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/* $OpenBSD: wseventvar.h,v 1.7 2010/07/26 01:56:27 guenther Exp $ */
/* $NetBSD: wseventvar.h,v 1.1 1998/03/22 14:24:03 drochner Exp $ */
/*
* Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved.
*
* 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 Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* 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. 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 "wscons_event" queue 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 or similar devices.
*/
/* WSEVENT_QSIZE should be a power of two so that `%' is fast */
#define WSEVENT_QSIZE 256 /* may need tuning; this uses 2k */
struct wseventvar {
u_int get; /* get (read) index (modified synchronously) */
volatile u_int put; /* put (write) index (modified by interrupt) */
struct selinfo sel; /* process selecting */
struct process *io; /* process that opened queue (can get SIGIO) */
int wanted; /* wake up on input ready */
int async; /* send SIGIO on input ready */
struct wscons_event *q; /* circular buffer (queue) of events */
};
#define splwsevent() spltty()
#define WSEVENT_WAKEUP(ev) { \
selwakeup(&(ev)->sel); \
if ((ev)->wanted) { \
(ev)->wanted = 0; \
wakeup((caddr_t)(ev)); \
} \
if ((ev)->async) \
pgsignal((ev)->io->ps_pgrp, SIGIO, 0); \
}
void wsevent_init(struct wseventvar *);
void wsevent_fini(struct wseventvar *);
int wsevent_read(struct wseventvar *, struct uio *, int);
int wsevent_poll(struct wseventvar *, int, struct proc *);
/*
* PWSEVENT is set just above PSOCK, which is just above TTIPRI, on the
* theory that mouse and keyboard `user' input should be quick.
*/
#define PWSEVENT 23
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