object-manager.c

    global->flags |= flag;

    /* store the most deep type (i.e. WpImplNode instead of WpNode),
       so that object-manager interests can work more accurately
       if the interest is on a specific subclass */
    if (g_type_depth (type) > g_type_depth (global->type))
      global->type = type;

    if (proxy) {
      g_return_if_fail (global->proxy == NULL);
      global->proxy = proxy;
    }

    if (props)
      wp_properties_update_from_dict (global->properties, props);
  }

  if (new_global)
    *new_global = g_steal_pointer (&global);
}

/*
 * wp_registry_find_object:
 * @reg: the registry
 * @func: (scope call): a function that takes the object being searched
 *   as the first argument and @data as the second. it should return TRUE if
 *   the object is found or FALSE otherwise
 * @data: the second argument to @func
 *
 * Finds a registered object
 *
 * Returns: (transfer full) (type GObject *) (nullable): the registered object
 *   or NULL if not found
 */
gpointer
wp_registry_find_object (WpRegistry *reg, GEqualFunc func, gconstpointer data)
{
  GObject *object;
  guint i;

  /* prevent bad things when called from within wp_registry_clear() */
  if (G_UNLIKELY (!reg->objects))
    return NULL;

  for (i = 0; i < reg->objects->len; i++) {
    object = g_ptr_array_index (reg->objects, i);
    if (func (object, data))
      return g_object_ref (object);
  }

  return NULL;
}

/*
 * wp_registry_register_object:
 * @reg: the registry
 * @obj: (transfer full) (type GObject*): the object to register
 *
 * Registers @obj with the core, making it appear on #WpObjectManager
 * instances as well. The core will also maintain a ref to that object
 * until it is removed.
 */
void
wp_registry_register_object (WpRegistry *reg, gpointer obj)
{
  g_return_if_fail (G_IS_OBJECT (obj));

  /* prevent bad things when called from within wp_registry_clear() */
  if (G_UNLIKELY (!reg->objects)) {
    g_object_unref (obj);
    return;
  }

  g_ptr_array_add (reg->objects, obj);

  /* notify object managers */
  wp_registry_notify_add_object (reg, obj);
}

/*
 * wp_registry_remove_object:
 * @reg: the registry
 * @obj: (transfer none) (type GObject*): a pointer to the object to remove
 *
 * Detaches and unrefs the specified object from this core
 */
void
wp_registry_remove_object (WpRegistry *reg, gpointer obj)
{
  g_return_if_fail (G_IS_OBJECT (obj));

  /* prevent bad things when called from within wp_registry_clear() */
  if (G_UNLIKELY (!reg->objects))
    return;

  /* notify object managers */
  wp_registry_notify_rm_object (reg, obj);

  g_ptr_array_remove_fast (reg->objects, obj);
}

/**
 * wp_core_install_object_manager:
 * @self: the core
 * @om: (transfer none): a #WpObjectManager
 *
 * Installs the object manager on this core, activating its internal management
 * engine. This will immediately emit signals about objects added on @om
 * if objects that the @om is interested in were in existence already.
 */
void
wp_core_install_object_manager (WpCore * self, WpObjectManager * om)
{
  WpRegistry *reg;
  guint i;

  g_return_if_fail (WP_IS_CORE (self));
  g_return_if_fail (WP_IS_OBJECT_MANAGER (om));

  reg = wp_core_get_registry (self);

  g_object_weak_ref (G_OBJECT (om), object_manager_destroyed, reg);
  g_ptr_array_add (reg->object_managers, om);
  g_object_set (om, "core", self, NULL);

  /* add pre-existing objects to the object manager,
     in case it's interested in them */
  for (i = 0; i < reg->globals->len; i++) {
    WpGlobal *g = g_ptr_array_index (reg->globals, i);
    /* check if null because the globals array can have gaps */
    if (g)
      wp_object_manager_add_global (om, g);
  }
  for (i = 0; i < reg->objects->len; i++) {
    GObject *o = g_ptr_array_index (reg->objects, i);
    wp_object_manager_add_object (om, o);
  }
}

/* WpGlobal */

G_DEFINE_BOXED_TYPE (WpGlobal, wp_global, wp_global_ref, wp_global_unref)

void
wp_global_rm_flag (WpGlobal *global, guint rm_flag)
{
  WpRegistry *reg = global->registry;

  /* no flag to remove */
  if (!(global->flags & rm_flag))
    return;

  /* global was owned by the proxy; by removing the flag, we clear out
     also the proxy pointer, which is presumably no longer valid and we
     notify all listeners that the proxy is gone */
  if (rm_flag == WP_GLOBAL_FLAG_OWNED_BY_PROXY) {
    global->flags &= ~WP_GLOBAL_FLAG_OWNED_BY_PROXY;
    if (reg)
      wp_registry_notify_rm_object (reg, global->proxy);
    global->proxy = NULL;
  }
  /* registry removed the global */
  else if (rm_flag == WP_GLOBAL_FLAG_APPEARS_ON_REGISTRY) {
    global->flags &= ~WP_GLOBAL_FLAG_APPEARS_ON_REGISTRY;

    /* if there is a proxy and it's not owning the global, destroy it */
    if (global->flags == 0 && global->proxy) {
      if (reg)
        wp_registry_notify_rm_object (reg, global->proxy);
      wp_proxy_destroy (global->proxy);
      g_clear_object (&global->proxy);
    }
  }

  /* drop the registry's ref on global when it has no flags anymore */
  if (global->flags == 0 && reg) {
    g_clear_pointer (&g_ptr_array_index (reg->globals, global->id), wp_global_unref);
  }
}

struct pw_proxy *
wp_global_bind (WpGlobal * global)
{
  g_return_val_if_fail (global->proxy, NULL);
  g_return_val_if_fail (global->registry, NULL);

  WpProxyClass *klass = WP_PROXY_GET_CLASS (global->proxy);
  return pw_registry_bind (global->registry->pw_registry, global->id,
      klass->pw_iface_type, klass->pw_iface_version, 0);
}