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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <config.h>
#include <stdbool.h>
#include <stddef.h> /* NULL */
#include <stdlib.h> /* NULL */
#include <syslog.h>
#include <sys/time.h>
#include <isc/stdtime.h>
#include <isc/util.h>
#ifndef ISC_FIX_TV_USEC
#define ISC_FIX_TV_USEC 1
#endif
#define US_PER_S 1000000
#if ISC_FIX_TV_USEC
static inline void
fix_tv_usec(struct timeval *tv) {
bool fixed = false;
if (tv->tv_usec < 0) {
fixed = true;
do {
tv->tv_sec -= 1;
tv->tv_usec += US_PER_S;
} while (tv->tv_usec < 0);
} else if (tv->tv_usec >= US_PER_S) {
fixed = true;
do {
tv->tv_sec += 1;
tv->tv_usec -= US_PER_S;
} while (tv->tv_usec >=US_PER_S);
}
/*
* Call syslog directly as we are called from the logging functions.
*/
if (fixed)
(void)syslog(LOG_ERR, "gettimeofday returned bad tv_usec: corrected");
}
#endif
void
isc_stdtime_get(isc_stdtime_t *t) {
struct timeval tv;
/*
* Set 't' to the number of seconds since 00:00:00 UTC, January 1,
* 1970.
*/
REQUIRE(t != NULL);
RUNTIME_CHECK(gettimeofday(&tv, NULL) != -1);
#if ISC_FIX_TV_USEC
fix_tv_usec(&tv);
INSIST(tv.tv_usec >= 0);
#else
INSIST(tv.tv_usec >= 0 && tv.tv_usec < US_PER_S);
#endif
*t = (unsigned int)tv.tv_sec;
}
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