1 /* $OpenBSD: evcount.h,v 1.2 2004/09/29 07:37:07 miod Exp $ */
2 /*
3 * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
4 * Copyright (c) 2004 Aaron Campbell <aaron@openbsd.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 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifndef __SYS_EVCOUNT_H__
29 #define __SYS_EVCOUNT_H__
30
31 #ifdef _KERNEL
32
33 #include <sys/queue.h>
34
35 struct evcount {
36 u_int64_t ec_count; /* main counter */
37 int ec_id; /* counter ID */
38 const char *ec_name; /* counter name */
39 struct evcount *ec_parent; /* parent */
40 void *ec_data; /* user data */
41
42 TAILQ_ENTRY(evcount) next;
43 };
44
45 void evcount_attach(struct evcount *, const char *, void *, struct evcount *);
46 void evcount_detach(struct evcount *);
47 int evcount_sysctl(int *, u_int, void *, size_t *, void *, size_t);
48
49 /*
50 * Standard evcount parents.
51 */
52 extern struct evcount evcount_intr;
53
54 #endif /* _KERNEL */
55
56 #endif