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+------------------------------------------------------------------------------
+-- --
+-- GNAT LIBRARY COMPONENTS --
+-- --
+-- A D A . C O N T A I N E R S . H A S H _ T A B L E S --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 2004-2011, Free Software Foundation, Inc. --
+-- --
+-- 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. --
+------------------------------------------------------------------------------
+
+-- This package declares the hash-table type used to implement hashed
+-- containers.
+
+package Ada.Containers.Hash_Tables is
+ pragma Pure;
+ -- Declare Pure so this can be imported by Remote_Types packages
+
+ generic
+ type Node_Type (<>) is limited private;
+
+ type Node_Access is access Node_Type;
+
+ package Generic_Hash_Table_Types is
+ type Buckets_Type is array (Hash_Type range <>) of Node_Access;
+
+ type Buckets_Access is access all Buckets_Type;
+ for Buckets_Access'Storage_Size use 0;
+ -- Storage_Size of zero so this package can be Pure
+
+ type Hash_Table_Type is tagged record
+ Buckets : Buckets_Access;
+ Length : Count_Type := 0;
+ Busy : Natural := 0;
+ Lock : Natural := 0;
+ end record;
+ end Generic_Hash_Table_Types;
+
+ generic
+ type Node_Type is private;
+ package Generic_Bounded_Hash_Table_Types is
+ type Nodes_Type is array (Count_Type range <>) of Node_Type;
+ type Buckets_Type is array (Hash_Type range <>) of Count_Type;
+
+ type Hash_Table_Type
+ (Capacity : Count_Type;
+ Modulus : Hash_Type) is
+ tagged record
+ Length : Count_Type := 0;
+ Busy : Natural := 0;
+ Lock : Natural := 0;
+ Free : Count_Type'Base := -1;
+ Nodes : Nodes_Type (1 .. Capacity) := (others => <>);
+ Buckets : Buckets_Type (1 .. Modulus) := (others => 0);
+ end record;
+ end Generic_Bounded_Hash_Table_Types;
+
+end Ada.Containers.Hash_Tables;