DataWriterListener_DEFAULT : constant DDS_DataWriterListener :=
(as_listener => (listener_data => System.Null_Address),
on_offered_deadline_missed => On_Offered_Deadline_Missed'Access,
On_Offered_Incompatible_Qos => On_Offered_Incompatible_Qos'Access,
On_Liveliness_Lost => On_Liveliness_Lost'Access,
On_Publication_Matched => On_Publication_Matched'Access,
On_Reliable_Writer_Cache_Changed => On_Reliable_Writer_Cache_Changed'Access,
On_Reliable_Reader_Activity_Changed => On_Reliable_Reader_Activity_Changed'Access,
on_destination_unreachable => On_Destination_Unreachable'Access,
on_data_request => On_Data_Request'Access,
on_data_return => On_Data_Return'Access,
on_sample_removed => On_Sample_Removed'Access,
on_instance_replaced => On_Instance_Replaced'Access,
on_application_acknowledgment => On_Application_Acknowledgment'Access);