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/*
* Ouroboros - Copyright (C) 2016 - 2021
*
* Time utilities
*
* Dimitri Staessens <dimitri@ouroboros.rocks>
* Sander Vrijders <sander@ouroboros.rocks>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef OUROBOROS_TOOLS_TIME_UTILS_H
#define OUROBOROS_TOOLS_TIME_UTILS_H
#ifdef MILLION
#undef MILLION
#endif
#ifdef BILLION
#undef BILLION
#endif
#define MILLION 1000000L
#define BILLION 1000000000L
#include <time.h>
#include <sys/time.h>
/* 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 */
#define ts_add(t, intv, res) \
do { \
time_t nanos = 0; \
nanos = (t)->tv_nsec + (intv)->tv_nsec; \
(res)->tv_sec = (t)->tv_sec + (intv)->tv_sec; \
while (nanos >= BILLION) { \
nanos -= BILLION; \
++((res)->tv_sec); \
} \
(res)->tv_nsec = nanos; \
} while (0);
#define ts_diff(t, intv, res) \
do { \
time_t nanos = 0; \
nanos = (t)->tv_nsec - (intv)->tv_nsec; \
(res)->tv_sec = (t)->tv_sec - (intv)->tv_sec; \
while (nanos < 0) { \
nanos += BILLION; \
--((res)->tv_sec); \
} \
(res)->tv_nsec = nanos; \
} while (0);
/* functions for timevals */
#define tv_add(t, intv, res) \
do { \
time_t micros = 0; \
nanos = (t)->tv_usec + (intv)->tv_usec; \
(res)->tv_sec = (t)->tv_sec + (intv)->tv_sec; \
while (micros >= MILLION) { \
micros -= MILLION; \
++((res)->tv_sec); \
} \
(res)->tv_nsec = nanos; \
} while (0);
#define tv_diff(t, intv, res) \
do { \
time_t micros = 0; \
micros = (t)->tv_usec - (intv)->tv_usec; \
(res)->tv_sec = (t)->tv_sec - (intv)->tv_sec; \
while (micros < 0) { \
micros += MILLION; \
--((res)->tv_sec); \
} \
(res)->tv_usec = micros; \
} while (0);
/* copying a timeval into a timespec */
#define tv_to_ts(tv, ts) \
do { \
(ts)->tv_sec = (tv)->tv_sec; \
(ts)->tv_nsec = (tv)->tv_usec * 1000L; \
} while (0);
/* copying a timespec into a timeval (loss of resolution) */
#define ts_to_tv(ts, tv) \
do { \
(tv)->tv_sec = (ts)->tv_sec; \
(tv)->tv_usec = (ts)->tv_nsec / 1000L; \
} while (0);
#endif /* OUROBOROS_TOOLS_TIME_UTILS_H */
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