88 lines
3.6 KiB
C
88 lines
3.6 KiB
C
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/* $NetBSD: event_var.h,v 1.1 1996/04/12 02:00:45 cgd Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)event_var.h 8.1 (Berkeley) 6/11/93
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*/
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/*
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* Internal `Firm_event' interface for the keyboard and mouse drivers.
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* The drivers are expected not to place events in the queue above spltty(),
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* i.e., are expected to run off serial ports.
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*/
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/* EV_QSIZE should be a power of two so that `%' is fast */
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#define EV_QSIZE 256 /* may need tuning; this uses 2k */
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struct evvar {
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u_int ev_get; /* get (read) index (modified synchronously) */
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volatile u_int ev_put; /* put (write) index (modified by interrupt) */
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struct selinfo ev_sel; /* process selecting */
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struct proc *ev_io; /* process that opened queue (can get SIGIO) */
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char ev_wanted; /* wake up on input ready */
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char ev_async; /* send SIGIO on input ready */
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struct firm_event *ev_q;/* circular buffer (queue) of events */
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};
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#define splev() spltty()
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#define EV_WAKEUP(ev) { \
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selwakeup(&(ev)->ev_sel); \
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if ((ev)->ev_wanted) { \
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(ev)->ev_wanted = 0; \
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wakeup((caddr_t)(ev)); \
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} \
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if ((ev)->ev_async) \
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psignal((ev)->ev_io, SIGIO); \
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}
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void ev_init __P((struct evvar *));
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void ev_fini __P((struct evvar *));
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int ev_read __P((struct evvar *, struct uio *, int));
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int ev_select __P((struct evvar *, int, struct proc *));
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/*
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* PEVENT is set just above PSOCK, which is just above TTIPRI, on the
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* theory that mouse and keyboard `user' input should be quick.
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*/
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#define PEVENT 23
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