with Monitor;
generic
    type Item is private;
package Queue_Nonpriority_Balking_Multiple_Unbounded_Unmanaged_Noniterator is

    type Queue is limited private;

    procedure Copy (From_The_Queue : in Queue; To_The_Queue : in out Queue);
    procedure Clear (The_Queue : in out Queue);
    procedure Add (The_Item : in Item; To_The_Queue : in out Queue);
    procedure Pop (The_Queue : in out Queue);
    procedure Remove_Item (From_The_Queue : in out Queue;
                           At_The_Position : in Positive);

    function Is_Equal (Left : in Queue; Right : in Queue) return Boolean;
    function Length_Of (The_Queue : in Queue) return Natural;
    function Is_Empty (The_Queue : in Queue) return Boolean;
    function Front_Of (The_Queue : in Queue) return Item;
    function Position_Of
                (The_Item : in Item; In_The_Queue : in Queue) return Natural;

    Overflow : exception;
    Underflow : exception;
    Position_Error : exception;

private
    type Node;
    type Structure is access Node;
    type Queue is
        record
            Guard : Monitor.Kind;
            The_Front : Structure;
            The_Back : Structure;
        end record;
end Queue_Nonpriority_Balking_Multiple_Unbounded_Unmanaged_Noniterator;