1------------------------------------------------------------------------------ 2-- -- 3-- GNAT LIBRARY COMPONENTS -- 4-- -- 5-- ADA.CONTAINERS.UNBOUNDED_SYNCHRONIZED_QUEUES -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 2011-2013, Free Software Foundation, Inc. -- 10-- -- 11-- This specification is derived from the Ada Reference Manual for use with -- 12-- GNAT. The copyright notice above, and the license provisions that follow -- 13-- apply solely to the contents of the part following the private keyword. -- 14-- -- 15-- GNAT is free software; you can redistribute it and/or modify it under -- 16-- terms of the GNU General Public License as published by the Free Soft- -- 17-- ware Foundation; either version 3, or (at your option) any later ver- -- 18-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 19-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 20-- or FITNESS FOR A PARTICULAR PURPOSE. -- 21-- -- 22-- As a special exception under Section 7 of GPL version 3, you are granted -- 23-- additional permissions described in the GCC Runtime Library Exception, -- 24-- version 3.1, as published by the Free Software Foundation. -- 25-- -- 26-- You should have received a copy of the GNU General Public License and -- 27-- a copy of the GCC Runtime Library Exception along with this program; -- 28-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 29-- <http://www.gnu.org/licenses/>. -- 30-- -- 31-- This unit was originally developed by Matthew J Heaney. -- 32------------------------------------------------------------------------------ 33 34with System; 35with Ada.Containers.Synchronized_Queue_Interfaces; 36with Ada.Finalization; 37 38generic 39 with package Queue_Interfaces is 40 new Ada.Containers.Synchronized_Queue_Interfaces (<>); 41 42 Default_Ceiling : System.Any_Priority := System.Priority'Last; 43 44package Ada.Containers.Unbounded_Synchronized_Queues is 45 pragma Preelaborate; 46 47 package Implementation is 48 49 -- All identifiers in this unit are implementation defined 50 51 pragma Implementation_Defined; 52 53 type List_Type is tagged limited private; 54 55 procedure Enqueue 56 (List : in out List_Type; 57 New_Item : Queue_Interfaces.Element_Type); 58 59 procedure Dequeue 60 (List : in out List_Type; 61 Element : out Queue_Interfaces.Element_Type); 62 63 function Length (List : List_Type) return Count_Type; 64 65 function Max_Length (List : List_Type) return Count_Type; 66 67 private 68 69 type Node_Type; 70 type Node_Access is access Node_Type; 71 72 type Node_Type is limited record 73 Element : Queue_Interfaces.Element_Type; 74 Next : Node_Access; 75 end record; 76 77 type List_Type is new Ada.Finalization.Limited_Controlled with record 78 First, Last : Node_Access; 79 Length : Count_Type := 0; 80 Max_Length : Count_Type := 0; 81 end record; 82 83 overriding procedure Finalize (List : in out List_Type); 84 85 end Implementation; 86 87 protected type Queue 88 (Ceiling : System.Any_Priority := Default_Ceiling) 89 with 90 Priority => Ceiling 91 is new Queue_Interfaces.Queue with 92 93 overriding entry Enqueue (New_Item : Queue_Interfaces.Element_Type); 94 95 overriding entry Dequeue (Element : out Queue_Interfaces.Element_Type); 96 97 overriding function Current_Use return Count_Type; 98 99 overriding function Peak_Use return Count_Type; 100 101 private 102 List : Implementation.List_Type; 103 end Queue; 104 105end Ada.Containers.Unbounded_Synchronized_Queues; 106