Sets the process current transaction and removes resource
    managers from transactions.

    $SETDTIW$ always waits for the request to complete before
    returning to the caller. Other than this, it is identical to
    $SETDTI.

    Format

      SYS$SETDTIW  [efn], [flags], iosb, [astadr], [astprm],

                   [contxt], func, itmlst

    C Prototype

      int sys$setdtiw  (unsigned int efn, unsigned int flags, struct

                       _iosb *iosb, void (*astadr)(__unknown_params),

                       int astprm, unsigned int *contxt, unsigned

                       short int *func, void *itmlst);