mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-23 19:28:36 +00:00
8f76bb7dad
Release notes at
https://www.nlnetlabs.nl/news/2023/Aug/30/unbound-1.18.0-released/
MFC after: 2 weeks
Merge commit '401770e05c71ecb5ae61a59d316069b4b78bf622' into main
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
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* util/timeval_func.c - helpers to work with struct timeval values.
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*
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* Copyright (c) 2023, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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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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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains helpers to manipulate struct timeval values.
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*/
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#include "config.h"
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#include "timeval_func.h"
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/** subtract timers and the values do not overflow or become negative */
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void
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timeval_subtract(struct timeval* d, const struct timeval* end, const struct timeval* start)
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{
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#ifndef S_SPLINT_S
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time_t end_usec = end->tv_usec;
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d->tv_sec = end->tv_sec - start->tv_sec;
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if(end_usec < start->tv_usec) {
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end_usec += 1000000;
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d->tv_sec--;
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}
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d->tv_usec = end_usec - start->tv_usec;
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#endif
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}
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/** add timers and the values do not overflow or become negative */
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void
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timeval_add(struct timeval* d, const struct timeval* add)
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{
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#ifndef S_SPLINT_S
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d->tv_sec += add->tv_sec;
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d->tv_usec += add->tv_usec;
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if(d->tv_usec >= 1000000 ) {
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d->tv_usec -= 1000000;
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d->tv_sec++;
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}
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#endif
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}
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/** divide sum of timers to get average */
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void
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timeval_divide(struct timeval* avg, const struct timeval* sum, long long d)
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{
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#ifndef S_SPLINT_S
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long long leftover;
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if(d <= 0) {
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avg->tv_sec = 0;
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avg->tv_usec = 0;
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return;
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}
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avg->tv_sec = sum->tv_sec / d;
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avg->tv_usec = sum->tv_usec / d;
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/* handle fraction from seconds divide */
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leftover = sum->tv_sec - avg->tv_sec*d;
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if(leftover <= 0)
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leftover = 0;
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avg->tv_usec += (((long long)leftover)*((long long)1000000))/d;
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if(avg->tv_sec < 0)
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avg->tv_sec = 0;
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if(avg->tv_usec < 0)
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avg->tv_usec = 0;
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#endif
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}
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/** histogram compare of time values */
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int
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timeval_smaller(const struct timeval* x, const struct timeval* y)
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{
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#ifndef S_SPLINT_S
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if(x->tv_sec < y->tv_sec)
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return 1;
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else if(x->tv_sec == y->tv_sec) {
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if(x->tv_usec <= y->tv_usec)
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return 1;
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else return 0;
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}
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else return 0;
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#endif
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}
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