1. -- 
  2. -- Uwe R. Zimmer, Australia, 2015 
  3. -- 
  4.  
  5. package body Queue_Pack_Private is 
  6.  
  7.    procedure Enqueue (Item : Element; Queue : in out Queue_Type) is 
  8.  
  9.    begin 
  10.       if Is_Full (Queue) then 
  11.          raise Queue_overflow; 
  12.       end if; 
  13.  
  14.       Queue.Elements (Queue.Free) := Item; 
  15.       Queue.Free     := Queue.Free + 1; 
  16.       Queue.Is_Empty := False; 
  17.    end Enqueue; 
  18.  
  19.    function Is_Full (Queue : Queue_Type) return Boolean is 
  20.      (not Queue.Is_Empty and then Queue.Top = Queue.Free); 
  21.  
  22. end Queue_Pack_Private;