File : s-pooglo.ads
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) 1992-2015, 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 -- Storage pool corresponding to default global storage pool used for types
33 -- for which no storage pool is specified.
34
35 with System;
36 with System.Storage_Pools;
37 with System.Storage_Elements;
38
39 package 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 : aliased Unbounded_No_Reclaim_Pool;
78
79 end System.Pool_Global;