| /***************************************************************************** |
| * |
| * mtdev - Multitouch Protocol Translation Library (MIT license) |
| * |
| * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se> |
| * Copyright (C) 2010 Canonical Ltd. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * |
| ****************************************************************************/ |
| |
| #ifndef MTDEV_EVBUF_H |
| #define MTDEV_EVBUF_H |
| |
| #include "common.h" |
| |
| struct mtdev_evbuf { |
| int head; |
| int tail; |
| struct input_event buffer[DIM_EVENTS]; |
| }; |
| |
| static inline int evbuf_empty(const struct mtdev_evbuf *evbuf) |
| { |
| return evbuf->head == evbuf->tail; |
| } |
| |
| static inline void evbuf_put(struct mtdev_evbuf *evbuf, |
| const struct input_event *ev) |
| { |
| evbuf->buffer[evbuf->head++] = *ev; |
| evbuf->head &= DIM_EVENTS - 1; |
| } |
| |
| static inline void evbuf_get(struct mtdev_evbuf *evbuf, |
| struct input_event *ev) |
| { |
| *ev = evbuf->buffer[evbuf->tail++]; |
| evbuf->tail &= DIM_EVENTS - 1; |
| } |
| |
| #endif |