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

    The Remove Entry from Tail of Queue routine removes an entry
    from the tail of the specified self-relative longword interlocked
    queue. LIB$REMQTI makes the REMQTI instruction available as a
    callable routine.

    Format

      LIB$REMQTI  header ,remque-address [,retry-count]

1 - Returns

    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value

2 - Arguments

 header

    OpenVMS usage:quadword_signed
    type:         quadword integer (signed)
    access:       modify
    mechanism:    by reference

    Queue header specifying the queue from which the entry is to be
    deleted. The header argument contains the address of this signed
    aligned quadword integer. The header argument must be initialized
    to zero before first use of the queue; zero means an empty queue.

    On Alpha systems, the header argument must contain a 32-bit sign-
    extended address. An illegal operand exception occurs for any
    other form of address.

 remque-address

    OpenVMS usage:address
    type:         longword (unsigned)
    access:       write only
    mechanism:    by reference

    Address of the removed entry. The remque-address argument is the
    address of a longword that contains this address. If the queue
    was empty, remque-address is set to the address of the header.

    On Alpha systems, the remque-address argument must contain a 32-
    bit sign-extended address. An illegal operand exception occurs
    for any other form of address.

 retry-count

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference

    The number of times the operation is to be retried in case
    of secondary-interlock failure of the queue instruction in a
    processor-shared memory application. The retry-count argument is
    the address of a longword that is this retry count value. A value
    of 1 causes no retries. The default value is 10.