inadr

    OpenVMS usage:address_range
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Starting and ending virtual addresses of the range of pages to be
    locked. The inadr argument is the address of a 2-longword array
    containing, in order, the starting and ending process virtual
    addresses. Only the virtual page number portion of each virtual
    address is used; the low-order byte-within-page bits are ignored.

 retadr

    OpenVMS usage:address_range
    type:         longword (unsigned)
    access:       write only
    mechanism:    by reference
    Starting and ending process virtual addresses of the pages that
    $LCKPAG actually locked. The retadr argument is the address of
    a 2-longword array containing, in order, the starting and ending
    process virtual addresses.

 acmode

    OpenVMS usage:access_mode
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    Access mode to be associated with the pages to be locked. The
    acmode argument is a longword containing the access mode. The
    $PSLDEF macro defines the four access modes.

    The most privileged access mode used is the access mode of the
    caller. For the $LCKPAG service to complete successfully, the
    resultant access mode must be equal to or more privileged than
    the access mode already associated with the pages to be locked.