Sets a dummy callback for source. The callback will do nothing, and
if the source expects a gboolean return value, it will return true.
(If the source expects any other type of return value, it will return
a 0/null value; whatever g_value_init() initializes a GObject.Value to for
that type.)
If the source is not one of the standard GLib types, the
closure_callback and closure_marshal fields of the GLib.SourceFuncs
structure must have been filled in with pointers to appropriate
functions.
Sets a dummy callback for
source. The callback will do nothing, and if the source expects agbooleanreturn value, it will returntrue. (If the source expects any other type of return value, it will return a 0/nullvalue; whateverg_value_init()initializes a GObject.Value to for that type.)If the source is not one of the standard GLib types, the
closure_callbackandclosure_marshalfields of the GLib.SourceFuncs structure must have been filled in with pointers to appropriate functions.