Re: Ada Task priorities

[mfb@mbunix.mitre.org (Michael F Brenner)]

Responding to the question about making tasks A, B, and C run 
sequentially, such that B does not start until A finished, and 
C does not start until A and B finishes. 

This is not a task priority question. Task priorities determine when
a task may start with respect to other tasks starting, not with respect
to their finishing. This is a sequential requirement which must be
programmed sequentially. One way to do this is to invoke entry points
in the 3 tasks like this: 
    loop
      if a is ready then a; 
                         if b is ready then b;
                                            if c is ready then c;
                                            end if;
                         end if;
      elsif b is ready then 
                         if c is ready then c;
                         end if;
      elsif c is ready then
                         c;
      end if;
    end loop;

Of course, then there is no reason to make a, b, and c tasks at all.
Instead the above code could be the main loop of a single task.