[vdr] Re: can the osd be accessed by a separate pthread?

[Marcel Wiesweg <marcel.wiesweg@gmx.de>]

Am Sonntag, 22. Juni 2003 18:27 schrieb Gunnar Roth:
> Clemens Kirchgatterer wrote:
> > this is no problem. i tell you what really happens:
> >
> >1. vdr starts the games plugin.
> >2. the plugin spawns its own "main thread".
> >3. the main thread opens the raw osd.
>
> I know...
>
> >>from now on this is the only instance, that does access the osd, so no
> >
> >problem.
>
> Is this really true?  what about  a status message appearing because of
> cutting process ended?
> or a message iniated by a call to svdrsend.pl? my vbox plugin also show
> a status message if new calls are available.

As you can easily find outby testing, in this case the cOsdObject returned by 
MainMenuAction is deleted (it should close the OsdBase then), and the message 
is displayed.
So this will interrupt your newsticker.

>
> >>if not, how can a plugin draw an animated osd graphic smootly? i doubt
> >>that doing the drawing on kNone gives a smooth result.
> >
> >i guess kNone just comes to unregulary to use this.
>
> This maybe the case indeed.
>
> >>furthermore this plugin, doesnt wait until the thread really ends, but
> >>simply the the running flag to falls, on BACK-KEY press and returns
> >>from PROCESS key.
> >>it doubt that this is a correct behaviour. im all new to pthreads on
> >>linux so i cannt estimate what can be done and what not.

You generally do 
running = false;
Cancel(1);
so that when the thread does not end within one second, it will be killed the 
hard way.

> >
> >when you fall out of the main thread, what do you want to wait for?
> >when it ends, it ends. nothin more, nothing less. :-)
>
> to wait until the thread really ends. because the thread  accesses the osd.
>
> >best regards ...
> >clemens
>
> even better regards *g*
> gunnar



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