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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_IIO_H_ | |
6 #define DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_IIO_H_ | |
7 | |
8 #include "device/generic_sensor/platform_sensor.h" | |
9 | |
10 #include "base/threading/thread.h" | |
11 #include "base/timer/timer.h" | |
shalamov
2016/10/19 16:37:11
forward declare
maksims (do not use this acc)
2016/10/20 09:50:36
Done.
| |
12 #include "device/generic_sensor/iio/platform_sensor_utils_iio.h" | |
13 #include "device/generic_sensor/iio/sensor_data_iio.h" | |
shalamov
2016/10/19 16:37:11
ditto
maksims (do not use this acc)
2016/10/20 09:50:36
Done.
| |
14 | |
15 namespace base { | |
16 class SingleThreadTaskRunner; | |
17 } | |
18 | |
19 namespace device { | |
20 | |
21 class PlatformSensorIio : public PlatformSensor { | |
22 public: | |
23 PlatformSensorIio(mojom::SensorType type, | |
24 mojo::ScopedSharedBufferMapping mapping, | |
25 PlatformSensorProvider* provider, | |
26 const SensorDataIio& data, | |
27 std::unique_ptr<base::Thread> polling_thread, | |
28 std::unique_ptr<SensorReader> sensor_reader); | |
29 | |
30 // Thread safe. | |
31 mojom::ReportingMode GetReportingMode() override; | |
32 | |
33 protected: | |
34 ~PlatformSensorIio() override; | |
35 bool StartSensor(const PlatformSensorConfiguration& configuration) override; | |
36 void StopSensor() override; | |
37 bool CheckSensorConfiguration( | |
38 const PlatformSensorConfiguration& configuration) override; | |
39 PlatformSensorConfiguration GetDefaultConfiguration() override; | |
40 | |
41 private: | |
42 void BeginPoll(const PlatformSensorConfiguration& configuration); | |
43 void StopPoll(); | |
44 | |
45 // Triggers |sensor_reader_| to read new sensor data. | |
46 // If new data is read, UpdateSensorReading() is called. | |
47 void PollForReadingData(); | |
48 | |
49 // Owned timer to be deleted on a polling thread. | |
50 base::RepeatingTimer* timer_; | |
51 | |
52 const PlatformSensorConfiguration default_configuration_; | |
53 const mojom::ReportingMode reporting_mode_; | |
54 | |
55 // A sensor reader that reads values from sensor files | |
56 // and stores them to a SensorReading structure. | |
57 std::unique_ptr<SensorReader> sensor_reader_; | |
58 | |
59 // A thread that is used to poll sensor data. | |
60 std::unique_ptr<base::Thread> polling_thread_; | |
61 scoped_refptr<base::SingleThreadTaskRunner> polling_thread_task_runner_; | |
62 | |
63 // Stores previously read values that are used to | |
64 // determine whether the recent values are changed | |
65 // and IPC can be notified that updates are available. | |
66 SensorReading old_values_; | |
67 | |
68 base::WeakPtrFactory<PlatformSensorIio> weak_factory_; | |
69 | |
70 DISALLOW_COPY_AND_ASSIGN(PlatformSensorIio); | |
71 }; | |
72 | |
73 } // namespace device | |
74 | |
75 #endif // DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_IIO_H_ | |
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