1 /* 2 * Copyright (C) 2008 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_BASE_H 18 #define ANDROID_SENSOR_BASE_H 19 20 #include <stdint.h> 21 #include <errno.h> 22 #include <sys/cdefs.h> 23 #include <sys/types.h> 24 25 /*****************************************************************************/ 26 struct sensors_event_t; 27 28 class SensorBase { 29 protected: 30 const char* mDevName; 31 const char* mDataName; 32 char mInputName[PATH_MAX]; 33 int mDevFd; 34 int mDataFd; 35 36 int findTypeByName(const char *name, const char *type); 37 int openInput(const char* inputName); 38 static int64_t getTimestamp(); 39 int openDevice(); 40 int closeDevice(); 41 42 public: 43 SensorBase(const char* dev_name, 44 const char* data_name); 45 46 virtual ~SensorBase(); 47 48 virtual int readEvents(sensors_event_t* data, int count) = 0; 49 virtual bool hasPendingEvents() const; 50 virtual int getFd() const; 51 virtual int setDelay(int32_t handle, int64_t ns); 52 virtual int enable(int32_t handle, int enabled) = 0; 53 }; 54 55 /*****************************************************************************/ 56 57 #endif // ANDROID_SENSOR_BASE_H 58