Re: Leaking despite gtk_list_store_clear()

[Andrew Smith <asmith15 learn senecac on ca>]

Andrew Smith a écrit :
> Hi
>
> I am using a GtkTreeView to display the contents of the filesystem in my 
> application. It always worked (I mostly followed 
> http://scentric.net/tutorial/) but I just found that it leaks memory.
>
> My understanding of the tree view model is somewhat limited so I won't 
> try to speculate about what's causing the leak - all I know is it 
> happens even though I call gtk_list_store_clear() on my GtkListStore*.
>
> Would someone please take a look? It's relatively simple code, the leak 
> happens in changeFsDirectory(): http://littlesvr.ca/misc/fsbrowser.c 
> (it's part of ISO Master).
>
> If you don't have the time to look at it, would you at least suggest 
> common reasons why repopulating a GtkListStore* would cause a memory leak?
>
> Thanks in advance,
>
> Andrew

Hello again

I found the problem. It wasn't in the file I referenced, it was in the 
sort function which did a gtk_tree_model_get(string) without freeing the 
string. Sorry for bothering you, but I hope this message gets archived 
and helps out someone who's got the same problem and is searching for a 
solution.

By the way, I also fixed a huge performance problem with the same code. 
It turns out most of the time it took me to change the directory was 
spent in the function that compared the rows. It also turns out there is 
no way to disable sorting temporarily (while the list is repopulated).

What I've done is to make a sort function that simply always returns 0; 
and set that sort function on all the columns while the list was 
repopulated. I would humbly suggest this should go in the GTK 
documentation, since it's a problem that anyone with long lists needs to 
deal with.

Of course it would be even better if a 
gtk_tree_sortable_enable_sort(gboolean) were added in the next minor GTK 
version :)

Should I post this suggestion to gtk-devel-list, or do they read this 
list as well?

Cheers,

Andrew