Re: directories in TMapFile
Valeriy Onuchin (onuchin@emcal06.rhic.bnl.gov)
Tue, 29 Sep 1998 16:11:02 -0400
Fons Rademakers wrote:
>
> Hi Piergiorgio,
>
> sorry but directories in shared files are not supported.
> The TMapFile is to be seen as one directory. What you could
> do is to use multiple TMapFiles.
>
> Cheers, Fons.
>
> Piergiorgio Cerello wrote:
> >
> > Dear Rooters,
> >
> > I'd like to set up a directory structure into a memory mapped file, in
> > order to monitor different groups of histograms.
> >
> > In the producer, I open the TMapFile and then I create a directory tree,
> > which I check to be ok by listing the content.
> >
> > Then, the producer starts the loop on the events, and it works well until
> > the end of run.
> >
> > On the consumer side, I browse the shared memory, but I can only access
> > the histograms in the top directory. If I try to retrieve a subdirectory
> > nothing happens (indeed the browser doesn't show them as folders but as
> > objects).
> >
> > What's wrong or missing?
> > Thanks,
> >
> > Piergiorgio
>
Just a comment:
TMapFile cannot work well containing
pointers-to-pointers (for example TList* )
This is the main reason.
Best regards . Valera
P.S.
Concerning my ???
http://root.cern.ch/root/roottalk/roottalk98/1839.html
Could you introduce method to get Current breakval?
Some more comments. For my opinion ROOT in many cases
is overprotected. Why I can not get access to
gObjectTable::list_of_objects or gSystem::list_of_timers?
similar examples are in gui classes.
It could be very nice to have possibility to open up some
secure data members just for debugging.