1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                     S Y S T E M . P O O L _ S I Z E                      --
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
32with System.Storage_Pools;
33with System.Storage_Elements;
34
35package System.Pool_Size is
36   pragma Elaborate_Body;
37   --  Needed to ensure that library routines can execute allocators
38
39   ------------------------
40   -- Stack_Bounded_Pool --
41   ------------------------
42
43   --  Allocation strategy:
44
45   --    Pool is a regular stack array, no use of malloc
46   --    user specified size
47   --    Space of pool is globally reclaimed by normal stack management
48
49   --  Used in the compiler for access types with 'STORAGE_SIZE rep. clause
50   --  Only used for allocating objects of the same type.
51
52   type Stack_Bounded_Pool
53     (Pool_Size : System.Storage_Elements.Storage_Count;
54      Elmt_Size : System.Storage_Elements.Storage_Count;
55      Alignment : System.Storage_Elements.Storage_Count)
56   is
57      new System.Storage_Pools.Root_Storage_Pool with record
58         First_Free        : System.Storage_Elements.Storage_Count;
59         First_Empty       : System.Storage_Elements.Storage_Count;
60         Aligned_Elmt_Size : System.Storage_Elements.Storage_Count;
61         The_Pool          : System.Storage_Elements.Storage_Array
62                                                       (1 .. Pool_Size);
63      end record;
64
65   overriding function Storage_Size
66     (Pool : Stack_Bounded_Pool) return System.Storage_Elements.Storage_Count;
67
68   overriding procedure Allocate
69     (Pool         : in out Stack_Bounded_Pool;
70      Address      : out System.Address;
71      Storage_Size : System.Storage_Elements.Storage_Count;
72      Alignment    : System.Storage_Elements.Storage_Count);
73
74   overriding procedure Deallocate
75     (Pool         : in out Stack_Bounded_Pool;
76      Address      : System.Address;
77      Storage_Size : System.Storage_Elements.Storage_Count;
78      Alignment    : System.Storage_Elements.Storage_Count);
79
80   overriding procedure Initialize (Pool : in out Stack_Bounded_Pool);
81
82end System.Pool_Size;
83