[ntp:questions] Start of new GPS 1024 week epoch

Charles Elliott elliott.ch at verizon.net
Wed Aug 21 12:09:39 UTC 2013


> Is SHM supported on Windows?  I know that it /could/ be as the
> mechanisms exist within the OS, but /is/ it?

It is my understanding that it is not; I think I read that in its 
documentation.  I tried it once, but the "receiver" could not find 
an open endpoint.  That does not mean too much though as my Windows 
programming skills have atrophied from meager.

Charles Elliott

> -----Original Message-----
> From: questions-bounces+elliott.ch=verizon.net at lists.ntp.org
> [mailto:questions-bounces+elliott.ch=verizon.net at lists.ntp.org] On
> Behalf Of David Taylor
> Sent: Tuesday, August 20, 2013 10:49 AM
> To: questions at lists.ntp.org
> Subject: Re: [ntp:questions] Start of new GPS 1024 week epoch
> 
> On 20/08/2013 13:25, Martin Burnicki wrote:
> []
> > There were 2 fields in the SHM segment which were previously unused
> and
> > are now used to take the nanoseconds from the refclock and from the
> > system time.
> >
> > Thus programs like gpsd can now write the nanoseconds in addition to
> the
> > microseconds. If there's an old version of ntpd running then it just
> > evaluates the microseconds, but new versions (ntp-dev for now) check
> if
> > the nanoseconds fields are filled up and use them if this is the
> case.
> >
> > Thus an old ntpd works with a new gpsd, and a new ntpd works with an
> old
> > gpsd. See:
> >
> > Bug 1232 - nanosecond support in SHM driver
> > https://bugs.ntp.org/show_bug.cgi?id=1232
> >
> > Martin
> 
> Is SHM supported on Windows?  I know that it /could/ be as the
> mechanisms exist within the OS, but /is/ it?
> --
> Cheers,
> David
> Web: http://www.satsignal.eu
> 
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