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/* $NetBSD: event_var.h,v 1.2 1994/11/20 20:52:14 deraadt Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)event_var.h 8.1 (Berkeley) 6/11/93
*/
/*
* Internal `Firm_event' interface for the keyboard and mouse drivers.
* The drivers are expected not to place events in the queue above spltty(),
* i.e., are expected to run off serial ports.
*/
/* EV_QSIZE should be a power of two so that `%' is fast */
#define EV_QSIZE 256 /* may need tuning; this uses 2k */
struct evvar {
u_int ev_get; /* get (read) index (modified synchronously) */
volatile u_int ev_put; /* put (write) index (modified by interrupt) */
struct selinfo ev_sel; /* process selecting */
struct proc *ev_io; /* process that opened queue (can get SIGIO) */
char ev_wanted; /* wake up on input ready */
char ev_async; /* send SIGIO on input ready */
struct firm_event *ev_q;/* circular buffer (queue) of events */
};
#define splev() spltty()
#define EV_WAKEUP(ev) { \
selwakeup(&(ev)->ev_sel); \
if ((ev)->ev_wanted) { \
(ev)->ev_wanted = 0; \
wakeup((caddr_t)(ev)); \
} \
if ((ev)->ev_async) \
psignal((ev)->ev_io, SIGIO); \
}
void ev_init __P((struct evvar *));
void ev_fini __P((struct evvar *));
int ev_read __P((struct evvar *, struct uio *, int));
int ev_select __P((struct evvar *, int, struct proc *));
/*
* PEVENT is set just above PSOCK, which is just above TTIPRI, on the
* theory that mouse and keyboard `user' input should be quick.
*/
#define PEVENT 23
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