VMS Help System Services, $IO FASTPATHW (Alpha Only)  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Performs operations on the set of Fast Path devices and CPUs
    enabled for Fast Path use.

    The $IO_FASTPATHW system service is functionally equivalent to
    the $IO_FASTPATH service except that it completes synchronously.
    That is, it returns after the operation is complete.

    Format

      SYS$IO_FASTPATHW  efn ,cpu_mask ,function_code

    C Prototype:

      int sys$io_fastpathw  (unsigned int efn, UINT32_PQ cpu_mask,

                            unsigned int function_code);