing the provider | |
| 36 // when not in use). | |
| 37 class CONTENT_EXPORT GamepadService | |
| 38 : public device::GamepadConnectionChangeClient { | |
| 39 public: | |
| 40 // Returns the GamepadService singleton. | |
| 41 static GamepadService* GetInstance(); | |
| 42 | |
| 43 // Increments the number of users of the provider. The Provider is running | |
| 44 // when there's > 0 users, and is paused when the count drops to 0. | |
| 45 // consumer is registered to listen for gamepad connections. If this is the | |
| 46 // first time it is added to the set of consumers it will be treated | |
| 47 // specially: it will not be informed about connections before a new user | |
| 48 // gesture is observed at which point it will be notified for every connected | |
| 49 // gamepads. | |
| 50 // | |
| 51 // Must be called on the I/O thread. | |
| 52 void ConsumerBecameActive(device::GamepadConsumer* consumer); | |
| 53 | |
| 54 // Decrements the number of users of the provider. consumer will not be | |
| 55 // informed about connections until it's added back via ConsumerBecameActive. | |
| 56 // Must be matched with a ConsumerBecameActive call. | |
| 57 // | |
| 58 // Must be called on the I/O thread. | |
| 59 void ConsumerBecameInactive(device::GamepadConsumer* consumer); | |
| 60 | |
| 61 // Decrements the number of users of the provider and removes consumer from | |
| 62 // the set of consumers. Should be matched with a a ConsumerBecameActive | |
| 63 // call. | |
| 64 // | |
| 65 // Must be called on the I/O thread. | |
| 66 void RemoveConsumer(device::GamepadConsumer* consumer); | |
| 67 | |
| 68 // Registers the given closure for calling when the user has interacted with | |
| 69 // the device. This callback will only be issued once. Should only be called | |
| 70 // while a consumer is active. | |
| 71 void RegisterForUserGesture(const base::Closure& closure); | |
| 72 | |
| 73 // Returns the shared memory handle of the gamepad data duplicated into the | |
| 74 // given process. | |
| 75 base::SharedMemoryHandle GetSharedMemoryHandleForProcess( | |
| 76 base::ProcessHandle handle); | |
| 77 | |
| 78 // Returns a new mojo::ScopedSharedBuffer handle of the gamepad data. | |
| 79 mojo::ScopedSharedBufferHandle GetSharedBufferHandle(); | |
| 80 | |
| 81 // Stop/join with the background thread in GamepadProvider |provider_|. | |
| 82 void Terminate(); | |
| 83 | |
| 84 // Called on IO thread when a gamepad is connected. | |
| 85 void OnGamepadConnected(int index, const blink::WebGamepad& pad); | |
| 86 | |
| 87 // Called on IO thread when a gamepad is disconnected. | |
| 88 void OnGamepadDisconnected(int index, const blink::WebGamepad& pad); | |
| 89 | |
| 90 private: | |
| 91 friend struct base::DefaultSingletonTraits<GamepadService>; | |
| 92 friend class GamepadServiceTestConstructor; | |
| 93 friend class GamepadServiceTest; | |
| 94 | |
| 95 GamepadService(); | |
| 96 | |
| 97 // Constructor for testing. This specifies the data fetcher to use for a | |
| 98 // provider, bypassing the default platform one. | |
| 99 GamepadService( | |
| 100 std::unique_ptr<device::GamepadDataFetcher> fetcher); | |
| 101 | |
| 102 virtual ~GamepadService(); | |
| 103 | |
| 104 static void SetInstance(GamepadService*); | |
| 105 | |
| 106 void OnUserGesture(); | |
| 107 | |
| 108 void OnGamepadConnectionChange(bool connected, | |
| 109 int index, | |
| 110 const blink::WebGamepad& pad) override; | |
| 111 | |
| 112 void SetSanitizationEnabled(bool sanitize); | |
| 113 | |
| 114 struct ConsumerInfo { | |
| 115 ConsumerInfo(device::GamepadConsumer* consumer) | |
| 116 : consumer(consumer), did_observe_user_gesture(false) {} | |
| 117 | |
| 118 bool operator<(const ConsumerInfo& other) const { | |
| 119 return consumer < other.consumer; | |
| 120 } | |
| 121 | |
| 122 device::GamepadConsumer* consumer; | |
| 123 mutable bool is_active; | |
| 124 mutable bool did_observe_user_gesture; | |
| 125 }; | |
| 126 | |
| 127 std::unique_ptr<device::GamepadProvider> provider_; | |
| 128 | |
| 129 base::ThreadChecker thread_checker_; | |
| 130 | |
| 131 typedef std::set<ConsumerInfo> ConsumerSet; | |
| 132 ConsumerSet consumers_; | |
| 133 | |
| 134 int num_active_consumers_; | |
| 135 | |
| 136 bool gesture_callback_pending_; | |
| 137 | |
| 138 DISALLOW_COPY_AND_ASSIGN(GamepadService); | |
| 139 }; | |
| 140 | |
| 141 } // namespace content | |
| 142 | |
| 143 #endif // CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H_ | |
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Chromium Code Reviews
Issue 2563483006:
Move gamepad_service out of content/ and into device/ (Closed)
