The DCX$COMPRESS_DONE routine deletes the context area and sets
    the context variable to zero.

    Format

      DCX$COMPRESS_DONE  context

1  –  Returns

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

    Longword condition value. Most utility routines return a
    condition value in R0. Condition values that this routine can
    return are listed under Condition Values Returned.

2  –  Argument

 context

    OpenVMS usage:context
    type:         longword (unsigned)
    access:       write only
    mechanism:    by reference
    Value identifying the data stream that DCX$COMPRESS_DONE deletes.
    The context argument is the address of a longword containing
    this value. DCX$COMPRESS_INIT writes the value into the context
    argument; you should not modify its value. You can define
    multiple context arguments to identify multiple data streams
    that are processed simultaneously.

3  –  Description

    The DCX$COMPRESS_DONE routine deletes the context area and
    sets the context variable to zero, undoing the work of the
    DCX$COMPRESS_INIT routine. Call DCX$COMPRESS_DONE when all data
    records have been compressed (using DCX$COMPRESS_DATA). After
    calling DCX$COMPRESS_DONE, call LIB$FREE_VM to free the virtual
    memory that DCX$MAKE_MAP used for the compression/expansion
    function.

4  –  Condition Values Returned

    DCX$_INVCTX        Error. The context variable is invalid or the
                       context area is invalid or corrupted. This may
                       be caused by a failure to call the appropriate
                       routine to initialize the context variable or
                       by an application program error.
    DCX$_NORMAL        Normal successful completion.

    This routine also returns any condition values returned by
    LIB$FREE_VM.