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Date: Wed, 3 Aug 2016 19:42:43 -0700 (PDT)
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Subject: Re: Win32. Task or CreateThread
From: George J <ivanov_george@list.ru>
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Xref: news.eternal-september.org comp.lang.ada:31280
Date: 2016-08-03T19:42:43-07:00
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=D1=81=D1=80=D0=B5=D0=B4=D0=B0, 3 =D0=B0=D0=B2=D0=B3=D1=83=D1=81=D1=82=D0=
=B0 2016 =D0=B3., 22:43:25 UTC+3 =D0=BF=D0=BE=D0=BB=D1=8C=D0=B7=D0=BE=D0=B2=
=D0=B0=D1=82=D0=B5=D0=BB=D1=8C Dmitry A. Kazakov =D0=BD=D0=B0=D0=BF=D0=B8=
=D1=81=D0=B0=D0=BB:
> On 2016-08-03 19:31, George J wrote:
>=20
> > Dmitry, I've made some examples,works great!Thanks!And I have one
> > question to understand. Function Gtk.Main.Routers.Init has Delay
> > parameter 0.2 by default.
>=20
> Yes, that parameter controls the timer set in the GTK main. It rarely=20
> need to be faster because except for running curves (e.g. in an=20
> oscilloscope) human eye cannot catch higher frequencies anyway.
>=20
> > So, to make my parsing function faster I have
> > to decrease this value to 0.001 or 0.00001, am I right?
>=20
> No. 1ms (0.001) is the hard limit for thread switching under Windows=20
> anyway, while 10ms is the default. Even a real-time OS would choke at=20
> 10us timer interrupts.
>=20
> > Or is there any
> > function or solution for more "automatical minimal time delay" without
> > my intervention?
>=20
> Usually you accumulate changes and report them at the fixed rate=20
> comfortable for the user. E.g. if you have a tight loop:
>=20
> declare
>     Last_Time : Time :=3D Clock;
>     This_Time : Time;
> begin
>     loop
>        calculate things ...
>=20
>        This_Time :=3D Clock;
>        if This_Time - Last_Time > 0.2 then
>           report state change to the GUI ...
>           Last_Time :=3D This_Time;
>        end if;
>     end loop;
>=20
> You might further filter out small changes, e.g. if, say, the progress=20
> bar change is under 1%, you ignore it.
>=20
> Another technique is to run GUI with its own refresh rate and exchange=20
> data through shared object (e.g. protected object or protected by a=20
> mutex object).
>=20
> --=20
> Regards,
> Dmitry A. Kazakov
> http://www.dmitry-kazakov.de

Ok,Dmitry,thanks a lot!