Stored procedure to update rows and return in result set

I am wanting to write a stored procedure that will update rows and return the same rows as a result set.  Here is a possible solution.  However, it seems like there is a possiblilty that different rows may be returned than those updated if other activity on the table occurs between the select and update.  Is there a way to use the recordset as input to an update so I can insure the same rows are updated?  Or, is there a better way.   Thanks, Gary

create or replace
PROCEDURE UPD_MY_SUFF
(   I_DATE IN DATE 
  , O_ERR_NUM OUT NUMBER