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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: time.c,v 1.16 2020/02/16 21:10:07 florian Exp $ */
/*! \file */
#include <sys/time.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <time.h>
#include <string.h>
#include <isc/time.h>
#include <isc/util.h>
#define NS_PER_S 1000000000 /*%< Nanoseconds per second. */
#define NS_PER_US 1000 /*%< Nanoseconds per microsecond. */
/*
* All of the INSIST()s checks of nanoseconds < NS_PER_S are for
* consistency checking of the type. In lieu of magic numbers, it
* is the best we've got. The check is only performed on functions which
* need an initialized type.
*/
/***
*** Absolute Times
***/
isc_result_t
isc_time_now(struct timespec *t) {
REQUIRE(t != NULL);
if (clock_gettime(CLOCK_REALTIME, t) == -1) {
UNEXPECTED_ERROR(__FILE__, __LINE__, "%s", strerror(errno));
return (ISC_R_UNEXPECTED);
}
return (ISC_R_SUCCESS);
}
uint64_t
isc_time_microdiff(const struct timespec *t1, const struct timespec *t2) {
struct timespec res;
REQUIRE(t1 != NULL && t2 != NULL);
timespecsub(t1, t2, &res);
if (res.tv_sec < 0)
return 0;
return ((res.tv_sec * NS_PER_S + res.tv_nsec) / NS_PER_US);
}
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