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+------------------------------------------------------------------------------
+-- --
+-- GNAT LIBRARY COMPONENTS --
+-- --
+-- ADA.CONTAINERS.SYNCHRONIZED_QUEUE_INTERFACES --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 2011, Free Software Foundation, Inc. --
+-- --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the contents of the part following the private keyword. --
+-- --
+-- GNAT is free software; you can redistribute it and/or modify it under --
+-- terms of the GNU General Public License as published by the Free Soft- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- This unit was originally developed by Matthew J Heaney. --
+------------------------------------------------------------------------------
+
+generic
+ type Element_Type is private;
+
+package Ada.Containers.Synchronized_Queue_Interfaces is
+ pragma Pure;
+
+ type Queue is synchronized interface;
+
+ procedure Enqueue
+ (Container : in out Queue;
+ New_Item : Element_Type) is abstract;
+
+ -- ???
+ -- This is the official Ada 2012 syntax:
+ -- with Synchronization => By_Entry;
+
+ -- This is the temporary work-around:
+ pragma Implemented (Enqueue, By_Entry);
+
+ procedure Dequeue
+ (Container : in out Queue;
+ Element : out Element_Type) is abstract;
+
+ -- ???
+ -- This is the official Ada 2012 syntax:
+ -- with Synchronization => By_Entry;
+
+ -- This is the temporary work-around:
+ pragma Implemented (Dequeue, By_Entry);
+
+ function Current_Use (Container : Queue) return Count_Type is abstract;
+
+ function Peak_Use (Container : Queue) return Count_Type is abstract;
+
+end Ada.Containers.Synchronized_Queue_Interfaces;