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Side by Side Diff: device/device_sensors/data_fetcher_shared_memory_base.h

Issue 1164563003: Extract device_sensors to /device via Mojofication (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 6 months ago
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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_DATA_FETCHER_SHARED_MEMORY_BASE_H_ 5 #ifndef DEVICE_DEVICE_SENSORS_DATA_FETCHER_SHARED_MEMORY_BASE_H_
6 #define CONTENT_BROWSER_DEVICE_SENSORS_DATA_FETCHER_SHARED_MEMORY_BASE_H_ 6 #define DEVICE_DEVICE_SENSORS_DATA_FETCHER_SHARED_MEMORY_BASE_H_
7 7
8 #include <map> 8 #include <map>
9 9
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/message_loop/message_loop.h" 12 #include "base/message_loop/message_loop.h"
13 #include "content/browser/device_sensors/inertial_sensor_consts.h" 13 #include "device/device_sensors/device_sensors_export.h"
14 #include "content/common/content_export.h" 14 #include "device/device_sensors/inertial_sensor_consts.h"
15 15
16 namespace content { 16 namespace device {
17 17
18 // Sensor data fetchers should derive from this base class and implement 18 // Sensor data fetchers should derive from this base class and implement
19 // the abstract Start() and Stop() methods. 19 // the abstract Start() and Stop() methods.
20 // If the fetcher requires polling it should also implement IsPolling() 20 // If the fetcher requires polling it should also implement IsPolling()
21 // to return true and the Fetch() method which will be called from the 21 // to return true and the Fetch() method which will be called from the
22 // polling thread to fetch data at regular intervals. 22 // polling thread to fetch data at regular intervals.
23 class CONTENT_EXPORT DataFetcherSharedMemoryBase { 23 class DEVICE_SENSORS_EXPORT DataFetcherSharedMemoryBase {
24 public: 24 public:
25 // Starts updating the shared memory buffer with sensor data at 25 // Starts updating the shared memory buffer with sensor data at
26 // regular intervals. Returns true if the relevant sensors could 26 // regular intervals. Returns true if the relevant sensors could
27 // be successfully activated. 27 // be successfully activated.
28 bool StartFetchingDeviceData(ConsumerType consumer_type); 28 bool StartFetchingDeviceData(ConsumerType consumer_type);
29 29
30 // Stops updating the shared memory buffer. Returns true if the 30 // Stops updating the shared memory buffer. Returns true if the
31 // relevant sensors could be successfully deactivated. 31 // relevant sensors could be successfully deactivated.
32 bool StopFetchingDeviceData(ConsumerType consumer_type); 32 bool StopFetchingDeviceData(ConsumerType consumer_type);
33 33
34 // Should be called before destruction to make sure all active 34 // Should be called before destruction to make sure all active
35 // sensors are unregistered. 35 // sensors are unregistered.
36 virtual void Shutdown(); 36 virtual void Shutdown();
37 37
38 // Returns the shared memory handle of the device sensor data 38 // Returns the shared memory handle of the device sensor data
39 // duplicated into the given process. This method should only be 39 // duplicated into the given process. This method should only be
40 // called after a call to StartFetchingDeviceData method with 40 // called after a call to StartFetchingDeviceData method with
41 // corresponding |consumer_type| parameter. 41 // corresponding |consumer_type| parameter.
42 base::SharedMemoryHandle GetSharedMemoryHandleForProcess( 42 base::SharedMemoryHandle GetSharedMemoryHandleForProcess(
43 ConsumerType consumer_type, base::ProcessHandle process); 43 ConsumerType consumer_type,
44 base::ProcessHandle process);
44 45
45 enum FetcherType { 46 enum FetcherType {
46 // Fetcher runs on the same thread as its creator. 47 // Fetcher runs on the same thread as its creator.
47 FETCHER_TYPE_DEFAULT, 48 FETCHER_TYPE_DEFAULT,
48 // Fetcher runs on a separate thread calling |Fetch()| at regular intervals. 49 // Fetcher runs on a separate thread calling |Fetch()| at regular intervals.
49 FETCHER_TYPE_POLLING_CALLBACK, 50 FETCHER_TYPE_POLLING_CALLBACK,
50 // Fetcher runs on a separate thread, but no callbacks are executed. 51 // Fetcher runs on a separate thread, but no callbacks are executed.
51 FETCHER_TYPE_SEPARATE_THREAD 52 FETCHER_TYPE_SEPARATE_THREAD
52 }; 53 };
53 54
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90 91
91 scoped_ptr<PollingThread> polling_thread_; 92 scoped_ptr<PollingThread> polling_thread_;
92 93
93 // Owning pointers. Objects in the map are deleted in dtor. 94 // Owning pointers. Objects in the map are deleted in dtor.
94 typedef std::map<ConsumerType, base::SharedMemory*> SharedMemoryMap; 95 typedef std::map<ConsumerType, base::SharedMemory*> SharedMemoryMap;
95 SharedMemoryMap shared_memory_map_; 96 SharedMemoryMap shared_memory_map_;
96 97
97 DISALLOW_COPY_AND_ASSIGN(DataFetcherSharedMemoryBase); 98 DISALLOW_COPY_AND_ASSIGN(DataFetcherSharedMemoryBase);
98 }; 99 };
99 100
100 } // namespace content 101 } // namespace device
101 102
102 #endif // CONTENT_BROWSER_DEVICE_SENSORS_DATA_FETCHER_SHARED_MEMORY_BASE_H_ 103 #endif // DEVICE_DEVICE_SENSORS_DATA_FETCHER_SHARED_MEMORY_BASE_H_
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