1/*-
2 * Copyright (c) 2006 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Compatibility routines for clock_gettime(CLOCK_REALTIME, ...) for systems
29 * that don't have it.  We don't use clockid_t in order to avoid conflicts
30 * with the native OS if it has one but not clock_gettime().  We also assume
31 * that the sys/time.h include has already happened at this point, so we have
32 * access to gettimeofday().
33 */
34#include <errno.h>
35
36#define	CLOCK_REALTIME	0x2d4e1588
37
38static inline int
39clock_gettime(int clock_id, struct timespec *ts)
40{
41	struct timeval tv;
42
43	if (clock_id != CLOCK_REALTIME) {
44		errno = EINVAL;
45		return (-1);
46	}
47	if (gettimeofday(&tv, NULL) < 0)
48		return (-1);
49	ts->tv_sec = tv.tv_sec;
50	ts->tv_nsec = tv.tv_usec * 1000;
51	return (0);
52}
53