This language feature has been introduced in Ada 2012.Category:Book:Ada Programming/Ada 2012 feature#Ada.Containers.Unbounded Synchronized Queues Ada.Containers.Unbounded_Synchronized_Queues is a unit of the Predefined Language Environment since Ada 2012.

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Specification

--                     Standard Ada library specification
--   Copyright (c) 2004-2016 AXE Consultants
--   Copyright (c) 2004, 2005, 2006 Ada-Europe
--   Copyright (c) 2000 The MITRE Corporation, Inc.
--   Copyright (c) 1992, 1993, 1994, 1995 Intermetrics, Inc.
--   SPDX-License-Identifier: BSD-3-Clause and LicenseRef-AdaReferenceManual
-- -------------------------------------------------------------------------

with System;
with Ada.Containers.Synchronized_Queue_Interfaces;
generic
   with package Queue_Interfaces is new Ada.Category:Book:Ada Programming/Pages containing deprecated templatesContainers.Category:Book:Ada Programming/Pages containing deprecated templatesSynchronized_Queue_Interfaces (<>Category:Book:Ada Programming/Pages containing deprecated templates);
   Default_Ceiling : System.Category:Book:Ada Programming/Pages containing deprecated templatesAny_Priority := System.Category:Book:Ada Programming/Pages containing deprecated templatesPriority'Last;
package Ada.Containers.Unbounded_Synchronized_Queues is
   pragma Preelaborate(Unbounded_Synchronized_Queues);

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

   protected type Queue
        (Ceiling : System.Category:Book:Ada Programming/Pages containing deprecated templatesAny_Priority := Default_Ceiling)
           with Priority =>Category:Book:Ada Programming/Pages containing deprecated templates Ceiling is
        new Queue_Interfaces.Category:Book:Ada Programming/Pages containing deprecated templatesQueue with

      overriding
      entry Enqueue (New_Item : in Queue_Interfaces.Category:Book:Ada Programming/Pages containing deprecated templatesElement_Type);
      overriding
      entry Dequeue (Element : out Queue_Interfaces.Category:Book:Ada Programming/Pages containing deprecated templatesElement_Type);

      overriding
      function Current_Use return Count_Type;
      overriding
      function Peak_Use return Count_Type;

   private
       --  not specified by the language
   end Queue;

private

    --  not specified by the language

end Ada.Category:Book:Ada Programming/Pages containing deprecated templatesContainers.Category:Book:Ada Programming/Pages containing deprecated templatesUnbounded_Synchronized_Queues;

See also