FreeBSD/Linux Kernel Cross Reference
sys/sys/eventvar.h
1 /* $NetBSD: eventvar.h,v 1.5 2005/02/26 22:25:34 perry Exp $ */
2 /*-
3 * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: src/sys/sys/eventvar.h,v 1.4 2000/07/18 19:31:48 jlemon Exp $
28 */
29
30 #ifndef _SYS_EVENTVAR_H_
31 #define _SYS_EVENTVAR_H_
32
33 #define KQ_NEVENTS 8 /* minimize copy{in,out} calls */
34 #define KQ_EXTENT 256 /* linear growth by this amount */
35 #define KFILTER_MAXNAME 256 /* maximum size of a filter name */
36 #define KFILTER_EXTENT 8 /* grow user_kfilters by this amt */
37
38 struct kqueue {
39 TAILQ_HEAD(kqlist, knote) kq_head; /* list of pending event */
40 int kq_count; /* number of pending events */
41 struct simplelock kq_lock; /* mutex for queue access */
42 struct selinfo kq_sel;
43 struct filedesc *kq_fdp;
44 int kq_state;
45 #define KQ_SLEEP 0x01
46 struct kevent kq_kev[KQ_NEVENTS];
47 };
48
49 #endif /* !_SYS_EVENTVAR_H_ */
Cache object: 1dfb95abb7b26e1f2deccc681c2187ae
|