1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/syscall.h>
29 #include <sys/time.h>
30 #include <sys/vdso.h>
31 #include <errno.h>
32 #include <time.h>
33 #include "libc_private.h"
34
35 int __clock_gettime(clockid_t, struct timespec *ts);
36
37 __weak_reference(__clock_gettime, clock_gettime);
38
39 int
__clock_gettime(clockid_t clock_id,struct timespec * ts)40 __clock_gettime(clockid_t clock_id, struct timespec *ts)
41 {
42 int error;
43
44 if (__vdso_clock_gettime != NULL && __vdso_gettc != NULL)
45 error = __vdso_clock_gettime(clock_id, ts);
46 else
47 error = ENOSYS;
48 if (error == ENOSYS) {
49 error = __sys_clock_gettime(clock_id, ts);
50 } else if (error != 0) {
51 errno = error;
52 error = -1;
53 }
54 return (error);
55 }
56