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/*
* Copyright (c) 2013
* Inferno Nettverk A/S, Norway. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. The above copyright notice, this list of conditions and the following
* disclaimer must appear in all copies of the software, derivative works
* or modified versions, and any portions thereof, aswell as in all
* supporting documentation.
* 2. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* Inferno Nettverk A/S, Norway.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* Inferno Nettverk A/S requests users of this software to return to
*
* Software Distribution Coordinator or sdc@inet.no
* Inferno Nettverk A/S
* Oslo Research Park
* Gaustadallen 21
* NO-0349 Oslo
* Norway
*
* any improvements or extensions that they make and grant Inferno Nettverk A/S
* the rights to redistribute these changes.
*
*/
#include "common.h"
static const char rcsid[] =
"$Id: time.c,v 1.9 2013/10/25 12:55:01 karls Exp $";
time_t
time_monotonic(tloc)
time_t *tloc;
{
struct timeval tnow;
gettimeofday_monotonic(&tnow);
if (tloc != NULL)
*tloc = tnow.tv_sec;
return tnow.tv_sec;
}
struct timeval *
gettimeofday_monotonic(tv)
struct timeval *tv;
{
const char *function = "gettimeofday_monotonic()";
static struct timeval tv_lasttime;
int rc;
#if HAVE_CLOCK_GETTIME_MONOTONIC
struct timespec ts;
rc = clock_gettime(CLOCK_MONOTONIC, &ts);
SASSERT(rc == 0);
SASSERTX(ts.tv_nsec <= 999999999);
/* use timeval for now, so it's usable with timeval-macros. */
tv->tv_sec = ts.tv_sec;
tv->tv_usec = ts.tv_nsec / 1000;
#else /* HAVE_CLOCK_GETTIME_MONOTONIC */
rc = gettimeofday(tv, NULL);
SASSERT(rc == 0);
#endif /* !HAVE_CLOCK_GETTIME_MONOTONIC */
SASSERTX(tv->tv_usec <= 999999);
if (timerisset(&tv_lasttime) && timercmp(tv, &tv_lasttime, <)) {
slog(HAVE_CLOCK_GETTIME_MONOTONIC ? LOG_WARNING : LOG_DEBUG,
"%s: looks like the clock was stepped backwards. "
"Was %ld.%06ld, is %ld.%06ld",
function,
(long)tv_lasttime.tv_sec,
(long)tv_lasttime.tv_usec,
(long)tv->tv_sec,
(long)tv->tv_usec);
*tv = tv_lasttime;
if (tv->tv_usec < 999999)
++tv->tv_usec; /* no idea, but better than nothing. */
}
/*
* for some reason Coverity produces a warning about
* tv_lasttime.tv_usec being uninitialized if we do a struct
* assignment here. :-/
*/
tv_lasttime.tv_sec = tv->tv_sec;
tv_lasttime.tv_usec = tv->tv_usec;
return tv;
}
unsigned long
tv2us(tv)
const struct timeval *tv;
{
return (unsigned long)((tv)->tv_sec * 1000000 + (tv)->tv_usec);
}
struct timeval *
us2tv(us, tv)
const unsigned long us;
struct timeval *tv;
{
if (us < 1000000) {
tv->tv_sec = 0;
tv->tv_usec = us;
}
else {
tv->tv_sec = us / 1000000;
tv->tv_usec = us % 1000000;
}
return tv;
}
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