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