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 --        Copyright (C) 1992,1993,1994 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,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, 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
  39 pragma Elaborate_Body;
  40 --  Needed to ensure that library routines can execute allocators
  41
  42    ------------------------
  43    -- Stack_Bounded_Pool --
  44    ------------------------
  45
  46    --  Allocation strategy:
  47
  48    --    Pool is a regular stack array, no use of malloc
  49    --    user specified size
  50    --    Space of pool is globally reclaimed by normal stack management
  51
  52    --  Used in the compiler for access types with 'STORAGE_SIZE rep. clause
  53    --  Only used for allocating objects of the same type.
  54
  55    type Stack_Bounded_Pool
  56      (Pool_Size : System.Storage_Elements.Storage_Count;
  57       Elmt_Size : System.Storage_Elements.Storage_Count;
  58       Alignment : System.Storage_Elements.Storage_Count)
  59    is
  60       new System.Storage_Pools.Root_Storage_Pool with record
  61          First_Free        : System.Storage_Elements.Storage_Count;
  62          First_Empty       : System.Storage_Elements.Storage_Count;
  63          Aligned_Elmt_Size : System.Storage_Elements.Storage_Count;
  64          The_Pool          : System.Storage_Elements.Storage_Array
  65                                                        (1 .. Pool_Size);
  66       end record;
  67
  68    function Storage_Size
  69      (Pool : Stack_Bounded_Pool)
  70       return System.Storage_Elements.Storage_Count;
  71
  72    procedure Allocate
  73      (Pool         : in out Stack_Bounded_Pool;
  74       Address      : out System.Address;
  75       Storage_Size : System.Storage_Elements.Storage_Count;
  76       Alignment    : System.Storage_Elements.Storage_Count);
  77
  78    procedure Deallocate
  79      (Pool         : in out Stack_Bounded_Pool;
  80       Address      : System.Address;
  81       Storage_Size : System.Storage_Elements.Storage_Count;
  82       Alignment    : System.Storage_Elements.Storage_Count);
  83
  84    procedure Initialize (Pool : in out Stack_Bounded_Pool);
  85
  86 end System.Pool_Size;