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 31 #include <gui/Sensor.h> 32 #include <gui/BitTube.h> 33 #include <gui/ISensorServer.h> 34 #include <gui/ISensorEventConnection.h> 35 36 #include "SensorInterface.h" 37 38 // --------------------------------------------------------------------------- 39 40 #define DEBUG_CONNECTIONS false 41 42 struct sensors_poll_device_t; 43 struct sensors_module_t; 44 45 namespace android { 46 // --------------------------------------------------------------------------- 47 48 class SensorService : 49 public BinderService<SensorService>, 50 public BnSensorServer, 51 protected Thread 52 { 53 friend class BinderService<SensorService>; 54 55 static const nsecs_t MINIMUM_EVENTS_PERIOD = 1000000; // 1000 Hz 56 static const char* WAKE_LOCK_NAME; 57 58 SensorService(); 59 virtual ~SensorService(); 60 61 virtual void onFirstRef(); 62 63 // Thread interface 64 virtual bool threadLoop(); 65 66 // ISensorServer interface 67 virtual Vector<Sensor> getSensorList(); 68 virtual sp<ISensorEventConnection> createSensorEventConnection(); 69 virtual status_t dump(int fd, const Vector<String16>& args); 70 71 72 class SensorEventConnection : public BnSensorEventConnection { 73 virtual ~SensorEventConnection(); 74 virtual void onFirstRef(); 75 virtual sp<BitTube> getSensorChannel() const; 76 virtual status_t enableDisable(int handle, bool enabled); 77 virtual status_t setEventRate(int handle, nsecs_t ns); 78 79 sp<SensorService> const mService; 80 sp<BitTube> const mChannel; 81 uid_t mUid; 82 mutable Mutex mConnectionLock; 83 84 // protected by SensorService::mLock 85 SortedVector<int> mSensorInfo; 86 87 public: 88 SensorEventConnection(const sp<SensorService>& service, uid_t uid); 89 90 status_t sendEvents(sensors_event_t const* buffer, size_t count, 91 sensors_event_t* scratch = NULL); 92 bool hasSensor(int32_t handle) const; 93 bool hasAnySensor() const; 94 bool addSensor(int32_t handle); 95 bool removeSensor(int32_t handle); 96 getUid()97 uid_t getUid() const { return mUid; } 98 }; 99 100 class SensorRecord { 101 SortedVector< wp<SensorEventConnection> > mConnections; 102 public: 103 SensorRecord(const sp<SensorEventConnection>& connection); 104 bool addConnection(const sp<SensorEventConnection>& connection); 105 bool removeConnection(const wp<SensorEventConnection>& connection); getNumConnections()106 size_t getNumConnections() const { return mConnections.size(); } 107 }; 108 109 SortedVector< wp<SensorEventConnection> > getActiveConnections() const; 110 DefaultKeyedVector<int, SensorInterface*> getActiveVirtualSensors() const; 111 112 String8 getSensorName(int handle) const; 113 int getSensorType(int handle) const; 114 void recordLastValue(sensors_event_t const * buffer, size_t count); 115 static void sortEventBuffer(sensors_event_t* buffer, size_t count); 116 void registerSensor(SensorInterface* sensor); 117 void registerVirtualSensor(SensorInterface* sensor); 118 status_t cleanupWithoutDisable(const sp<SensorEventConnection>& connection, 119 int handle); 120 void cleanupAutoDisabledSensor(const sp<SensorEventConnection>& connection, 121 sensors_event_t const* buffer, const int count); 122 123 // constants 124 Vector<Sensor> mSensorList; 125 Vector<Sensor> mUserSensorListDebug; 126 Vector<Sensor> mUserSensorList; 127 DefaultKeyedVector<int, SensorInterface*> mSensorMap; 128 Vector<SensorInterface *> mVirtualSensorList; 129 status_t mInitCheck; 130 131 // protected by mLock 132 mutable Mutex mLock; 133 DefaultKeyedVector<int, SensorRecord*> mActiveSensors; 134 DefaultKeyedVector<int, SensorInterface*> mActiveVirtualSensors; 135 SortedVector< wp<SensorEventConnection> > mActiveConnections; 136 137 // The size of this vector is constant, only the items are mutable 138 KeyedVector<int32_t, sensors_event_t> mLastEventSeen; 139 140 public: getServiceName()141 static char const* getServiceName() { return "sensorservice"; } 142 143 void cleanupConnection(SensorEventConnection* connection); 144 status_t enable(const sp<SensorEventConnection>& connection, int handle); 145 status_t disable(const sp<SensorEventConnection>& connection, int handle); 146 status_t setEventRate(const sp<SensorEventConnection>& connection, int handle, nsecs_t ns); 147 }; 148 149 // --------------------------------------------------------------------------- 150 }; // namespace android 151 152 #endif // ANDROID_SENSOR_SERVICE_H 153