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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 DEVICE_GENERIC_SENSOR_PUBLIC_PLATFORM_SENSOR_PROVIDER_LINUX_H_ | 5 #ifndef DEVICE_GENERIC_SENSOR_PUBLIC_PLATFORM_SENSOR_PROVIDER_LINUX_H_ |
6 #define DEVICE_GENERIC_SENSOR_PUBLIC_PLATFORM_SENSOR_PROVIDER_LINUX_H_ | 6 #define DEVICE_GENERIC_SENSOR_PUBLIC_PLATFORM_SENSOR_PROVIDER_LINUX_H_ |
7 | 7 |
8 #include "device/generic_sensor/platform_sensor_provider.h" | 8 #include "device/generic_sensor/platform_sensor_provider.h" |
9 | 9 |
10 #include "device/generic_sensor/platform_sensor_manager_linux.h" | |
11 | |
10 namespace base { | 12 namespace base { |
13 template <typename T> | |
14 struct DefaultSingletonTraits; | |
11 class Thread; | 15 class Thread; |
12 } | 16 } |
13 | 17 |
14 namespace device { | 18 namespace device { |
15 | 19 |
16 struct SensorDataLinux; | 20 struct SensorInfoLinux; |
17 class SensorReader; | |
18 | 21 |
19 class PlatformSensorProviderLinux : public PlatformSensorProvider { | 22 class DEVICE_GENERIC_SENSOR_EXPORT PlatformSensorProviderLinux |
23 : public PlatformSensorProvider, | |
24 public SensorDeviceManager::Delegate { | |
20 public: | 25 public: |
21 PlatformSensorProviderLinux(); | 26 static PlatformSensorProviderLinux* GetInstance(); |
27 | |
28 // Sets another service provided by tests. | |
29 void SetSensorDeviceManagerForTesting( | |
30 std::unique_ptr<SensorDeviceManager> sensor_device_manager); | |
31 | |
32 // Sets task runner for tests. | |
33 void SetFileTaskRunnerForTesting( | |
34 scoped_refptr<base::SingleThreadTaskRunner> task_runner); | |
35 | |
36 protected: | |
22 ~PlatformSensorProviderLinux() override; | 37 ~PlatformSensorProviderLinux() override; |
23 | 38 |
24 static PlatformSensorProviderLinux* GetInstance(); | |
25 | |
26 protected: | |
27 void CreateSensorInternal(mojom::SensorType type, | 39 void CreateSensorInternal(mojom::SensorType type, |
28 mojo::ScopedSharedBufferMapping mapping, | 40 mojo::ScopedSharedBufferMapping mapping, |
29 const CreateSensorCallback& callback) override; | 41 const CreateSensorCallback& callback) override; |
30 | 42 |
31 void AllSensorsRemoved() override; | 43 void AllSensorsRemoved() override; |
32 | 44 |
33 void SetFileTaskRunner( | 45 void SetFileTaskRunner( |
34 scoped_refptr<base::SingleThreadTaskRunner> file_task_runner) override; | 46 scoped_refptr<base::SingleThreadTaskRunner> file_task_runner) override; |
35 | 47 |
36 private: | 48 private: |
37 void SensorReaderFound( | 49 friend struct base::DefaultSingletonTraits<PlatformSensorProviderLinux>; |
50 | |
51 using SensorDeviceMap = | |
52 std::unordered_map<mojom::SensorType, std::unique_ptr<SensorInfoLinux>>; | |
53 | |
54 PlatformSensorProviderLinux(); | |
55 | |
56 void SensorDeviceFound( | |
38 mojom::SensorType type, | 57 mojom::SensorType type, |
39 mojo::ScopedSharedBufferMapping mapping, | 58 mojo::ScopedSharedBufferMapping mapping, |
40 const PlatformSensorProviderBase::CreateSensorCallback& callback, | 59 const PlatformSensorProviderBase::CreateSensorCallback& callback, |
41 const SensorDataLinux& data, | 60 SensorInfoLinux* sensor_device); |
42 std::unique_ptr<SensorReader> sensor_reader); | 61 |
62 bool StartPollingThread(); | |
43 | 63 |
44 // Stops a polling thread if there are no sensors left. Must be called on | 64 // Stops a polling thread if there are no sensors left. Must be called on |
45 // a different that polling thread that allows io. | 65 // a different than the polling thread which allows I/O. |
46 void StopPollingThread(); | 66 void StopPollingThread(); |
47 | 67 |
48 // TODO(maksims): make a separate class Manager that will | 68 // Initializes a sensor device manager. |
49 // create provide sensors with a polling task runner, check sensors existence | 69 bool InitializeSenorDeviceManager(); |
50 // and notify provider if a new sensor has appeared and it can be created if a | 70 |
51 // request comes again for the same sensor. | 71 // Shutdowns a service that tracks events from iio subsystem. |
Reilly Grant (use Gerrit)
2016/12/08 02:31:15
s/Shutdowns/Shuts down/
maksims (do not use this acc)
2016/12/08 18:39:17
Done.
| |
52 // A use case example: a request for a sensor X comes, manager checks if the | 72 void Shutdown(); |
53 // sensor exists on a platform and notifies a provider it is not found. | 73 |
54 // The provider stores this information into its cache and doesn't try to | 74 // Returns SensorInfoLinux structure of a requested type. |
55 // create this specific sensor if a request comes. But when, for example, | 75 // If a request cannot be processed immediately, returns nullptr and |
56 // the sensor X is plugged into a usb port, the manager notices that and | 76 // all the requests stored in |requests_map_| are processed after |
57 // notifies the provider, which updates its cache and starts handling requests | 77 // enumeration is ready. |
58 // for the sensor X. | 78 SensorInfoLinux* GetSensorDevice(mojom::SensorType type); |
59 // | 79 |
60 // Right now, this thread is used to find sensors files and poll data. | 80 // Returns all found iio devices. Currently not implemented. |
81 void GetAllSensorDevices(); | |
82 | |
83 // Processed stored requests in |request_map_|. | |
84 void ProcessStoredRequests(); | |
85 | |
86 // Called when sensors are created asynchronously after enumeration is done. | |
87 void CreateSensorAndNotify(mojom::SensorType type, | |
88 SensorInfoLinux* sensor_device); | |
89 | |
90 bool enumeration_ready() { return enumeration_ready_; } | |
91 | |
92 bool sensor_device_manager_started() { | |
93 return sensor_device_manager_started_; | |
94 } | |
95 | |
96 // SensorDeviceManager::Delegate implements: | |
97 void OnEnumerationReady() override; | |
98 void OnDeviceAdded(mojom::SensorType type, | |
99 std::unique_ptr<SensorInfoLinux> sensor_device) override; | |
100 void OnDeviceRemoved(mojom::SensorType type, | |
101 const std::string& device_node) override; | |
102 | |
103 // Set to true when enumeration is ready. | |
104 bool enumeration_ready_; | |
105 | |
106 // Set to true when |sensor_device_manager_| has been started. | |
107 bool sensor_device_manager_started_; | |
108 | |
109 // Stores all available sensor devices by type. | |
110 SensorDeviceMap sensor_devices_by_type_; | |
111 | |
112 // A thread that is used by sensor readers in case of polling strategy. | |
61 std::unique_ptr<base::Thread> polling_thread_; | 113 std::unique_ptr<base::Thread> polling_thread_; |
62 | 114 |
63 // A task runner that is passed to polling sensors to poll data. | 115 // This manager is being used to get |SensorInfoLinux|, which represents |
64 scoped_refptr<base::SingleThreadTaskRunner> polling_thread_task_runner_; | 116 // all the information of a concrete sensor provided by OS. |
117 std::unique_ptr<SensorDeviceManager> sensor_device_manager_; | |
65 | 118 |
66 // Browser's file thread task runner passed from renderer. Used to | 119 // Browser's file thread task runner passed from renderer. Used by this |
67 // stop a polling thread. | 120 // provider to stop a polling thread and passed to a manager that |
121 // runs a linux device monitor service on this task runner. | |
68 scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_; | 122 scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_; |
69 | 123 |
70 DISALLOW_COPY_AND_ASSIGN(PlatformSensorProviderLinux); | 124 DISALLOW_COPY_AND_ASSIGN(PlatformSensorProviderLinux); |
71 }; | 125 }; |
72 | 126 |
73 } // namespace device | 127 } // namespace device |
74 | 128 |
75 #endif // DEVICE_GENERIC_SENSOR_PUBLIC_PLATFORM_SENSOR_PROVIDER_LINUX_H_ | 129 #endif // DEVICE_GENERIC_SENSOR_PUBLIC_PLATFORM_SENSOR_PROVIDER_LINUX_H_ |
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