The LBR$FLUSH routine writes modified blocks back to the library
    file and frees the virtual memory the blocks had been using.

    Format

      LBR$FLUSH  library_index ,block_type

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  –  Arguments

 library_index

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Library control index returned by the LBR$INI_CONTROL routine.
    The library_index argument is the address of the longword that
    contains the index.

 block_type

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    Extent of the flush operation. The block_type argument contains
    the longword value that indicates how the flush operation
    proceeds. If you specify LBR$C_FLUSHDATA, the data blocks are
    flushed. If you specify LBR$C_FLUSHALL, first the data blocks and
    then the current library index are flushed.

    Each programming language provides an appropriate mechanism for
    accessing these symbols.

3  –  Description

    LBR$FLUSH cannot be called from other LBR routines that reference
    cache addresses or by routines called by LBR routines.

4  –  Condition Values Returned

    LBR$_NORMAL        Operation completed successfully.
    LBR$_BADPARAM      Error. A value passed to the LBR$FLUSH routine
                       was either out of range or an illegal value.
    LBR$_WRITERR       Error. An error occurred during the writing of
                       the cached update blocks to the library file.