1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright (c) 2017, Joyent, Inc.
14 */
15
16
17 #include "thr_uberdata.h"
18 #include <cp_defs.h>
19
20 #pragma weak _gettimeofday = gettimeofday
21
22 extern int __clock_gettime_sys(clockid_t, timespec_t *);
23
24 int
gettimeofday(struct timeval * tv,void * tz __unused)25 gettimeofday(struct timeval *tv, void *tz __unused)
26 {
27 comm_page_t *cp = (comm_page_t *)__uberdata.ub_comm_page;
28
29 /*
30 * Perform a NULL check before attempting to store the result directly.
31 * The old fasttrap logic would perform this same check, but after the
32 * call into hrestime().
33 */
34 if (tv == NULL) {
35 return (0);
36 }
37
38 /*
39 * Since timeval and timespec structs feature the same effective types
40 * and layout of their members, the conversion can be done in-place.
41 */
42 if (cp != NULL && __cp_can_gettime(cp) != 0) {
43 (void) __cp_clock_gettime_realtime(cp, (struct timespec *)tv);
44 } else {
45 (void) __clock_gettime_sys(CLOCK_REALTIME,
46 (struct timespec *)tv);
47 }
48 /* Convert from tv_nsec to tv_usec */
49 tv->tv_usec /= 1000;
50 return (0);
51 }
52