barrier-id

    OpenVMS usage identifier
    type          longword (unsigned)
    access        read only
    mechanism     by reference
    Identifier of the barrier. The optional barrier-id argument
    is the address of an unsigned longword containing the barrier
    identifier.

 barrier-name

    OpenVMS usage char_string
    type          character string
    access        read only
    mechanism     by descriptor
    Name of the barrier. The optional barrier-name argument is the
    address of a descriptor pointing to a character string containing
    the barrier name.