1 /* 2 * Copyright (C) 2012 Invensense, Inc. 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 #define CALL_MEMBER_FN(pobject, ptrToMember) ((pobject)->*(ptrToMember)) 26 27 #define MAX_SYSFS_NAME_LEN (100) 28 29 /*****************************************************************************/ 30 31 struct sensors_event_t; 32 33 class SensorBase { 34 protected: 35 const char *dev_name; 36 const char *data_name; 37 char input_name[PATH_MAX]; 38 int dev_fd; 39 int data_fd; 40 41 int openInput(const char* inputName); 42 static int64_t getTimestamp(); timevalToNano(timeval const & t)43 static int64_t timevalToNano(timeval const& t) { 44 return t.tv_sec * 1000000000LL + t.tv_usec * 1000; 45 } 46 47 int open_device(); 48 int close_device(); 49 50 public: 51 SensorBase(const char* dev_name, 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); 60 }; 61 62 /*****************************************************************************/ 63 64 #endif // ANDROID_SENSOR_BASE_H 65