2 * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/sys/eventvar.h,v 1.1.2.2 2000/07/18 21:49:12 jlemon Exp $
29 #ifndef _SYS_EVENTVAR_H_
30 #define _SYS_EVENTVAR_H_
32 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
33 #error "This file should not be included by userland programs."
37 #include <sys/queue.h>
40 #include <sys/event.h>
42 #ifndef _SYS_THREAD_H_
43 #include <sys/thread.h>
45 #ifndef _SYS_FILEDESC_H_
46 #include <sys/filedesc.h>
50 #define KQ_NEVENTS 32 /* limit stack use */
51 #define KQEXTENT 256 /* linear growth by this amount */
53 TAILQ_HEAD(kqlist, knote);
56 struct kqlist kq_knpend;
57 struct kqlist kq_knlist;
58 int kq_count; /* number of pending events */
59 struct sigio *kq_sigio;
60 struct kqinfo kq_kqinfo;
61 struct filedesc *kq_fdp;
64 struct thread *kq_regtd;
65 u_long kq_knhashmask; /* size of knhash */
66 struct klist *kq_knhash; /* hash table for knotes */
70 #define KQ_REGWAIT 0x08
72 #endif /* !_SYS_EVENTVAR_H_ */