gcc/ada/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 -- 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
  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;