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) 1992,1993,1994 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 2,  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.  See the GNU General Public License --
17-- for  more details.  You should have  received  a copy of the GNU General --
18-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
19-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
20-- MA 02111-1307, USA.                                                      --
21--                                                                          --
22-- As a special exception,  if other files  instantiate  generics from this --
23-- unit, or you link  this unit with other files  to produce an executable, --
24-- this  unit  does not  by itself cause  the resulting  executable  to  be --
25-- covered  by the  GNU  General  Public  License.  This exception does not --
26-- however invalidate  any other reasons why  the executable file  might be --
27-- covered by the  GNU Public License.                                      --
28--                                                                          --
29-- GNAT was originally developed  by the GNAT team at  New York University. --
30-- Extensive contributions were provided by Ada Core Technologies Inc.      --
31--                                                                          --
32------------------------------------------------------------------------------
33
34with System.Storage_Pools;
35with System.Storage_Elements;
36
37package System.Pool_Size is
38
39pragma Elaborate_Body;
40--  Needed to ensure that library routines can execute allocators
41
42   ------------------------
43   -- Stack_Bounded_Pool --
44   ------------------------
45
46   --  Allocation strategy:
47
48   --    Pool is a regular stack array, no use of malloc
49   --    user specified size
50   --    Space of pool is globally reclaimed by normal stack management
51
52   --  Used in the compiler for access types with 'STORAGE_SIZE rep. clause
53   --  Only used for allocating objects of the same type.
54
55   type Stack_Bounded_Pool
56     (Pool_Size : System.Storage_Elements.Storage_Count;
57      Elmt_Size : System.Storage_Elements.Storage_Count;
58      Alignment : System.Storage_Elements.Storage_Count)
59   is
60      new System.Storage_Pools.Root_Storage_Pool with record
61         First_Free        : System.Storage_Elements.Storage_Count;
62         First_Empty       : System.Storage_Elements.Storage_Count;
63         Aligned_Elmt_Size : System.Storage_Elements.Storage_Count;
64         The_Pool          : System.Storage_Elements.Storage_Array
65                                                       (1 .. Pool_Size);
66      end record;
67
68   function Storage_Size
69     (Pool : Stack_Bounded_Pool)
70      return System.Storage_Elements.Storage_Count;
71
72   procedure Allocate
73     (Pool         : in out Stack_Bounded_Pool;
74      Address      : out System.Address;
75      Storage_Size : System.Storage_Elements.Storage_Count;
76      Alignment    : System.Storage_Elements.Storage_Count);
77
78   procedure Deallocate
79     (Pool         : in out Stack_Bounded_Pool;
80      Address      : System.Address;
81      Storage_Size : System.Storage_Elements.Storage_Count;
82      Alignment    : System.Storage_Elements.Storage_Count);
83
84   procedure Initialize (Pool : in out Stack_Bounded_Pool);
85
86end System.Pool_Size;
87