GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/gen/clock.c Lines: 0 4 0.0 %
Date: 2017-11-13 Branches: 0 2 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: clock.c,v 1.6 2015/01/16 16:48:51 deraadt Exp $ */
2
/*
3
 * Copyright (c) 1989, 1993
4
 *	The Regents of the University of California.  All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 * 1. Redistributions of source code must retain the above copyright
10
 *    notice, this list of conditions and the following disclaimer.
11
 * 2. Redistributions in binary form must reproduce the above copyright
12
 *    notice, this list of conditions and the following disclaimer in the
13
 *    documentation and/or other materials provided with the distribution.
14
 * 3. Neither the name of the University nor the names of its contributors
15
 *    may be used to endorse or promote products derived from this software
16
 *    without specific prior written permission.
17
 *
18
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28
 * SUCH DAMAGE.
29
 */
30
31
#include <sys/time.h>
32
#include <sys/resource.h>
33
34
/*
35
 * Convert usec to clock ticks; could do (usec * CLOCKS_PER_SEC) / 1000000,
36
 * but this would overflow if we switch to nanosec.
37
 */
38
#define	CONVTCK(r)	(r.tv_sec * CLOCKS_PER_SEC + \
39
			 r.tv_usec / (1000000 / CLOCKS_PER_SEC))
40
41
clock_t
42
clock(void)
43
{
44
	struct rusage ru;
45
46
	if (getrusage(RUSAGE_SELF, &ru))
47
		return ((clock_t) -1);
48
	return((clock_t)((CONVTCK(ru.ru_utime) + CONVTCK(ru.ru_stime))));
49
}