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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2006 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "time_support.h"
/* calculate difference between two struct timeval values */
int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
{
if (x->tv_usec < y->tv_usec) {
int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
y->tv_usec -= 1000000 * nsec;
y->tv_sec += nsec;
}
if (x->tv_usec - y->tv_usec > 1000000) {
int nsec = (x->tv_usec - y->tv_usec) / 1000000;
y->tv_usec += 1000000 * nsec;
y->tv_sec -= nsec;
}
result->tv_sec = x->tv_sec - y->tv_sec;
result->tv_usec = x->tv_usec - y->tv_usec;
/* Return 1 if result is negative. */
return x->tv_sec < y->tv_sec;
}
int timeval_add_time(struct timeval *result, long sec, long usec)
{
result->tv_sec += sec;
result->tv_usec += usec;
while (result->tv_usec > 1000000) {
result->tv_usec -= 1000000;
result->tv_sec++;
}
return 0;
}
/* compare two timevals and return -1/0/+1 accordingly */
int timeval_compare(const struct timeval *x, const struct timeval *y)
{
if (x->tv_sec < y->tv_sec)
return -1;
else if (x->tv_sec > y->tv_sec)
return 1;
else if (x->tv_usec < y->tv_usec)
return -1;
else if (x->tv_usec > y->tv_usec)
return 1;
else
return 0;
}
int duration_start(struct duration *duration)
{
return gettimeofday(&duration->start, NULL);
}
int duration_measure(struct duration *duration)
{
struct timeval end;
int retval = gettimeofday(&end, NULL);
if (retval == 0)
timeval_subtract(&duration->elapsed, &end, &duration->start);
return retval;
}
float duration_elapsed(const struct duration *duration)
{
float t = duration->elapsed.tv_sec;
t += (float)duration->elapsed.tv_usec / 1000000.0;
return t;
}
float duration_kbps(const struct duration *duration, size_t count)
{
return count / (1024.0 * duration_elapsed(duration));
}