1/* $NetBSD: eventvar.h,v 1.8 2008/03/21 21:53:35 ad Exp $ */
2
3/*-
4 * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
5 * 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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * FreeBSD: src/sys/sys/eventvar.h,v 1.4 2000/07/18 19:31:48 jlemon Exp
29 */
30
31/*
32 * This header is provided for the kqueue implementation and kmem
33 * grovellers, and is not expected to be used elsewhere.
34 */
35
36#ifndef _SYS_EVENTVAR_H_
37#define _SYS_EVENTVAR_H_
38
39#include <sys/mutex.h>
40#include <sys/selinfo.h>
41#include <sys/filedesc.h>
42
43#define KQ_NEVENTS 8 /* minimize copy{in,out} calls */
44#define KQ_EXTENT 256 /* linear growth by this amount */
45#define KFILTER_MAXNAME 256 /* maximum size of a filter name */
46#define KFILTER_EXTENT 8 /* grow user_kfilters by this amt */
47
48struct kqueue {
49 TAILQ_HEAD(kqlist, knote) kq_head; /* list of pending event */
50 kmutex_t kq_lock; /* mutex for queue access */
51 filedesc_t *kq_fdp;
52 struct selinfo kq_sel;
53 kcondvar_t kq_cv;
54 int kq_count; /* number of pending events */
55};
56
57#endif /* !_SYS_EVENTVAR_H_ */
58