VMS Help RTL Routines, PPL$, PPL$RELEASE_SPIN_LOCK, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 lock-id

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

    Lock-id is returned by PPL$CREATE_SPIN_LOCK.