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gobject: Handle ref_count==0 in notify_by_pspec

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Just like g_object_notify, check for a zero ref_count in
g_object_notify_by_pspec and leave if it is 0.

This allows using functions in ->finalize() that possibly also
notify a property change on the object.  Previously,
this resulted in an error from g_object_ref.

https://bugzilla.gnome.org/show_bug.cgi?id=705570
This commit is contained in:
Nick Schermer 2013-08-07 21:01:00 +02:00 committed by Colin Walters
parent 62f173f1f3
commit 4b334ef8f1
2 changed files with 10 additions and 0 deletions
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3
gobject/gobject.c
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@ -1238,6 +1238,9 @@ g_object_notify_by_pspec (GObject *object,
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
if (g_atomic_int_get (&object->ref_count) == 0)
return;
g_object_ref (object);
g_object_notify_by_spec_internal (object, pspec);
g_object_unref (object);

7
gobject/tests/properties.c
View File

@ -67,6 +67,13 @@ test_object_finalize (GObject *gobject)
{
g_free (((TestObject *) gobject)->baz);
/* When the ref_count of an object is zero it is still
* possible to notify the property, but it should do
* nothing and silenty quit (bug #705570)
*/
g_object_notify (gobject, "foo");
g_object_notify_by_pspec (gobject, properties[PROP_BAR]);
G_OBJECT_CLASS (test_object_parent_class)->finalize (gobject);
}