c47efbc7fd
This allows us to get nanosecond resolution. It also means we use the same time source as utimensat(now) etc. Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #255
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://zfsonlinux.org/>.
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*
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* The SPL 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 the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL 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 the SPL. If not, see <http://www.gnu.org/licenses/>.
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*****************************************************************************
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* Solaris Porting Layer (SPL) Time Implementation.
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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 timespec tspec = current_kernel_time();
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ts->tv_sec = tspec.tv_sec;
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ts->tv_nsec = tspec.tv_nsec;
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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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struct timespec ts;
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do_posix_clock_monotonic_gettime(&ts);
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return (((hrtime_t)ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec);
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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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