Date: Fri, 17 Oct 2014 00:15:57 +0200 From: Jeremie Le Hen <jlh@FreeBSD.org> To: freebsd-hackers@FreeBSD.org Subject: struct bintime Message-ID: <CAGSa5y2voSswSV4XFVR8%2BOqdftsfPWNSHYiptp-BMJ_hSp5u2A@mail.gmail.com>
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Hi,
I need to get microseconds from a struct bintime. I found
bintime2timeval() in sys/time.h which more or less does this, but I
don't understand how the computation works.
Can someone explain it to me please?
static __inline void
bintime2timeval(const struct bintime *_bt, struct timeval *_tv)
{
_tv->tv_sec = _bt->sec;
_tv->tv_usec = ((uint64_t)1000000 * (uint32_t)(_bt->frac >> 32)) >> 32;
}
Thanks!
--
Jeremie Le Hen
jlh@FreeBSD.org
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