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 /*****************************************************************************/ 27 28 struct sensors_event_t; 29 30 class SensorBase { 31 protected: 32 const char* dev_name; 33 const char* data_name; 34 int dev_fd; 35 int data_fd; 36 37 static int openInput(const char* inputName); 38 static int64_t getTimestamp(); 39 40 timevalToNano(timeval const & t)41 static int64_t timevalToNano(timeval const& t) { 42 return t.tv_sec*1000000000LL + t.tv_usec*1000; 43 } 44 45 int open_device(); 46 int close_device(); 47 48 public: 49 SensorBase( 50 const char* dev_name, 51 const char* data_name); 52 53 virtual ~SensorBase(); 54 55 virtual int readEvents(sensors_event_t* data, int count) = 0; 56 virtual bool hasPendingEvents() const; 57 virtual int getFd() const; 58 virtual int setDelay(int32_t handle, int64_t ns); 59 virtual int enable(int32_t handle, int enabled) = 0; 60 }; 61 62 /*****************************************************************************/ 63 64 #endif // ANDROID_SENSOR_BASE_H 65