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113 | ------------------------------------------------------------------------------
-- --
-- GNAT LIBRARY COMPONENTS --
-- --
-- ADA.CONTAINERS.BOUNDED_SYNCHRONIZED_QUEUES --
-- --
-- S p e c --
-- --
-- Copyright (C) 2011-2022, 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. --
------------------------------------------------------------------------------
with System;
with Ada.Containers.Synchronized_Queue_Interfaces;
generic
with package Queue_Interfaces is
new Ada.Containers.Synchronized_Queue_Interfaces (<>);
Default_Capacity : Count_Type;
Default_Ceiling : System.Any_Priority := System.Priority'Last;
package Ada.Containers.Bounded_Synchronized_Queues with
SPARK_Mode => Off
is
pragma Annotate (CodePeer, Skip_Analysis);
pragma Preelaborate;
package Implementation is
-- All identifiers in this unit are implementation defined
pragma Implementation_Defined;
type List_Type (Capacity : Count_Type) is tagged limited private;
procedure Enqueue
(List : in out List_Type;
New_Item : Queue_Interfaces.Element_Type);
procedure Dequeue
(List : in out List_Type;
Element : out Queue_Interfaces.Element_Type);
function Length (List : List_Type) return Count_Type;
function Max_Length (List : List_Type) return Count_Type;
private
-- Need proper heap data structure here ???
-- We suppress warnings here, which might otherwise be triggered
-- by the box initialization of the Elements array below. This
-- initialization is needed to preserve constraints, such as
-- discriminant values, that the actual for Element_Type might
-- carry.
pragma Warnings (Off);
type Element_Array is
array (Count_Type range <>) of Queue_Interfaces.Element_Type;
type List_Type (Capacity : Count_Type) is tagged limited record
First, Last : Count_Type := 0;
Length : Count_Type := 0;
Max_Length : Count_Type := 0;
Elements : Element_Array (1 .. Capacity) := (others => <>);
end record;
end Implementation;
protected type Queue
(Capacity : Count_Type := Default_Capacity;
Ceiling : System.Any_Priority := Default_Ceiling)
with
Priority => Ceiling
is new Queue_Interfaces.Queue with
overriding entry Enqueue (New_Item : Queue_Interfaces.Element_Type);
overriding entry Dequeue (Element : out Queue_Interfaces.Element_Type);
overriding function Current_Use return Count_Type;
overriding function Peak_Use return Count_Type;
private
List : Implementation.List_Type (Capacity);
end Queue;
end Ada.Containers.Bounded_Synchronized_Queues;
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