|
|
- /*
- * Copyright (c) 1999-2004 Damien Miller <djm@mindrot.org>
- * Copyright (c) 2014 Brent Cook <bcook@openbsd.org>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
- #include <mach/mach_time.h>
- #include <sys/time.h>
-
- #include <stdint.h>
- #include <time.h>
-
- int
- clock_gettime(clockid_t clk_id, struct timespec *ts)
- {
- static uint64_t timebase_scale = 0;
- mach_timebase_info_data_t timebase_info;
- uint64_t nsec;
-
- /*
- * Only CLOCK_MONOTONIC is needed by ntpd
- */
- if (clk_id != CLOCK_MONOTONIC)
- return -1;
-
- if (timebase_scale == 0) {
- if (mach_timebase_info(&timebase_info))
- return -1;
- timebase_scale = timebase_info.numer / timebase_info.denom;
- }
-
- nsec = mach_absolute_time() * timebase_scale;
- ts->tv_sec = nsec / 1000000000UL;
- ts->tv_nsec = nsec % 1000000000UL;
-
- return 0;
- }
|
