gcc/ada/s-po32gl.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                 S Y S T E M . P O O L _ 3 2 _ G L O B A L                --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2011, 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 with System.Storage_Pools; use System.Storage_Pools;
  33 with System.Memory;
  34
  35 package body System.Pool_32_Global is
  36
  37    package SSE renames System.Storage_Elements;
  38
  39    --------------
  40    -- Allocate --
  41    --------------
  42
  43    overriding procedure Allocate
  44      (Pool         : in out Unbounded_No_Reclaim_Pool_32;
  45       Address      : out System.Address;
  46       Storage_Size : SSE.Storage_Count;
  47       Alignment    : SSE.Storage_Count)
  48    is
  49       pragma Warnings (Off, Pool);
  50       pragma Warnings (Off, Alignment);
  51
  52    begin
  53       Address := Memory.Alloc32 (Memory.size_t (Storage_Size));
  54
  55       --  The call to Alloc returns an address whose alignment is compatible
  56       --  with the worst case alignment requirement for the machine; thus the
  57       --  Alignment argument can be safely ignored.
  58
  59       if Address = Null_Address then
  60          raise Storage_Error;
  61       end if;
  62    end Allocate;
  63
  64    ----------------
  65    -- Deallocate --
  66    ----------------
  67
  68    overriding procedure Deallocate
  69      (Pool         : in out Unbounded_No_Reclaim_Pool_32;
  70       Address      : System.Address;
  71       Storage_Size : SSE.Storage_Count;
  72       Alignment    : SSE.Storage_Count)
  73    is
  74       pragma Warnings (Off, Pool);
  75       pragma Warnings (Off, Storage_Size);
  76       pragma Warnings (Off, Alignment);
  77
  78    begin
  79       Memory.Free (Address);
  80    end Deallocate;
  81
  82    ------------------
  83    -- Storage_Size --
  84    ------------------
  85
  86    overriding function Storage_Size
  87      (Pool  : Unbounded_No_Reclaim_Pool_32)
  88       return  SSE.Storage_Count
  89    is
  90       pragma Warnings (Off, Pool);
  91
  92    begin
  93       --  The 32 bit heap is limited to 2 GB of memory
  94
  95       return SSE.Storage_Count (2 ** 31);
  96    end Storage_Size;
  97
  98 end System.Pool_32_Global;