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
28struct sensors_event_t;
29
30class SensorBase {
31protected:
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
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
48public:
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