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/*
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* Copyright (c) 1999-2004 Damien Miller <djm@mindrot.org>
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* Copyright (c) 2014 Brent Cook <bcook@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <mach/mach_time.h>
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#include <sys/time.h>
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#include <stdint.h>
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#include <time.h>
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int
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clock_gettime(clockid_t clk_id, struct timespec *ts)
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{
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static uint64_t timebase_factor = 0;
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mach_timebase_info_data_t timebase_info;
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uint64_t nsec;
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if (clk_id != CLOCK_REALTIME)
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return -1; /* not implemented */
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if (timebase_factor == 0) {
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mach_timebase_info(&timebase_info);
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timebase_factor = timebase_info.numer / timebase_info.denom;
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}
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nsec = mach_absolute_time() * timebase_factor;
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ts->tv_sec = nsec / 1000000000UL;
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ts->tv_nsec = nsec % 1000000000UL;
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return 0;
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}
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