1 /* $OpenBSD: wseventvar.h,v 1.10 2019/05/22 18:52:14 anton 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/sigio.h> 75 76 /* 77 * Internal "wscons_event" queue interface for the keyboard and mouse drivers. 78 * The drivers are expected not to place events in the queue above spltty(), 79 * i.e., are expected to run off serial ports or similar devices. 80 */ 81 82 /* WSEVENT_QSIZE should be a power of two so that `%' is fast */ 83 #define WSEVENT_QSIZE 256 /* may need tuning; this uses 2k */ 84 85 struct wseventvar { 86 u_int get; /* get (read) index (modified synchronously) */ 87 volatile u_int put; /* put (write) index (modified by interrupt) */ 88 struct selinfo sel; /* process selecting */ 89 struct sigio_ref sigio; /* async I/O registration */ 90 int wanted; /* wake up on input ready */ 91 int async; /* send SIGIO on input ready */ 92 struct wscons_event *q; /* circular buffer (queue) of events */ 93 }; 94 95 #define splwsevent() spltty() 96 97 #define WSEVENT_WAKEUP(ev) { \ 98 selwakeup(&(ev)->sel); \ 99 if ((ev)->wanted) { \ 100 (ev)->wanted = 0; \ 101 wakeup((caddr_t)(ev)); \ 102 } \ 103 if ((ev)->async) \ 104 pgsigio(&(ev)->sigio, SIGIO, 0); \ 105 } 106 107 int wsevent_init(struct wseventvar *); 108 void wsevent_fini(struct wseventvar *); 109 int wsevent_read(struct wseventvar *, struct uio *, int); 110 int wsevent_poll(struct wseventvar *, int, struct proc *); 111 int wsevent_kqfilter(struct wseventvar *, struct knote *); 112 113 /* 114 * PWSEVENT is set just above PSOCK, which is just above TTIPRI, on the 115 * theory that mouse and keyboard `user' input should be quick. 116 */ 117 #define PWSEVENT 23 118