1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                   S Y S T E M . P O O L _ G L O B A L                    --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 1992-2011, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  Storage pool corresponding to default global storage pool used for types
33--  for which no storage pool is specified.
34
35with System;
36with System.Storage_Pools;
37with System.Storage_Elements;
38
39package System.Pool_Global is
40   pragma Elaborate_Body;
41   --  Needed to ensure that library routines can execute allocators
42
43   --  Allocation strategy:
44
45   --    Call to malloc/free for each Allocate/Deallocate
46   --    No user specifiable size
47   --    No automatic reclaim
48   --    Minimal overhead
49
50   --  Pool simulating the allocation/deallocation strategy used by the
51   --  compiler for access types globally declared.
52
53   type Unbounded_No_Reclaim_Pool is new
54     System.Storage_Pools.Root_Storage_Pool with null record;
55
56   overriding function Storage_Size
57     (Pool : Unbounded_No_Reclaim_Pool)
58      return System.Storage_Elements.Storage_Count;
59
60   overriding procedure Allocate
61     (Pool         : in out Unbounded_No_Reclaim_Pool;
62      Address      : out System.Address;
63      Storage_Size : System.Storage_Elements.Storage_Count;
64      Alignment    : System.Storage_Elements.Storage_Count);
65
66   overriding procedure Deallocate
67     (Pool         : in out Unbounded_No_Reclaim_Pool;
68      Address      : System.Address;
69      Storage_Size : System.Storage_Elements.Storage_Count;
70      Alignment    : System.Storage_Elements.Storage_Count);
71
72   --  Pool object used by the compiler when implicit Storage Pool objects are
73   --  explicitly referred to. For instance when writing something like:
74   --     for T'Storage_Pool use Q'Storage_Pool;
75   --  and Q'Storage_Pool hasn't been defined explicitly.
76
77   Global_Pool_Object : Unbounded_No_Reclaim_Pool;
78
79end System.Pool_Global;
80