Data Fields | |
DDS_Long | alive_count |
The total count of currently alive DDS_DataWriter entities that write the DDS_Topic the DDS_DataReader reads. | |
DDS_Long | not_alive_count |
The total count of currently not_alive DDS_DataWriter entities that write the DDS_Topic the DDS_DataReader reads. | |
DDS_Long | alive_count_change |
The change in the alive_count since the last time the listener was called or the status was read. | |
DDS_Long | not_alive_count_change |
The change in the not_alive_count since the last time the listener was called or the status was read. | |
DDS_InstanceHandle_t | last_publication_handle |
An instance handle to the last remote writer to change its liveliness. |
The DDS_DataReaderListener::on_liveliness_changed callback may be invoked for the following reasons:
The total count of currently alive DDS_DataWriter entities that write the DDS_Topic the DDS_DataReader reads.
The total count of currently not_alive DDS_DataWriter entities that write the DDS_Topic the DDS_DataReader reads.
The change in the alive_count since the last time the listener was called or the status was read.
The change in the not_alive_count since the last time the listener was called or the status was read.
An instance handle to the last remote writer to change its liveliness.