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/*
* Copyright (c) 2012 Charles Longeau <chl@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 "includes.h"
#ifdef HAVE_MACH_MACH_TIME_H
#include <mach/mach_time.h>
#endif
#include <sys/time.h>
#include <time.h>
#if !defined(HAVE_CLOCK_GETTIME)
int
clock_gettime(int clock_id, struct timespec *tp)
{
int ret = 0;
uint64_t time;
mach_timebase_info_data_t info;
static double scaling_factor = 0;
#if 0
struct timeval tv;
ret = gettimeofday(&tv, NULL);
TIMEVAL_TO_TIMESPEC(&tv, tp);
#endif
/* based on http://code-factor.blogspot.fr/2009/11/monotonic-timers.html */
time = mach_absolute_time();
if (scaling_factor == 0) {
ret = (int) mach_timebase_info(&info);
if (ret != 0)
fatal("mach_timebase_info failed");
scaling_factor = info.numer/info.denom;
}
time *= scaling_factor;
tp->tv_sec = time / 1000000000;
tp->tv_nsec = time % 1000000000;
return (ret);
}
#endif
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