The Adjust Barrier Quorum routine increments or decrements the
    quorum associated with a barrier.

    Format

      PPL$ADJUST_QUORUM  barrier-id ,amount

1 - Arguments

 barrier-id

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

    Barrier-id is returned by PPL$CREATE_BARRIER.

 amount

    OpenVMS usage word_signed
    type          word (signed)
    access        read only
    mechanism     by reference
    Value to add to the barrier quorum. The amount argument is the
    address of a signed word containing the amount. You can specify a
    negative value to decrement the quorum.