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_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 
29 struct input_event;
30 
31 class 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 
40 public:
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