gcc/ada/s-pooglo.adb

   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 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2009, 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_Global is
  36
  37    package SSE renames System.Storage_Elements;
  38
  39    --------------
  40    -- Allocate --
  41    --------------
  42
  43    procedure Allocate
  44      (Pool         : in out Unbounded_No_Reclaim_Pool;
  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       Allocated : System.Address;
  53
  54    begin
  55       Allocated := Memory.Alloc (Memory.size_t (Storage_Size));
  56
  57       --  The call to Alloc returns an address whose alignment is compatible
  58       --  with the worst case alignment requirement for the machine; thus the
  59       --  Alignment argument can be safely ignored.
  60
  61       if Allocated = Null_Address then
  62          raise Storage_Error;
  63       else
  64          Address := Allocated;
  65       end if;
  66    end Allocate;
  67
  68    ----------------
  69    -- Deallocate --
  70    ----------------
  71
  72    procedure Deallocate
  73      (Pool         : in out Unbounded_No_Reclaim_Pool;
  74       Address      : System.Address;
  75       Storage_Size : SSE.Storage_Count;
  76       Alignment    : SSE.Storage_Count)
  77    is
  78       pragma Warnings (Off, Pool);
  79       pragma Warnings (Off, Storage_Size);
  80       pragma Warnings (Off, Alignment);
  81
  82    begin
  83       Memory.Free (Address);
  84    end Deallocate;
  85
  86    ------------------
  87    -- Storage_Size --
  88    ------------------
  89
  90    function Storage_Size
  91      (Pool  : Unbounded_No_Reclaim_Pool)
  92       return  SSE.Storage_Count
  93    is
  94       pragma Warnings (Off, Pool);
  95
  96    begin
  97       --  Intuitively, should return System.Memory_Size. But on Sun/Alsys,
  98       --  System.Memory_Size > System.Max_Int, which means all you can do with
  99       --  it is raise CONSTRAINT_ERROR...
 100
 101       return SSE.Storage_Count'Last;
 102    end Storage_Size;
 103
 104 end System.Pool_Global;