Re: Memory question

[Colossus <colossus 3000 it>]

Ok,

the correct way is to cast g_strerror to (char *):

response = ShowGtkMessageDialog (GTK_WINDOW 
(MainWindow),GTK_DIALOG_MODAL,GTK_MESSAGE_ERROR,GTK_BUTTONS_OK,(char 
*) g_strerror(errno));

This way i don't get any warning.

Colossus wrote:
> Hi,
>
> I did as you suggested me but gcc 3.4.3 gives me this warning:
>
> callbacks.c:605: warning: passing arg 5 of `ShowGtkMessageDialog' 
> discards qualifiers from pointer target type
>
> and the line 605 is:
> response = ShowGtkMessageDialog (GTK_WINDOW 
> (MainWindow),GTK_DIALOG_MODAL,GTK_MESSAGE_ERROR,GTK_BUTTONS_OK,g_strerror(errno)); 
>
>
> Colossus
>
> Christian Neumair wrote:
>
> > Because g_strerror returns a const char * (meaning that you
> > may not/can't/don't have to free it, since your app doesn't own the
> > memory), you can simply call
> >
> > ShowGtkMessageDialog (GTK_WINDOW (MainWindow),
> >                       GTK_DIALOG_MODAL, GTK_MESSAGE_ERROR,
> >                       GTK_BUTTONS_OK,
> >               g_strerror (errno));
> >
> > without leaking anything.


--
Colossus

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