File : s-poosiz.ads
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) 1992-2010, 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 -- --
19 -- --
20 -- --
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 with System.Storage_Pools;
33 with System.Storage_Elements;
34
35 package 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
82 end System.Pool_Size;