Re: quarks

["Martin (OpenGeoMap)" <martin opengeomap org>]

G Hasse wrote:
> On Mon, Sep 01, 2008 at 09:16:14AM +0200, Martin (OpenGeoMap) wrote:
>   
> > hi:
> >     
> > > On Mon, Sep 01, 2008 at 02:20:35AM -0300, Martin (OpenGeoMap) wrote:
> > >  
> > >       
> > > > hi!,
> > > >
> > > >
> > > > Someone knows like quarks works in glib????.
> > > >    
> > > >         
> > > I suppose quarks is a pun on "atoms" that is so
> > > often used as a lingo for som small item. Like atoms
> > > in X.
> > >
> > >  
> > >       
> > > > I can not find the source code, only the header. It?? suppose we 
> > > > don need free the string inside a static string of a quarks. But 
> > > > how is that???. Where is the string saved?.
> > > >    
> > > >         
> > > A quark is a pointer to your objeckt. So it is stored inside your 
> > > program. If you don't need the quark any more you should free it.
> > >
> > > GH
> > >  
> > >       
>
> Since GQuark is just an integer that gives a string
> in a GData list you should not manipulate the list yourself.
> (Probalby..)
>
> in FreeBSD look at
> /usr/ports/devel/glib20/work/glib-2.14.2/glib/gdataset.c
>
> ...
>
> GQuark
> g_quark_from_string (const gchar *string)
> {
>   GQuark quark;
>   
>   if (!string)
>     return 0;
>   
>   G_LOCK (g_quark_global);
>   quark = g_quark_from_string_internal (string, TRUE);
>   G_UNLOCK (g_quark_global);
>   
>   return quark;
> }
>
>
> /* HOLDS: g_quark_global_lock */
> static inline GQuark
> g_quark_from_string_internal (const gchar *string, 
>                               gboolean     duplicate)
> {
>   GQuark quark = 0;
>   
>   if (g_quark_ht)
>     quark = GPOINTER_TO_UINT (g_hash_table_lookup (g_quark_ht, string));
>   
>   if (!quark)
>     quark = g_quark_new (duplicate ? g_strdup (string) : (gchar 
> *)string);
>   
>   return quark;
> }
>
>
> /* HOLDS: g_quark_global_lock */
> static inline GQuark
> g_quark_new (gchar *string)
> {
>   GQuark quark;
>   
>   if (g_quark_seq_id % G_QUARK_BLOCK_SIZE == 0)
>     g_quarks = g_renew (gchar*, g_quarks, g_quark_seq_id + 
> G_QUARK_BLOCK_SIZE);
>   if (!g_quark_ht)
>     {
>       g_assert (g_quark_seq_id == 0);
>       g_quark_ht = g_hash_table_new (g_str_hash, g_str_equal);
>       g_quarks[g_quark_seq_id++] = NULL;
>     }
>
>   quark = g_quark_seq_id++;
>   g_quarks[quark] = string;
>   g_hash_table_insert (g_quark_ht, string, GUINT_TO_POINTER (quark));
>   
>   return quark;
> }
>
> So there is no god interface to removing entrys from the table.
>
> There is a function to clear the entire list - but then you lose
> all quarks...
>
> g_datalist_clear_i              (GData          **datalist);
>
>  


Thanks for all responses.

Regards.