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util.c
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util.c
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/*
* Copyright (C) 2019 SUSE LLC
*
* This file is part of pgc.
*
* pgc 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; version 2.
*
* pgc 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 pgc. If not, see <https://www.gnu.org/licenses/>.
*/
#include "util.h"
unsigned long ts_diff_ms(struct timespec *start, struct timespec *end)
{
unsigned long ms;
unsigned long ns_end;
ms = (unsigned long)(end->tv_sec - start->tv_sec) * 1000;
if (end->tv_nsec >= start->tv_nsec) {
ns_end = end->tv_nsec;
} else {
ns_end = (unsigned long)(end->tv_nsec) + 1000000000UL;
ms -= 1000;
}
ms += (ns_end - start->tv_nsec + 500000UL) / 1000000UL;
return ms;
}