1/* $OpenBSD: wseventvar.h,v 1.13 2024/03/25 13:01:49 mvs Exp $ */ 2/* $NetBSD: wseventvar.h,v 1.1 1998/03/22 14:24:03 drochner Exp $ */ 3 4/* 5 * Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christopher G. Demetriou 18 * for the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34/* 35 * Copyright (c) 1992, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * This software was developed by the Computer Systems Engineering group 39 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 40 * contributed to Berkeley. 41 * 42 * All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by the University of 45 * California, Lawrence Berkeley Laboratory. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)event_var.h 8.1 (Berkeley) 6/11/93 72 */ 73 74#include <sys/selinfo.h> 75#include <sys/sigio.h> 76 77/* 78 * Internal "wscons_event" queue interface for the keyboard and mouse drivers. 79 * The drivers are expected not to place events in the queue above spltty(), 80 * i.e., are expected to run off serial ports or similar devices. 81 */ 82 83/* WSEVENT_QSIZE should be a power of two so that `%' is fast */ 84#define WSEVENT_QSIZE 256 /* may need tuning; this uses 2k */ 85 86struct wseventvar { 87 u_int ws_get; /* get (read) index (modified 88 synchronously) */ 89 volatile u_int ws_put; /* put (write) index (modified by 90 interrupt) */ 91 struct selinfo ws_sel; /* process selecting */ 92 struct sigio_ref ws_sigio; /* async I/O registration */ 93 int ws_wanted; /* wake up on input ready */ 94 int ws_async; /* send SIGIO on input ready */ 95 struct wscons_event *ws_q; /* circular buffer (queue) of events */ 96}; 97 98#define splwsevent() spltty() 99 100#define WSEVENT_WAKEUP(ev) { \ 101 selwakeup(&(ev)->ws_sel); \ 102 if ((ev)->ws_wanted) { \ 103 (ev)->ws_wanted = 0; \ 104 wakeup((caddr_t)(ev)); \ 105 } \ 106 if ((ev)->ws_async) \ 107 pgsigio(&(ev)->ws_sigio, SIGIO, 0); \ 108} 109 110int wsevent_init(struct wseventvar *); 111void wsevent_fini(struct wseventvar *); 112int wsevent_read(struct wseventvar *, struct uio *, int); 113int wsevent_kqfilter(struct wseventvar *, struct knote *); 114 115/* 116 * PWSEVENT is set just above PSOCK, which is just above TTIPRI, on the 117 * theory that mouse and keyboard `user' input should be quick. 118 */ 119#define PWSEVENT 23 120