[Vm-dev] Fwd: [Pharo-project] System time

[Eliot Miranda]

On Tue, May 3, 2011 at 7:10 PM, Levente Uzonyi <leves at elte.hu> wrote:

>
> On Tue, 3 May 2011, Eliot Miranda wrote:
>
>  Its because on linux & mac the clock is derived from gettimeofday which is
>> wall time but on Windows it is derived from timeGetTime which isn't. The
>> problem is the lack of a high-resolution wall time on Windows.
>> GetSystemTimeAsFileTime et al have something like 16 ms resolution whereas
>> timeGetTime has 1ms resolution.
>>
>
> On vista the accuracy of GetLocalTime (which is a "friend" of
> GetSystemTimeAsFileTime) seems to be 1ms.


Good.  Time to change.  I'll test this on XP soon.


> E.g.:
>
> s := Set new.
> [ s size < 10 ] whileTrue: [ s add: Win32SystemTime localDateAndTime ].
> s sorted
>
> Output:
>  {2011-05-04T04:03:40.049+02:00 . 2011-05-04T04:03:40.05+02:00 .
> 2011-05-04T04:03:40.051+02:00 . 2011-05-04T04:03:40.052+02:00 .
> 2011-05-04T04:03:40.053+02:00 . 2011-05-04T04:03:40.054+02:00 .
> 2011-05-04T04:03:40.055+02:00 . 2011-05-04T04:03:40.056+02:00 .
> 2011-05-04T04:03:40.057+02:00 . 2011-05-04T04:03:40.058+02:00}
>
>
> Levente
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.squeakfoundation.org/pipermail/vm-dev/attachments/20110503/05fb1d4a/attachment.htm