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   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                     S Y S T E M . P O O L _ S I Z E                      --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2005 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 2,  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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with System.Storage_Pools;
  35 with System.Storage_Elements;
  36
  37 package System.Pool_Size is
  38    pragma Elaborate_Body;
  39    --  Needed to ensure that library routines can execute allocators
  40
  41    ------------------------
  42    -- Stack_Bounded_Pool --
  43    ------------------------
  44
  45    --  Allocation strategy:
  46
  47    --    Pool is a regular stack array, no use of malloc
  48    --    user specified size
  49    --    Space of pool is globally reclaimed by normal stack management
  50
  51    --  Used in the compiler for access types with 'STORAGE_SIZE rep. clause
  52    --  Only used for allocating objects of the same type.
  53
  54    type Stack_Bounded_Pool
  55      (Pool_Size : System.Storage_Elements.Storage_Count;
  56       Elmt_Size : System.Storage_Elements.Storage_Count;
  57       Alignment : System.Storage_Elements.Storage_Count)
  58    is
  59       new System.Storage_Pools.Root_Storage_Pool with record
  60          First_Free        : System.Storage_Elements.Storage_Count;
  61          First_Empty       : System.Storage_Elements.Storage_Count;
  62          Aligned_Elmt_Size : System.Storage_Elements.Storage_Count;
  63          The_Pool          : System.Storage_Elements.Storage_Array
  64                                                        (1 .. Pool_Size);
  65       end record;
  66
  67    function Storage_Size
  68      (Pool : Stack_Bounded_Pool) return System.Storage_Elements.Storage_Count;
  69
  70    procedure Allocate
  71      (Pool         : in out Stack_Bounded_Pool;
  72       Address      : out System.Address;
  73       Storage_Size : System.Storage_Elements.Storage_Count;
  74       Alignment    : System.Storage_Elements.Storage_Count);
  75
  76    procedure Deallocate
  77      (Pool         : in out Stack_Bounded_Pool;
  78       Address      : System.Address;
  79       Storage_Size : System.Storage_Elements.Storage_Count;
  80       Alignment    : System.Storage_Elements.Storage_Count);
  81
  82    procedure Initialize (Pool : in out Stack_Bounded_Pool);
  83
  84 end System.Pool_Size;