Gobject的函数G_TYPE_INSTANCE_GET_PRIVATE已弃用

typedef struct _MyObjectPrivate MyObjectPrivate;

struct _MyObject {
  GObject parent_instance;
  MyObjectPrivate *priv;
};

struct _MyObjectClass {
  GObjectClass parent_class;
};

G_DEFINE_TYPE_WITH_PRIVATE(MyObject, my_object, GObject)

struct _MyObjectPrivate {
  gint private_data;
};

static void my_object_class_init(MyObjectClass *klass) {
  GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
  g_type_class_add_private(klass, sizeof(MyObjectPrivate));
}

static void my_object_init(MyObject *self) {
  self->priv = my_object_get_instance_private(self);
  self->priv->private_data = 0;
}

gint my_object_get_private_data(MyObject *self) {
  g_return_val_if_fail(MY_IS_OBJECT(self), 0);
  return self->priv->private_data;
}

void my_object_set_private_data(MyObject *self, gint value) {
  g_return_if_fail(MY_IS_OBJECT(self));
  self->priv->private_data = value;
}