A.18.28 The Generic Package Containers.Unbounded_Synchronized_Queues

with System;
with Ada.Containers.Synchronized_Queue_Interfaces;
generic
with package Queue_Interfaces is
new Ada.Containers.Synchronized_Queue_Interfaces (<>);
Default_Ceiling : System.Any_Priority := System.Priority'Last;
package Ada.Containers.Unbounded_Synchronized_Queues
with Preelaborate,
Nonblocking, Global => in out synchronized is

package Implementation is
... -- not specified by the language
end Implementation;

protected type Queue
(Ceiling : System.Any_Priority := Default_Ceiling)
with Priority => Ceiling is
new Queue_Interfaces.Queue with

overriding
entry Enqueue (New_Item : in Queue_Interfaces.Element_Type);
overriding
entry Dequeue (Element : out Queue_Interfaces.Element_Type);

overriding
function Current_Use return Count_Type
with Nonblocking, Global => null, Use_Formal => null;
overriding
function Peak_Use return Count_Type
with Nonblocking, Global => null, Use_Formal => null;

private
... -- not specified by the language
end Queue;

... -- not specified by the language

end Ada.Containers.Unbounded_Synchronized_Queues;