/sys$common/syshlp/helplib.hlb System Services, $IO PERFORMW (Alpha Only)  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    On Alpha systems, starts a Fast I/O operation. The $IO_PERFORMW
    service completes synchronously; that is, it returns to the
    caller after performing the Fast I/O operation.

    In all other respects, $IO_PERFORMW is identical to $IO_PERFORM.
    For all other information about the IO_PERFORMW service, refer to
    the help for $IO_PERFORM.

    Format

      SYS$IO_PERFORMW  fandle ,chan ,iosadr ,bufadr ,buflen ,devdata

    C Prototype

      int sys$io_performw  (unsigned __int64 fandl, unsigned short

                           int chan, struct _iosa *iosadr, void

                           *bufadr, unsigned __int64 buflen, unsigned

                           __int64 devdata);