g_closure_set_meta_marshal (
  GClosure* closure,
  gpointer marshal_data,
  GClosureMarshal meta_marshal


Sets the meta marshaller of closure.

A meta marshaller wraps the closures marshal and modifies the way it is called in some fashion. The most common use of this facility is for C callbacks.

The same marshallers (generated by [glib-genmarshal][glib-genmarshal]), are used everywhere, but the way that we get the callback function differs. In most cases we want to use the closures callback, but in other cases we want to use some different technique to retrieve the callback function.

For example, class closures for signals (see g_signal_type_cclosure_new()) retrieve the callback function from a fixed offset in the class structure. The meta marshaller retrieves the right callback and passes it to the marshaller as the marshal_data argument.

This method is not directly available to language bindings.


marshal_data gpointer

Context-dependent data to pass to meta_marshal.

 The argument can be NULL.
 The data is owned by the caller of the function.
meta_marshal GClosureMarshal

A GClosureMarshal function.

 The argument can be NULL.