Annotation of sys/dev/wscons/wseventvar.h, Revision 1.1.1.1
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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