since: 2.28


g_source_add_child_source (
  GSource* source,
  GSource* child_source


Adds child_source to source as a “polled” source; when source is added to a GMainContext, child_source will be automatically added with the same priority, when child_source is triggered, it will cause source to dispatch (in addition to calling its own callback), and when source is destroyed, it will destroy child_source as well. (source will also still be dispatched if its own prepare/check functions indicate that it is ready.)

If you don’t need child_source to do anything on its own when it triggers, you can call g_source_set_dummy_callback() on it to set a callback that does nothing (except return TRUE if appropriate).

source will hold a reference on child_source while child_source is attached to it.

This API is only intended to be used by implementations of GSource. Do not call this API on a GSource that you did not create.

Available since: 2.28



Type: GSource

A second GSource that source should “poll”

The data is owned by the caller of the function.