2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
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.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static char sccsid[] = "@(#)subr.c 8.1 (Berkeley) 6/6/93";
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
43 #include <sys/param.h>
48 #include <sys/ktrace.h>
54 void timevaladd(struct timeval *, struct timeval *);
55 void timevalsub(struct timeval *, struct timeval *);
56 void timevalfix(struct timeval *);
66 facs |= KTRFAC_SYSCALL | KTRFAC_SYSRET;
78 facs |= KTRFAC_STRUCT;
87 facs |= KTRFAC_SYSCTL;
101 timevaladd(struct timeval *t1, struct timeval *t2)
103 t1->tv_sec += t2->tv_sec;
104 t1->tv_usec += t2->tv_usec;
109 timevalsub(struct timeval *t1, struct timeval *t2)
111 t1->tv_sec -= t2->tv_sec;
112 t1->tv_usec -= t2->tv_usec;
117 timevalfix(struct timeval *t1)
119 if (t1->tv_usec < 0) {
121 t1->tv_usec += 1000000;
123 if (t1->tv_usec >= 1000000) {
125 t1->tv_usec -= 1000000;