Sets the meta marshaller of @closure. A meta marshaller wraps
@closure->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 @closure->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.
Sets the meta marshaller of @closure. A meta marshaller wraps @closure->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 @closure->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.