SensorService.h revision 94e8f6813f3fb2beaa9bcbfb1ad9b4ae2eb46949
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ANDROID_SENSOR_SERVICE_H 18#define ANDROID_SENSOR_SERVICE_H 19 20#include <stdint.h> 21#include <sys/types.h> 22 23#include <utils/Vector.h> 24#include <utils/SortedVector.h> 25#include <utils/KeyedVector.h> 26#include <utils/threads.h> 27#include <utils/RefBase.h> 28 29#include <binder/BinderService.h> 30#include <binder/Permission.h> 31 32#include <gui/Sensor.h> 33#include <gui/SensorChannel.h> 34#include <gui/ISensorServer.h> 35#include <gui/ISensorEventConnection.h> 36 37// --------------------------------------------------------------------------- 38 39struct sensors_poll_device_t; 40struct sensors_module_t; 41 42namespace android { 43// --------------------------------------------------------------------------- 44 45class SensorService : 46 public BinderService<SensorService>, 47 public BnSensorServer, 48 protected Thread 49{ 50 friend class BinderService<SensorService>; 51 52 static const nsecs_t MINIMUM_EVENTS_PERIOD = 1000000; // 1000 Hz 53 static const nsecs_t DEFAULT_EVENTS_PERIOD = 200000000; // 5 Hz 54 55 SensorService(); 56 virtual ~SensorService(); 57 58 virtual void onFirstRef(); 59 60 // Thread interface 61 virtual bool threadLoop(); 62 63 // ISensorServer interface 64 virtual Vector<Sensor> getSensorList(); 65 virtual sp<ISensorEventConnection> createSensorEventConnection(); 66 virtual status_t dump(int fd, const Vector<String16>& args); 67 68 69 class SensorEventConnection : public BnSensorEventConnection { 70 virtual ~SensorEventConnection(); 71 virtual void onFirstRef(); 72 virtual sp<SensorChannel> getSensorChannel() const; 73 virtual status_t enableDisable(int handle, bool enabled); 74 virtual status_t setEventRate(int handle, nsecs_t ns); 75 76 sp<SensorService> const mService; 77 sp<SensorChannel> const mChannel; 78 79 // protected by SensorService::mLock 80 struct SensorInfo { 81 SensorInfo() : ns(DEFAULT_EVENTS_PERIOD) { } 82 nsecs_t ns; 83 }; 84 DefaultKeyedVector<int32_t, SensorInfo> mSensorInfo; 85 86 public: 87 SensorEventConnection(const sp<SensorService>& service); 88 89 status_t sendEvents(sensors_event_t const* buffer, size_t count, 90 sensors_event_t* scratch = NULL); 91 bool hasSensor(int32_t handle) const; 92 bool hasAnySensor() const; 93 bool addSensor(int32_t handle); 94 bool removeSensor(int32_t handle); 95 status_t setEventRateLocked(int handle, nsecs_t ns); 96 nsecs_t getEventRateForSensor(int32_t handle) const { 97 return mSensorInfo.valueFor(handle).ns; 98 } 99 }; 100 101 class SensorRecord { 102 SortedVector< wp<SensorEventConnection> > mConnections; 103 public: 104 SensorRecord(const sp<SensorEventConnection>& connection); 105 bool addConnection(const sp<SensorEventConnection>& connection); 106 bool removeConnection(const wp<SensorEventConnection>& connection); 107 size_t getNumConnections() const { return mConnections.size(); } 108 }; 109 110 SortedVector< wp<SensorEventConnection> > getActiveConnections() const; 111 String8 getSensorName(int handle) const; 112 status_t recomputeEventsPeriodLocked(int32_t handle); 113 114 void recordLastValue(sensors_event_t const * buffer, size_t count); 115 116 // constants 117 Vector<Sensor> mSensorList; 118 struct sensors_poll_device_t* mSensorDevice; 119 struct sensors_module_t* mSensorModule; 120 Permission mDump; 121 status_t mInitCheck; 122 123 // protected by mLock 124 mutable Mutex mLock; 125 DefaultKeyedVector<int, SensorRecord*> mActiveSensors; 126 SortedVector< wp<SensorEventConnection> > mActiveConnections; 127 128 // The size of this vector is constant, only the items are mutable 129 KeyedVector<int32_t, sensors_event_t> mLastEventSeen; 130 131public: 132 static char const* getServiceName() { return "sensorservice"; } 133 134 void cleanupConnection(const wp<SensorEventConnection>& connection); 135 status_t enable(const sp<SensorEventConnection>& connection, int handle); 136 status_t disable(const sp<SensorEventConnection>& connection, int handle); 137 status_t setEventRate(const sp<SensorEventConnection>& connection, int handle, nsecs_t ns); 138}; 139 140// --------------------------------------------------------------------------- 141}; // namespace android 142 143#endif // ANDROID_SENSOR_SERVICE_H 144