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 | |
48 | struct 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 | |