1 /* 2 * Copyright (C) 2008-2014 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_INPUT_EVENT_READER_H 18 #define ANDROID_INPUT_EVENT_READER_H 19 20 #include <errno.h> 21 #include <stdint.h> 22 #include <sys/cdefs.h> 23 #include <sys/types.h> 24 25 /*****************************************************************************/ 26 27 struct cw_event { 28 __u8 data[24]; 29 }; 30 31 class InputEventCircularReader 32 { 33 struct cw_event* const mBuffer; 34 struct cw_event* const mBufferEnd; 35 struct cw_event* mHead; 36 struct cw_event* mCurr; 37 ssize_t mFreeSpace; 38 39 public: 40 InputEventCircularReader(size_t numEvents); 41 ~InputEventCircularReader(); 42 ssize_t fill(int fd); 43 ssize_t readEvent(cw_event const** events); 44 void next(); 45 }; 46 47 /*****************************************************************************/ 48 49 #endif // ANDROID_INPUT_EVENT_READER_H 50