Re: pointer scope issues

[Owen Taylor <otaylor redhat com>]

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Thanks,
                                        Owen

Najati R Imam <nrimam0@pop.uky.edu> writes:

> I've recently started playing around with gtk and in the two things I've tried
> to do I think I've come across the same problem. I'll use the second as my
> example:
> 
> I set up a struct node that contains a data variable and a prev and next
> pointers to other node and a pointer to the widget that I need to modify. its a
> really simple 2xlinked list class that, but thats all I need and I've written a
> hundread of these thing and am positive I'm doing it right. But it seems that
> whenever I call the callback the makes a new one (at the "clicked" of a button)
> it goes and makes the new one, sets it up right and advanced the current
> pointer (which I am passing as the user data in the callback) and then when it
> leaves it forgets it.
> 
> So it seems pretty obvious to me that the scope on my user data (current) isn't
> right but I can't find anything that should work more then what I have that
> doesn't segfault. Is there something funny with callbacks that I wouldn't know
> from plains old c/c++ scope?
>