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138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/* $NetBSD: time.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_TIME_H_
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#define _LINUX_TIME_H_
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#include <sys/time.h>
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/*
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* XXX get_seconds as implemented by Linux is a Y2038 bug waiting to
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* happen on 32-bit systems because it returns unsigned long. Some
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* callers in Linux (implicitly) convert the result to time_t, though.
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* We'll pretend get_seconds returns time_t and make sure all our
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* callers treat it as if it did.
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*/
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static inline time_t
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get_seconds(void)
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{
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return time_second;
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}
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static inline void
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getrawmonotonic(struct timespec *ts)
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{
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getnanouptime(ts);
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}
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static inline void
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do_gettimeofday(struct timeval *tv)
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{
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microtime(tv);
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}
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static inline bool
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timespec_valid(const struct timespec *ts)
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{
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if (ts->tv_sec < 0)
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return false;
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if (1000000000L <= ts->tv_nsec)
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return false;
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return true;
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}
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static inline struct timespec
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ns_to_timespec(const int64_t nsec)
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{
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struct timespec ts;
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ts.tv_sec = (nsec / 1000000000L);
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ts.tv_nsec = (nsec % 1000000000L);
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if (ts.tv_nsec < 0) {
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ts.tv_sec -= 1;
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ts.tv_nsec += 1000000000L;
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}
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return ts;
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}
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static inline int64_t
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timespec_to_ns(const struct timespec *ts)
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{
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return (((int64_t)ts->tv_sec * 1000000000LL) + ts->tv_nsec);
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}
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static inline struct timeval
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ns_to_timeval(int64_t nsec)
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{
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struct timespec ts;
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struct timeval tv;
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ts = ns_to_timespec(nsec);
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TIMESPEC_TO_TIMEVAL(&tv, &ts);
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return tv;
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}
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static inline int64_t
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timeval_to_ns(struct timeval *tv)
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{
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return (((int64_t)tv->tv_sec * 1000000000UL) + (tv->tv_usec * 1000ul));
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}
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static inline struct timespec
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timespec_sub(struct timespec a, struct timespec b)
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{
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struct timespec d;
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timespecsub(&a, &b, &d);
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return d;
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}
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static inline void
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set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
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{
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while (nsec >= 1000000000L) {
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nsec -= 1000000000L;
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sec += 1;
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}
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while (nsec < 0) {
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nsec += 1000000000L;
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sec -= 1;
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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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#endif /* _LINUX_TIME_H_ */
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