Re: GtkListStore and Threads problems

[Lorena Salinas <lsalinas invap com ar>]

Using gdb I obtained this:

Starting program: /home/lore/Projects/hostThread/src/hostthread
--g-fatal-warnings
[Thread debugging using libthread_db enabled]
[New Thread -1216235072 (LWP 13483)]
[New Thread -1218425936 (LWP 13484)]

Gtk-ERROR **: file gtksequence.c: line 760
(_gtk_sequence_node_find_by_pos): assertion failed: (node->parent !=
NULL)
aborting...

Program received signal SIGABRT, Aborted.
[Switching to Thread -1216235072 (LWP 13483)]
0xffffe410 in __kernel_vsyscall ()

On Thu, 2005-06-16 at 12:47 +0000, Peter Bloomfield wrote:
> On 06/15/2005 07:55:45 PM Wed, Lorena Salinas wrote:
> > Here is a graphic to show where (I suppose) the problem is:
> [ snip ]
> > T1: gtk_main() starts to read the 5 columns of row 1 from the  
> > model shared with
> >    the working thread (using gtk_tree_model_get())
> >
> > T2: the working thread locks GTK main thread
> >    gtk_main() is blocked in the middle of the loop to read the  
> > 5 columns
>
> I doubt that could happen.  The main thread would have to drop  
> the lock in order for the working thread to get it, and I don't  
> believe it would do that in the middle of the supposed loop.   
> Instead, the working thread is blocked until the main thread  
> activity is done, and the lock is released.
>
> You could get a little more detail on where the original problem  
> arises by running with --g-fatal-warnings under gdb a few times.   
> The stack traces will let you know what was going on at the time.
>
> Peter