2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
31 #ifndef _SYS_EVENTVAR_H_
32 #define _SYS_EVENTVAR_H_
35 #error "no user-serviceable parts inside"
38 #include <sys/_task.h>
40 #define KQ_NEVENTS 8 /* minimize copy{in,out} calls */
41 #define KQEXTENT 256 /* linear growth by this amount */
46 TAILQ_ENTRY(kqueue) kq_list;
47 TAILQ_HEAD(, knote) kq_head; /* list of pending event */
48 int kq_count; /* number of pending events */
49 struct selinfo kq_sel;
50 struct sigio *kq_sigio;
51 struct filedesc *kq_fdp;
55 #define KQ_FLUXWAIT 0x04 /* waiting for a in flux kn */
57 #define KQ_CLOSING 0x10
58 #define KQ_TASKSCHED 0x20 /* task scheduled */
59 #define KQ_TASKDRAIN 0x40 /* waiting for task to drain */
60 int kq_knlistsize; /* size of knlist */
61 struct klist *kq_knlist; /* list of knotes */
62 u_long kq_knhashmask; /* size of knhash */
63 struct klist *kq_knhash; /* hash table for knotes */
65 struct ucred *kq_cred;
68 #endif /* !_SYS_EVENTVAR_H_ */