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/*
* Ouroboros - Copyright (C) 2016
*
* Time utilities
*
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef OUROBOROS_TIME_UTILS_H
#define OUROBOROS_TIME_UTILS_H
#ifdef MILLION
#undef MILLION
#endif
#ifdef BILLION
#undef BILLION
#endif
#define MILLION 1000000L
#define BILLION 1000000000L
#include <sys/time.h>
#include <limits.h> /* LONG_MAX */
/* functions for timespecs */
#define ts_diff_ns(t0, tx) (((tx)->tv_sec - (t0)->tv_sec) * BILLION \
+ ((tx)->tv_nsec - (t0)->tv_nsec))
#define ts_diff_us(t0, tx) (((tx)->tv_sec - (t0)->tv_sec) * MILLION \
+ ((tx)->tv_nsec - (t0)->tv_nsec) / 1000L)
#define ts_diff_ms(t0, tx) (((tx)->tv_sec - (t0)->tv_sec) * 1000L \
+ ((tx)->tv_nsec - (t0)->tv_nsec) / MILLION)
/* functions for timevals are the same */
#define tv_diff_us(t0, tx) (((tx)->tv_sec - (t0)->tv_sec) * MILLION \
+ ((tx)->tv_usec - (t0)->tv_usec) / 1000L)
#define tv_diff_ms(t0, tx) (((tx)->tv_sec - (t0)->tv_sec) * 1000L \
+ ((tx)->tv_usec - (t0)->tv_usec) / MILLION)
/* functions for timespecs */
int ts_add(const struct timespec * t,
const struct timespec * intv,
struct timespec * res);
int ts_diff(const struct timespec * t,
const struct timespec * intv,
struct timespec * res);
/* functions for timevals */
int tv_add(const struct timeval * t,
const struct timeval * intv,
struct timeval * res);
int tv_diff(const struct timeval * t,
const struct timeval * intv,
struct timeval * res);
/* copying a timeval into a timespec */
int tv_to_ts(const struct timeval * src,
struct timespec * dst);
/* copying a timespec into a timeval (loss of resolution) */
int ts_to_tv(const struct timespec * src,
struct timeval * dst);
#endif /* OUROBOROS_TIME_UTILS_H */
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