93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/*
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* This file is part of the SPL: Solaris Porting Layer.
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*
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* Copyright (c) 2008 Lawrence Livermore National Security, LLC.
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* Produced at Lawrence Livermore National Laboratory
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* Written by:
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* Brian Behlendorf <behlendorf1@llnl.gov>,
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* Herb Wartens <wartens2@llnl.gov>,
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* Jim Garlick <garlick@llnl.gov>
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* UCRL-CODE-235197
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <sys/sysmacros.h>
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#include <sys/time.h>
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#ifdef HAVE_MONOTONIC_CLOCK
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extern unsigned long long monotonic_clock(void);
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#endif
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#ifdef DEBUG_SUBSYSTEM
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#undef DEBUG_SUBSYSTEM
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#endif
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#define DEBUG_SUBSYSTEM S_TIME
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void
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__gethrestime(timestruc_t *ts)
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{
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struct timeval tv;
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do_gettimeofday(&tv);
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ts->tv_sec = tv.tv_sec;
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ts->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
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}
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EXPORT_SYMBOL(__gethrestime);
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/* Use monotonic_clock() by default. It's faster and is available on older
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* kernels, but few architectures have them, so we must fallback to
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* do_posix_clock_monotonic_gettime().
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*/
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hrtime_t
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__gethrtime(void) {
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#ifdef HAVE_MONOTONIC_CLOCK
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unsigned long long res = monotonic_clock();
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/* Deal with signed/unsigned mismatch */
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return (hrtime_t)(res & ~(1ULL << 63));
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#else
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uint64_t j = get_jiffies_64();
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return (hrtime_t)(j * (NSEC_PER_SEC / HZ));
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#endif
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}
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EXPORT_SYMBOL(__gethrtime);
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/* set_normalized_timespec() API changes
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* 2.6.0 - 2.6.15: Inline function provided by linux/time.h
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* 2.6.16 - 2.6.25: Function prototype defined but not exported
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* 2.6.26 - 2.6.x: Function defined and exported
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*/
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#if !defined(HAVE_SET_NORMALIZED_TIMESPEC_INLINE) && \
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!defined(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT)
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void
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set_normalized_timespec(struct timespec *ts, time_t sec, long nsec)
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{
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while (nsec >= NSEC_PER_SEC) {
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nsec -= NSEC_PER_SEC;
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++sec;
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}
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while (nsec < 0) {
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nsec += NSEC_PER_SEC;
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--sec;
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}
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ts->tv_sec = sec;
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ts->tv_nsec = nsec;
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}
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EXPORT_SYMBOL(set_normalized_timespec);
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#endif
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