gcc/ada/s-poosiz.ads

   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 --                            $Revision: 1.1.16.1 $
  10 --                                                                          --
  11 --        Copyright (C) 1992,1993,1994 Free Software Foundation, Inc.       --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 with System.Storage_Pools;
  37 with System.Storage_Elements;
  38
  39 package System.Pool_Size is
  40
  41 pragma Elaborate_Body;
  42 --  Needed to ensure that library routines can execute allocators
  43
  44    ------------------------
  45    -- Stack_Bounded_Pool --
  46    ------------------------
  47
  48    --  Allocation strategy:
  49
  50    --    Pool is a regular stack array, no use of malloc
  51    --    user specified size
  52    --    Space of pool is globally reclaimed by normal stack management
  53
  54    --  Used in the compiler for access types with 'STORAGE_SIZE rep. clause
  55    --  Only used for allocating objects of the same type.
  56
  57    type Stack_Bounded_Pool
  58      (Pool_Size : System.Storage_Elements.Storage_Count;
  59       Elmt_Size : System.Storage_Elements.Storage_Count;
  60       Alignment : System.Storage_Elements.Storage_Count)
  61    is
  62       new System.Storage_Pools.Root_Storage_Pool with record
  63          First_Free        : System.Storage_Elements.Storage_Count;
  64          First_Empty       : System.Storage_Elements.Storage_Count;
  65          Aligned_Elmt_Size : System.Storage_Elements.Storage_Count;
  66          The_Pool          : System.Storage_Elements.Storage_Array
  67                                                        (1 .. Pool_Size);
  68       end record;
  69
  70    function Storage_Size
  71      (Pool : Stack_Bounded_Pool)
  72       return System.Storage_Elements.Storage_Count;
  73
  74    procedure Allocate
  75      (Pool         : in out Stack_Bounded_Pool;
  76       Address      : out System.Address;
  77       Storage_Size : System.Storage_Elements.Storage_Count;
  78       Alignment    : System.Storage_Elements.Storage_Count);
  79
  80    procedure Deallocate
  81      (Pool         : in out Stack_Bounded_Pool;
  82       Address      : System.Address;
  83       Storage_Size : System.Storage_Elements.Storage_Count;
  84       Alignment    : System.Storage_Elements.Storage_Count);
  85
  86    procedure Initialize (Pool : in out Stack_Bounded_Pool);
  87
  88 end System.Pool_Size;