void (* GAsyncReadyCallback) ( GObject* source_object, GAsyncResult* res, gpointer user_data )
Type definition for a function that will be called back when an asynchronous
operation within GIO has been completed.
GTask are guaranteed to be invoked in a later
iteration of the
[thread-default main context][g-main-context-push-thread-default]
GTask was created. All other users of
GAsyncReadyCallback must likewise call it asynchronously in a
later iteration of the main context.