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/***************************************************************************
*
* Multitouch X driver
* Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
**************************************************************************/
#ifndef MTDEV_EVBUF_H
#define MTDEV_EVBUF_H
#include "common.h"
struct EventBuffer {
int head;
int tail;
struct input_event buffer[DIM_EVENTS];
};
static inline void evbuf_init(struct EventBuffer *evbuf)
{
memset(evbuf, 0, sizeof(*evbuf));
}
static inline int evbuf_empty(const struct EventBuffer *evbuf)
{
return evbuf->head == evbuf->tail;
}
static inline void evbuf_put(struct EventBuffer *evbuf,
const struct input_event *ev)
{
evbuf->buffer[evbuf->head++] = *ev;
evbuf->head &= DIM_EVENTS - 1;
}
static inline void evbuf_get(struct EventBuffer *evbuf,
struct input_event *ev)
{
*ev = evbuf->buffer[evbuf->tail++];
evbuf->tail &= DIM_EVENTS - 1;
}
#endif
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