File: gnatcoll-storage_pools-alignment.ads

package info (click to toggle)
libgnatcoll 18-4
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 5,068 kB
  • sloc: ada: 40,393; python: 354; ansic: 310; makefile: 245; sh: 31
file content (67 lines) | stat: -rw-r--r-- 3,381 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
------------------------------------------------------------------------------
--                             G N A T C O L L                              --
--                                                                          --
--                     Copyright (C) 2005-2017, AdaCore                     --
--                                                                          --
-- This library is free software;  you can redistribute it and/or modify it --
-- under terms of the  GNU General Public License  as published by the Free --
-- Software  Foundation;  either version 3,  or (at your  option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY;  without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE.                            --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
------------------------------------------------------------------------------

--  This package provides a storage pool that allows you to select any
--  possible alignment for your data.
--  The alignment itself is chosen through discriminant of the pool
--  itself.
--
--      My_Pool : Unbounded_No_Reclaim_Align_Pool (Alignment => 64);
--      type My_Data is ...;
--      for My_Data'Storage_Pool use My_Pool;

with System.Storage_Pools;
with System.Storage_Elements;

package GNATCOLL.Storage_Pools.Alignment is
   pragma Elaborate_Body;
   --  Needed to ensure that library routines can execute allocators

   type Unbounded_No_Reclaim_Align_Pool
     (Alignment : System.Storage_Elements.Storage_Count)
     is new System.Storage_Pools.Root_Storage_Pool with private;
   --  A storage pool that uses malloc() internally, but always returns
   --  addresses aligned on Alignment bytes.

private
   type Unbounded_No_Reclaim_Align_Pool
     (Alignment : System.Storage_Elements.Storage_Count)
     is new System.Storage_Pools.Root_Storage_Pool with null record;

   function Storage_Size
     (Pool : Unbounded_No_Reclaim_Align_Pool)
      return System.Storage_Elements.Storage_Count;

   procedure Allocate
     (Pool         : in out Unbounded_No_Reclaim_Align_Pool;
      Address      : out System.Address;
      Storage_Size : System.Storage_Elements.Storage_Count;
      Alignment    : System.Storage_Elements.Storage_Count);

   procedure Deallocate
     (Pool         : in out Unbounded_No_Reclaim_Align_Pool;
      Address      : System.Address;
      Storage_Size : System.Storage_Elements.Storage_Count;
      Alignment    : System.Storage_Elements.Storage_Count);

end GNATCOLL.Storage_Pools.Alignment;