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

[Gunnar Roth <gunnar.roth@gmx.de>]

Marcel Wiesweg wrote:

> 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.
>  
Of course, this is the way it should be. the messages are important and 
should interrupt anything else.
i can later on restart the ticker.

Is there a way to find out, when the status message disappears? can 
cStatus be used to monitor this?

> > > > 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.
>  
I know this is the way it is done in the mp3 player for example.
But the tetris plugin doesnt use cThread, but plain pthread calls.
as i said, i doubt that the behaviour was correct, but wasnt sure about it.


regards,
gunnar





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