luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2024-11-10 03:16:17 +01:00
Code Issues Packages Projects Releases Wiki Activity

binding: Use a hash table

Browse Source 
Since an object instance might have a lot of bindings, using a list
might become a performance issue when removing them. Using a simple
hash table guarantees constant time lookup, which is the most common
operation.
This commit is contained in:
Emmanuele Bassi 2010-06-16 15:08:10 +01:00
parent f72f65643f
commit 33aa4b4c66
1 changed files with 24 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
gobject/gbinding.c
View File

@ -194,34 +194,45 @@ static inline void
add_binding_qdata (GObject *gobject,
GBinding *binding)
{
GList *bindings;
GHashTable *bindings;
bindings = g_object_get_qdata (gobject, quark_gbinding);
if (bindings == NULL)
{
bindings = g_list_prepend (NULL, binding);
g_object_set_qdata (gobject, quark_gbinding, bindings);
bindings = g_hash_table_new (NULL, NULL);
g_object_set_qdata_full (gobject, quark_gbinding,
bindings,
(GDestroyNotify) g_hash_table_destroy);
}
else
bindings = g_list_prepend (bindings, binding);
g_hash_table_insert (bindings, binding, GUINT_TO_POINTER (1));
}
static inline void
remove_binding_qdata (GObject *gobject,
GBinding *binding)
{
GList *bindings;
GHashTable *bindings;
bindings = g_object_get_qdata (gobject, quark_gbinding);
bindings = g_list_remove (bindings, binding);
g_hash_table_remove (bindings, binding);
}
/* the basic assumption is that if either the source or the target
* goes away then the binding does not exist any more and it should
* be reaped as well
*/
static void
weak_unbind (gpointer user_data,
GObject *where_the_object_was)
{
GBinding *binding = user_data;
/* if what went away was the source, unset it so that GBinding::finalize
* does not try to access it; otherwise, disconnect everything and remove
* the GBinding instance from the object's qdata
*/
if (binding->source == where_the_object_was)
binding->source = NULL;
else
@ -234,6 +245,7 @@ weak_unbind (gpointer user_data,
binding->source = NULL;
}
/* as above, but with the target */
if (binding->target == where_the_object_was)
binding->target = NULL;
else
@ -246,6 +258,7 @@ weak_unbind (gpointer user_data,
binding->target = NULL;
}
/* this will take care of the binding itself */
g_object_unref (binding);
}
@ -399,6 +412,7 @@ g_binding_finalize (GObject *gobject)
{
GBinding *binding = G_BINDING (gobject);
/* dispose of the transformation data */
if (binding->notify != NULL)
{
binding->notify (binding->transform_data);
@ -407,6 +421,9 @@ g_binding_finalize (GObject *gobject)
binding->notify = NULL;
}
/* we need this in case the source and target instance are still
* valid, and it was the GBinding that was unreferenced
*/
if (binding->source != NULL)
{
if (binding->source_notify != 0)