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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_INERTIAL_SENSOR_SERVICE_H_ | 5 #ifndef DEVICE_DEVICE_SENSORS_DEVICE_INERTIAL_SENSOR_SERVICE_H_ |
6 #define CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_INERTIAL_SENSOR_SERVICE_H_ | 6 #define DEVICE_DEVICE_SENSORS_DEVICE_INERTIAL_SENSOR_SERVICE_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/callback_forward.h" | 9 #include "base/callback_forward.h" |
10 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
11 #include "base/memory/shared_memory.h" | 11 #include "base/memory/shared_memory.h" |
12 #include "base/memory/singleton.h" | 12 #include "base/memory/singleton.h" |
13 #include "base/threading/thread_checker.h" | 13 #include "base/threading/thread_checker.h" |
14 #include "content/browser/device_sensors/inertial_sensor_consts.h" | 14 #include "device/device_sensors/device_sensors_export.h" |
15 #include "content/common/content_export.h" | 15 #include "device/device_sensors/inertial_sensor_consts.h" |
16 | 16 |
17 namespace content { | 17 namespace device { |
18 | 18 |
19 class DataFetcherSharedMemory; | 19 class DataFetcherSharedMemory; |
20 | 20 |
21 // Owns the data fetcher for Device Motion and Orientation and keeps track of | 21 // Owns the data fetcher for Device Motion and Orientation and keeps track of |
22 // the number of consumers currently using the data. The data fetcher is stopped | 22 // the number of consumers currently using the data. The data fetcher is stopped |
23 // when there are no consumers. | 23 // when there are no consumers. |
24 class CONTENT_EXPORT DeviceInertialSensorService { | 24 class DEVICE_SENSORS_EXPORT DeviceInertialSensorService { |
25 public: | 25 public: |
26 // Returns the DeviceInertialSensorService singleton. | 26 // Returns the DeviceInertialSensorService singleton. |
27 static DeviceInertialSensorService* GetInstance(); | 27 static DeviceInertialSensorService* GetInstance(); |
28 | 28 |
29 // Increments the number of users of the provider. The Provider is running | 29 // Increments the number of users of the provider. The Provider is running |
30 // when there's > 0 users, and is paused when the count drops to 0. | 30 // when there's > 0 users, and is paused when the count drops to 0. |
31 // Must be called on the I/O thread. | 31 // Must be called on the I/O thread. |
32 void AddConsumer(ConsumerType consumer_type); | 32 void AddConsumer(ConsumerType consumer_type); |
33 | 33 |
34 // Removes a consumer. Should be matched with an AddConsumer call. | 34 // Removes a consumer. Should be matched with an AddConsumer call. |
35 // Must be called on the I/O thread. | 35 // Must be called on the I/O thread. |
36 void RemoveConsumer(ConsumerType cosumer_type); | 36 void RemoveConsumer(ConsumerType cosumer_type); |
37 | 37 |
38 // Returns the shared memory handle of the device motion data duplicated | 38 // Returns the shared memory handle of the device motion data duplicated |
39 // into the given process. | 39 // into the given process. |
40 base::SharedMemoryHandle GetSharedMemoryHandleForProcess( | 40 base::SharedMemoryHandle GetSharedMemoryHandleForProcess( |
41 ConsumerType consumer_type, base::ProcessHandle handle); | 41 ConsumerType consumer_type, |
| 42 base::ProcessHandle handle); |
42 | 43 |
43 // Stop/join with the background polling thread in |provider_|. | 44 // Stop/join with the background polling thread in |provider_|. |
44 void Shutdown(); | 45 void Shutdown(); |
45 | 46 |
46 // Injects a custom data fetcher for testing purposes. This class takes | 47 // Injects a custom data fetcher for testing purposes. This class takes |
47 // ownership of the injected object. | 48 // ownership of the injected object. |
48 void SetDataFetcherForTesting(DataFetcherSharedMemory* test_data_fetcher); | 49 void SetDataFetcherForTesting(DataFetcherSharedMemory* test_data_fetcher); |
49 | 50 |
50 private: | 51 private: |
51 friend struct DefaultSingletonTraits<DeviceInertialSensorService>; | 52 friend struct DefaultSingletonTraits<DeviceInertialSensorService>; |
52 | 53 |
53 DeviceInertialSensorService(); | 54 DeviceInertialSensorService(); |
54 virtual ~DeviceInertialSensorService(); | 55 virtual ~DeviceInertialSensorService(); |
55 | 56 |
56 bool ChangeNumberConsumers(ConsumerType consumer_type, | 57 bool ChangeNumberConsumers(ConsumerType consumer_type, int delta); |
57 int delta); | |
58 int GetNumberConsumers(ConsumerType consumer_type) const; | 58 int GetNumberConsumers(ConsumerType consumer_type) const; |
59 | 59 |
60 int num_light_readers_; | 60 int num_light_readers_; |
61 int num_motion_readers_; | 61 int num_motion_readers_; |
62 int num_orientation_readers_; | 62 int num_orientation_readers_; |
63 bool is_shutdown_; | 63 bool is_shutdown_; |
64 scoped_ptr<DataFetcherSharedMemory> data_fetcher_; | 64 scoped_ptr<DataFetcherSharedMemory> data_fetcher_; |
65 base::ThreadChecker thread_checker_; | 65 base::ThreadChecker thread_checker_; |
66 | 66 |
67 DISALLOW_COPY_AND_ASSIGN(DeviceInertialSensorService); | 67 DISALLOW_COPY_AND_ASSIGN(DeviceInertialSensorService); |
68 }; | 68 }; |
69 | 69 |
70 } // namespace content | 70 } // namespace device |
71 | 71 |
72 #endif // CONTENT_BROWSER_DEVICE_SENSORS_DEVICE_INERTIAL_SENSOR_SERVICE_H_ | 72 #endif // DEVICE_DEVICE_SENSORS_DEVICE_INERTIAL_SENSOR_SERVICE_H_ |
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