Re: g_object_unref

["James M. Cape" <jcape ignore-your tv>]

On Fri, 2003-08-01 at 19:50, Ivo Andrejco wrote:
> Hi,
> could someone , please tell me how to destroy mu custom object. For
> example, if I create MyObject as subclass of GObject. How do I destroy
> it. Will call to g_object_unref release any memory dynamically allocated
> by my object. I would like to know how to safely destroy my MyObject
> without memory leaks. Thanks
> Ivo

You should unref any objects you hold references to in the "dispose"
vtable function, free any memory you have allocated by using the
"finalize" vtable function.

Example:

static gpointer parent_class = NULL;

static void
my_object_finalize (GObject *object)
{
    MyObject *myobj = MY_OBJECT (object);

    g_free (myobj->some_string);
    // etc.

    if (G_OBJECT_CLASS (parent_class)->finalize != NULL)
        (*G_OBJECT_CLASS (parent_class)->finalize) (object);
}


static void
my_object_dispose (GObject *object)
{
    MyObject *myobj = MY_OBJECT (object);

    g_object_unref (myobj->some_other_object);

    if (G_OBJECT_CLASS (parent_class)->dispose != NULL)
        (*G_OBJECT_CLASS (parent_class)->dispose) (object);
}

static void
my_object_class_init (MyObjectClass *class)
{
    GObjectClass *object_class = G_OBJECT_CLASS (class);

    parent_class = g_type_class_peek_parent (class);

    object_class->finalize = my_object_finalize;
    object_class->dispose = my_object_dispose;

    // Anything else you need to do in class_init.
}

-- 
Peace,

    Jim Cape
    http://ignore-your.tv

    "It is literally true that, like Christianity, Socialism
     has conquered the world by defeating itself."
        -- Alexander Berkman, ABC of Anarchism

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