81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
/*
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* Copyright (c) 2014 Todd C. Miller <Todd.Miller@courtesan.com>
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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 <config.h>
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#if !defined(HAVE_CLOCK_GETTIME)
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#include <sys/types.h>
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#include <sys/time.h>
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#include <errno.h>
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#include <stdio.h>
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#ifdef TIME_WITH_SYS_TIME
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# include <time.h>
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#endif
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#ifndef HAVE_STRUCT_TIMESPEC
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# include "compat/timespec.h"
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#endif
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#include "missing.h"
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#ifdef __MACH__
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# include <mach/mach.h>
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# include <mach/mach_time.h>
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# include <mach/clock.h>
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#endif
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/*
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* Trivial clock_gettime() that supports CLOCK_REALTIME
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* (and CLOCK_MONOTONIC on Mach).
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*/
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int
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clock_gettime(clockid_t clock_id, struct timespec *ts)
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{
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switch (clock_id) {
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#ifdef __MACH__
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case CLOCK_MONOTONIC:
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{
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uint64_t abstime, nsec;
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static mach_timebase_info_data_t timebase_info;
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if (timebase_info.denom == 0)
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(void) mach_timebase_info(&timebase_info);
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abstime = mach_absolute_time();
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nsec = abstime * timebase_info.numer / timebase_info.denom;
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ts->tv_sec = nsec / 1000000000;
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ts->tv_nsec = nsec % 1000000000;
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return 0;
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}
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#endif
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case CLOCK_REALTIME:
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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ts->tv_sec = tv.tv_sec;
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ts->tv_nsec = tv.tv_usec * 1000;
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return 0;
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}
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default:
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errno = EINVAL;
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return -1;
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}
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}
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#endif /* !HAVE_CLOCK_GETTIME */
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