Annotation of sys/dev/wscons/wseventvar.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: wseventvar.h,v 1.4 2003/06/02 23:28:04 millert 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: /*
! 75: * Internal "wscons_event" queue interface for the keyboard and mouse drivers.
! 76: * The drivers are expected not to place events in the queue above spltty(),
! 77: * i.e., are expected to run off serial ports or similar devices.
! 78: */
! 79:
! 80: /* WSEVENT_QSIZE should be a power of two so that `%' is fast */
! 81: #define WSEVENT_QSIZE 256 /* may need tuning; this uses 2k */
! 82:
! 83: struct wseventvar {
! 84: u_int get; /* get (read) index (modified synchronously) */
! 85: volatile u_int put; /* put (write) index (modified by interrupt) */
! 86: struct selinfo sel; /* process selecting */
! 87: struct proc *io; /* process that opened queue (can get SIGIO) */
! 88: int wanted; /* wake up on input ready */
! 89: int async; /* send SIGIO on input ready */
! 90: struct wscons_event *q; /* circular buffer (queue) of events */
! 91: };
! 92:
! 93: #define splwsevent() spltty()
! 94:
! 95: #define WSEVENT_WAKEUP(ev) { \
! 96: selwakeup(&(ev)->sel); \
! 97: if ((ev)->wanted) { \
! 98: (ev)->wanted = 0; \
! 99: wakeup((caddr_t)(ev)); \
! 100: } \
! 101: if ((ev)->async) \
! 102: pgsignal((ev)->io->p_pgrp, SIGIO, 0); \
! 103: }
! 104:
! 105: void wsevent_init(struct wseventvar *);
! 106: void wsevent_fini(struct wseventvar *);
! 107: int wsevent_read(struct wseventvar *, struct uio *, int);
! 108: int wsevent_poll(struct wseventvar *, int, struct proc *);
! 109:
! 110: /*
! 111: * PWSEVENT is set just above PSOCK, which is just above TTIPRI, on the
! 112: * theory that mouse and keyboard `user' input should be quick.
! 113: */
! 114: #define PWSEVENT 23
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