Get the main Gtk struct
the main Gtk struct as a void*
Starts asynchronous initialization of the object implementing the interface. This must be done before any real use of the object after initial construction. If the object also implements #GInitable you can optionally call g_initable_init() instead.
Finishes asynchronous initialization and returns the result. See g_async_initable_init_async().
Finishes the async construction for the various g_async_initable_new calls, returning the created object or %NULL on error.
Helper function for constructing #GAsyncInitable object. This is similar to g_object_new_valist() but also initializes the object asynchronously.
Helper function for constructing #GAsyncInitable object. This is similar to g_object_newv() but also initializes the object asynchronously.
This is the asynchronous version of #GInitable; it behaves the same in all ways except that initialization is asynchronous. For more details see the descriptions on #GInitable.
A class may implement both the #GInitable and #GAsyncInitable interfaces.
Users of objects implementing this are not intended to use the interface method directly; instead it will be used automatically in various ways. For C applications you generally just call g_async_initable_new_async() directly, or indirectly via a foo_thing_new_async() wrapper. This will call g_async_initable_init_async() under the cover, calling back with %NULL and a set %GError on failure.
A typical implementation might look something like this:
|[<!-- language="C" --> enum { NOT_INITIALIZED, INITIALIZING, INITIALIZED };
static void _foo_ready_cb (Foo *self) { GList *l;
self->priv->state = INITIALIZED;
for (l = self->priv->init_results; l != NULL; l = l->next) { GTask *task = l->data;
if (self->priv->success) g_task_return_boolean (task, TRUE); else g_task_return_new_error (task, ...); g_object_unref (task); }
g_list_free (self->priv->init_results); self->priv->init_results = NULL; }
static void foo_init_async (GAsyncInitable *initable, int io_priority, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data) { Foo *self = FOO (initable); GTask *task;
task = g_task_new (initable, cancellable, callback, user_data);
switch (self->priv->state) { case NOT_INITIALIZED: _foo_get_ready (self); self->priv->init_results = g_list_append (self->priv->init_results, task); self->priv->state = INITIALIZING; break; case INITIALIZING: self->priv->init_results = g_list_append (self->priv->init_results, task); break; case INITIALIZED: if (!self->priv->success) g_task_return_new_error (task, ...); else g_task_return_boolean (task, TRUE); g_object_unref (task); break; } }
static gboolean foo_init_finish (GAsyncInitable *initable, GAsyncResult *result, GError **error) { g_return_val_if_fail (g_task_is_valid (result, initable), FALSE);
return g_task_propagate_boolean (G_TASK (result), error); }
static void foo_async_initable_iface_init (gpointer g_iface, gpointer data) { GAsyncInitableIface *iface = g_iface;
iface->init_async = foo_init_async; iface->init_finish = foo_init_finish; } ]|