1 1.10 tsutsui /* $NetBSD: event_var.h,v 1.10 2014/03/21 16:58:54 tsutsui Exp $ */ 2 1.1 oki 3 1.1 oki /* 4 1.1 oki * Copyright (c) 1992, 1993 5 1.1 oki * The Regents of the University of California. All rights reserved. 6 1.1 oki * 7 1.1 oki * This software was developed by the Computer Systems Engineering group 8 1.1 oki * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 1.1 oki * contributed to Berkeley. 10 1.1 oki * 11 1.1 oki * All advertising materials mentioning features or use of this software 12 1.1 oki * must display the following acknowledgement: 13 1.1 oki * This product includes software developed by the University of 14 1.1 oki * California, Lawrence Berkeley Laboratory. 15 1.1 oki * 16 1.1 oki * Redistribution and use in source and binary forms, with or without 17 1.1 oki * modification, are permitted provided that the following conditions 18 1.1 oki * are met: 19 1.1 oki * 1. Redistributions of source code must retain the above copyright 20 1.1 oki * notice, this list of conditions and the following disclaimer. 21 1.1 oki * 2. Redistributions in binary form must reproduce the above copyright 22 1.1 oki * notice, this list of conditions and the following disclaimer in the 23 1.1 oki * documentation and/or other materials provided with the distribution. 24 1.4 agc * 3. Neither the name of the University nor the names of its contributors 25 1.1 oki * may be used to endorse or promote products derived from this software 26 1.1 oki * without specific prior written permission. 27 1.1 oki * 28 1.1 oki * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 1.1 oki * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 1.1 oki * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 1.1 oki * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 1.1 oki * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 1.1 oki * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 1.1 oki * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 1.1 oki * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 1.1 oki * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 1.1 oki * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 1.1 oki * SUCH DAMAGE. 39 1.1 oki * 40 1.1 oki * @(#)event_var.h 8.1 (Berkeley) 6/11/93 41 1.1 oki */ 42 1.1 oki 43 1.1 oki /* 44 1.1 oki * Internal `Firm_event' interface for the keyboard and mouse drivers. 45 1.1 oki * The drivers are expected not to place events in the queue above spltty(), 46 1.1 oki * i.e., are expected to run off serial ports. 47 1.1 oki */ 48 1.1 oki 49 1.1 oki /* EV_QSIZE should be a power of two so that `%' is fast */ 50 1.1 oki #define EV_QSIZE 256 /* may need tuning; this uses 2k */ 51 1.1 oki 52 1.1 oki struct evvar { 53 1.1 oki u_int ev_get; /* get (read) index (modified synchronously) */ 54 1.1 oki volatile u_int ev_put; /* put (write) index (modified by interrupt) */ 55 1.1 oki struct selinfo ev_sel; /* process selecting */ 56 1.1 oki struct proc *ev_io; /* process that opened queue (can get SIGIO) */ 57 1.10 tsutsui bool ev_wanted; /* wake up on input ready */ 58 1.10 tsutsui bool ev_async; /* send SIGIO on input ready */ 59 1.1 oki struct firm_event *ev_q;/* circular buffer (queue) of events */ 60 1.10 tsutsui kmutex_t *ev_lock; /* lock from the parent device */ 61 1.10 tsutsui kcondvar_t ev_cv; /* condvar(9) to delever signal */ 62 1.1 oki }; 63 1.1 oki 64 1.10 tsutsui void ev_init(struct evvar *, const char *, kmutex_t *); 65 1.5 chs void ev_fini(struct evvar *); 66 1.5 chs int ev_read(struct evvar *, struct uio *, int); 67 1.6 christos int ev_select(struct evvar *, int, struct lwp *); 68 1.6 christos int ev_poll(struct evvar *, int, struct lwp *); 69 1.10 tsutsui void ev_wakeup(struct evvar *); 70 1.5 chs int ev_kqfilter(struct evvar *, struct knote *); 71 1.1 oki 72 1.1 oki /* 73 1.1 oki * PEVENT is set just above PSOCK, which is just above TTIPRI, on the 74 1.1 oki * theory that mouse and keyboard `user' input should be quick. 75 1.1 oki */ 76 1.1 oki #define PEVENT 23 77