/* $NetBSD: event_var.h,v 1.1.1.1 1996/01/24 01:15:34 gwr 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. * * from: @(#)event_var.h 8.1 (Berkeley) 6/11/93 * from: Hdr: event_var.h,v 1.5 92/11/26 01:11:51 torek Exp (LBL) */ /* * 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