request_id

    OpenVMS usage:address
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Request identifier value supplied by the symbiont when it calls
    your output routine. The request_id argument is the address of a
    longword containing this value.

    If your output routine initiates an asynchronous operation (for
    example, a call to the $QIO system service), you must save the
    request_id argument because you will need to store the request
    identifier value for later use with the PSM$REPORT routine. See
    the description of the PSM$REPORT routine for more information.

 work_area

    OpenVMS usage:address
    type:         longword (unsigned)
    access:       write only
    mechanism:    by reference
    Work area supplied by the symbiont for the use of your format
    routine. The symbiont supplies the address of this area when
    it calls your routine. The work_area argument is a longword
    containing the address of the work area. The work area is a
    section of memory that your format routine can use for buffering
    and other internal operations.

    The size of the work area allocated is specified by the work_size
    argument in the PSM$PRINT routine. If you do not specify work_
    size in the call to PSM$PRINT, no work area is allocated.

    In a multithreaded symbiont, a separate work area is allocated
    for each thread. This work area is shared by all user routines.
    The work area is initialized to zero when the symbiont is first
    started.

 func

    OpenVMS usage:function_code
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Function code supplied by the symbiont when it calls your
    output routine. The func argument is the address of a longword
    containing this code.

    The function code specifies the reason the symbiont is calling
    your output routine or, in other words, the function that the
    symbiont expects your routine to perform at this time.

    Most function codes require or allow additional information to
    be passed in the call via the funcdesc and funcarg arguments. The
    description of each output function code, therefore, includes a
    description of how these two arguments are used for that function
    code.

    The following list describes all the function codes that the
    symbiont might supply when it calls your output routine (function
    codes applicable only to input and formatting routines are
    explained in the descriptions of the user input routine and user
    formatting routine, respectively). Each programming language
    provides an appropriate mechanism for defining these function
    codes.