1/*
2* Copyright (C) 2014 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_INPUT_EVENT_READER_H
18#define ANDROID_INPUT_EVENT_READER_H
19
20#include <stdint.h>
21#include <errno.h>
22#include <sys/cdefs.h>
23#include <sys/types.h>
24
25#include "SensorBase.h"
26
27/*****************************************************************************/
28
29struct input_event;
30
31class InputEventCircularReader
32{
33    struct input_event* const mBuffer;
34    struct input_event* const mBufferEnd;
35    struct input_event* mHead;
36    struct input_event* mCurr;
37    ssize_t mFreeSpace;
38    int mLastFd;
39
40public:
41    InputEventCircularReader(size_t numEvents);
42    ~InputEventCircularReader();
43    ssize_t fill(int fd);
44    ssize_t readEvent(input_event const** events);
45    void next();
46};
47
48/*****************************************************************************/
49
50#endif  // ANDROID_INPUT_EVENT_READER_H
51