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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_DEVICE_SENSORS_DEVICE_SENSOR_SERVICE_H_ | 5 #ifndef CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_SENSOR_SERVICE_H_ |
6 #define CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_SENSOR_SERVICE_H_ | 6 #define CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_SENSOR_SERVICE_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 | 9 |
10 #include "base/callback_forward.h" | 10 #include "base/callback_forward.h" |
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23 // Owns the data fetcher for Device Motion and Orientation and keeps track of | 23 // Owns the data fetcher for Device Motion and Orientation and keeps track of |
24 // the number of consumers currently using the data. The data fetcher is stopped | 24 // the number of consumers currently using the data. The data fetcher is stopped |
25 // when there are no consumers. | 25 // when there are no consumers. |
26 class CONTENT_EXPORT DeviceSensorService { | 26 class CONTENT_EXPORT DeviceSensorService { |
27 public: | 27 public: |
28 // Returns the DeviceSensorService singleton. | 28 // Returns the DeviceSensorService singleton. |
29 static DeviceSensorService* GetInstance(); | 29 static DeviceSensorService* GetInstance(); |
30 | 30 |
31 // Increments the number of users of the provider. The Provider is running | 31 // Increments the number of users of the provider. The Provider is running |
32 // when there's > 0 users, and is paused when the count drops to 0. | 32 // when there's > 0 users, and is paused when the count drops to 0. |
33 // Must be called on the I/O thread. | 33 // Must be called on a thread that can perform I/O. |
34 void AddConsumer(ConsumerType consumer_type); | 34 void AddConsumer(ConsumerType consumer_type); |
35 | 35 |
36 // Removes a consumer. Should be matched with an AddConsumer call. | 36 // Removes a consumer. Should be matched with an AddConsumer call. |
37 // Must be called on the I/O thread. | 37 // Must be called on a thread that can perform I/O. |
38 void RemoveConsumer(ConsumerType cosumer_type); | 38 void RemoveConsumer(ConsumerType cosumer_type); |
39 | 39 |
40 // Returns the shared memory handle of the device motion data. | 40 // Returns the shared memory handle of the device motion data. |
41 mojo::ScopedSharedBufferHandle GetSharedMemoryHandle( | 41 mojo::ScopedSharedBufferHandle GetSharedMemoryHandle( |
42 ConsumerType consumer_type); | 42 ConsumerType consumer_type); |
43 | 43 |
44 // Stop/join with the background polling thread in |provider_|. | 44 // Stop/join with the background polling thread in |provider_|. Must be |
45 void Shutdown(); | 45 // called on the UI thread. |
| 46 void ShutDownOnUIThread(); |
46 | 47 |
47 // Injects a custom data fetcher for testing purposes. This class takes | 48 // Injects a custom data fetcher for testing purposes. This class takes |
48 // ownership of the injected object. | 49 // ownership of the injected object. |
49 void SetDataFetcherForTesting(DataFetcherSharedMemory* test_data_fetcher); | 50 void SetDataFetcherForTesting(DataFetcherSharedMemory* test_data_fetcher); |
50 | 51 |
51 private: | 52 private: |
52 friend struct base::DefaultSingletonTraits<DeviceSensorService>; | 53 friend struct base::DefaultSingletonTraits<DeviceSensorService>; |
53 | 54 |
54 DeviceSensorService(); | 55 DeviceSensorService(); |
55 virtual ~DeviceSensorService(); | 56 virtual ~DeviceSensorService(); |
56 | 57 |
57 bool ChangeNumberConsumers(ConsumerType consumer_type, int delta); | 58 bool ChangeNumberConsumers(ConsumerType consumer_type, int delta); |
58 int GetNumberConsumers(ConsumerType consumer_type) const; | 59 int GetNumberConsumers(ConsumerType consumer_type) const; |
59 | 60 |
60 int num_light_readers_; | 61 int num_light_readers_; |
61 int num_motion_readers_; | 62 int num_motion_readers_; |
62 int num_orientation_readers_; | 63 int num_orientation_readers_; |
63 int num_orientation_absolute_readers_; | 64 int num_orientation_absolute_readers_; |
64 bool is_shutdown_; | 65 bool is_shutdown_; |
65 std::unique_ptr<DataFetcherSharedMemory> data_fetcher_; | 66 std::unique_ptr<DataFetcherSharedMemory> data_fetcher_; |
66 base::ThreadChecker thread_checker_; | 67 |
| 68 // Associated with the IO thread. |
| 69 base::ThreadChecker io_thread_checker_; |
67 | 70 |
68 DISALLOW_COPY_AND_ASSIGN(DeviceSensorService); | 71 DISALLOW_COPY_AND_ASSIGN(DeviceSensorService); |
69 }; | 72 }; |
70 | 73 |
71 } // namespace content | 74 } // namespace content |
72 | 75 |
73 #endif // CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_SENSOR_SERVICE_H_ | 76 #endif // CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_SENSOR_SERVICE_H_ |
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