[Gambas-user] Problems with the IDE and Stream buffering

[Tobias Boege]

On Thu, 29 Aug 2013, Beno?t Minisini wrote:
> Le 29/08/2013 21:34, Tobias Boege a ?crit :
> > On Thu, 29 Aug 2013, Beno?t Minisini wrote:
> >> Le 26/08/2013 15:30, Tobias Boege a ?crit :
> >>> On Wed, 21 Aug 2013, Tobias Boege wrote:
> >>>> Hi folks,
> >>>>
> >>>> is anyone else having trouble with the latest revision(s)? I observed two
> >>>> things:
> >>>>
> >>>> 1) Stream buffering broken. If I have a Process (it may equivalently well
> >>>>      be only a Process problem (not a general Stream one) as it is the Process
> >>>>      code which was touched recently), I get one line from it and nothing more
> >>>>      until the program terminates (or the Process object is released).
> >>>>
> >>>>      The IDE has the same problem with my programs: If I use Print/Debug/Error
> >>>>      in the code, the IDE doesn't see them until the program is closed.
> >>>>
> >>>> 2) IDE property panel unusable. I can't set values anymore. The errors say
> >>>>      "Incorrect property value." for everything. I can't set a Boolean to True
> >>>>      anymore, to give an example.
> >>>>
> >>>> I did a complete
> >>>>
> >>>> $ make clean && ./reconf-all && ./configure && make -j5 && sudo make install
> >>>>
> >>>> and the problems remain!
> >>>>
> >>>> I'd like to know if anyone can reproduce these problems or if something over
> >>>> here is _seriously_ broken.
> >>>>
> >>>> Oh, and I should note that I have also installed an alternate version of
> >>>> Gambas in my local $HOME/bin which I can run and it doesn't show the above
> >>>> both symptoms. My broken version in use is #5812 and the working alternate
> >>>> version is #5801.
> >>>>
> >>>
> >>> FYI, I downgraded to #5802 and the problems are gone. So I guess I'll have
> >>> to wait for Benoit as it's likely not my system which gets things wrong but
> >>> Gambas.
> >>>
> >>> Regards,
> >>> Tobi
> >>>
> >>
> >> Is it better with revision #5816?
> >>
> >
> > It's not. I spent the afternoon searching for a solution myself. I should
> > note that I use Line Input in a Read event of a file or a process (in my
> > test project). The symptom is that the Read event does not raise anymore.
> >
> > Before #5816, both didn't work. With #5816, the process is OK, but not the
> > file.
> >
> > If I am correct, with the recent changes, a stream's read function can (if
> > it returns non-zero in case of EOF) disable generation of Read events. This
> > happens e.g. when the file is completely read into the buffer. Even if the
> > buffer has data left inside, the fd is completely read and the read
> > callbacks are disabled.
> >
> > I have a patch attached which fixes Process and File on my system when used
> > with Line Input in a Read event but I don't know if the changes are placed
> > properly. It should apply to #5816.
> >
> > Regards,
> > Tobi
> >
> > PS: I have also to report that my program slows down insanely when they read
> >      many data from a process (like when I watch a Gambas compilation). But
> >      feel free to return to this issue after your holidays.
> >
> >
> 
> And now, with revision #5817? Do you have a little test project so that 
> I can check your problems?
> 

It's not fixed. I attach a sample project for the stream Line Input case.

I will prepare reports for the "massive input" thing and for my IDE problems
tomorrow. Nothing urgent, though.

Regards,
Tobi
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