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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 --                                                                          --
  10 --        Copyright (C) 1992,1993,1994 Free Software Foundation, Inc.       --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 with System.Storage_Pools;
  36 with System.Storage_Elements;
  37
  38 package System.Pool_Size is
  39
  40 pragma Elaborate_Body;
  41 --  Needed to ensure that library routines can execute allocators
  42
  43    ------------------------
  44    -- Stack_Bounded_Pool --
  45    ------------------------
  46
  47    --  Allocation strategy:
  48
  49    --    Pool is a regular stack array, no use of malloc
  50    --    user specified size
  51    --    Space of pool is globally reclaimed by normal stack management
  52
  53    --  Used in the compiler for access types with 'STORAGE_SIZE rep. clause
  54    --  Only used for allocating objects of the same type.
  55
  56    type Stack_Bounded_Pool
  57      (Pool_Size : System.Storage_Elements.Storage_Count;
  58       Elmt_Size : System.Storage_Elements.Storage_Count;
  59       Alignment : System.Storage_Elements.Storage_Count)
  60    is
  61       new System.Storage_Pools.Root_Storage_Pool with record
  62          First_Free        : System.Storage_Elements.Storage_Count;
  63          First_Empty       : System.Storage_Elements.Storage_Count;
  64          Aligned_Elmt_Size : System.Storage_Elements.Storage_Count;
  65          The_Pool          : System.Storage_Elements.Storage_Array
  66                                                        (1 .. Pool_Size);
  67       end record;
  68
  69    function Storage_Size
  70      (Pool : Stack_Bounded_Pool)
  71       return System.Storage_Elements.Storage_Count;
  72
  73    procedure Allocate
  74      (Pool         : in out Stack_Bounded_Pool;
  75       Address      : out System.Address;
  76       Storage_Size : System.Storage_Elements.Storage_Count;
  77       Alignment    : System.Storage_Elements.Storage_Count);
  78
  79    procedure Deallocate
  80      (Pool         : in out Stack_Bounded_Pool;
  81       Address      : System.Address;
  82       Storage_Size : System.Storage_Elements.Storage_Count;
  83       Alignment    : System.Storage_Elements.Storage_Count);
  84
  85    procedure Initialize (Pool : in out Stack_Bounded_Pool);
  86
  87 end System.Pool_Size;