Am 09.12.2011 16:44, schrieb zeljko:
On Friday 09 of December 2011 16:10:54 Sven Barth wrote:
> Am 09.12.2011 15:37, schrieb zeljko:
> > On Friday 09 of December 2011 14:52:56 Sven Barth wrote:
> > > Am 09.12.2011 13:30, schrieb Michael Schnell:
> > > > On 12/09/2011 01:17 PM, Felipe Monteiro de Carvalho wrote:
> > > >> I would like to define it like this: "FPGetTickCount returns the
> > > >>
> > > >> amount of ticks since an unspecified initial time. This initial
> > > >> time
> > > >>
> > > >> is unknown, but is fixed for the entire duration of the
> > > >> application.
> > > >>
> > > >> Ticks are time intervals and all of them have the same duration,
> > > >> but
> > > >>
> > > >> their exact meaning in terms of real world units like milliseconds
> > > >> is
> > > >>
> > > >> unspecified. FPGetTickCount is not affected by timezones and also
> > > >> not
> > > >>
> > > >> by the user changing the system clock." So it matches
> > > >>
> > > >> Windows.GetTickCount well but still is flexible enough to be
> > > >>
> > > >> implemented in other platforms.
> > > >
> > > > What if the PC is polling a time server or similar ? IMHO
> >
> > FPGetTickCount
> >
> > > > should not be affected by such interference. This rules out
using OS
> > > >
> > > > time API calls.
> > >
> > > The description of Felipe mathes Windows' GetTickCount (number of
> > >
> > > milliseconds since system start) and Linux' MONOTONIC_RAW time (or
> > >
> > > however it is called exactly). So I don't see why this should
rule out
> > >
> > > OS time API calls...
> >
> > No, MONOTONIC_RAW is introduced in 2.6.26 afair, so it won't run on
> > older kernels.
>
> My comment was less for which timer type we should support, but more to
> have a argument for what Felipe said.
Ok, also I forgot to mention that MONOTNIC_RAW isn't interrupted by ntp
but MONOTONIC IS so it's big diff.
Yes, Henry wrote that already as well...
Regards,
Sven
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