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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) 1992-2011, 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;
  33 with System.Storage_Elements;
  34
  35 package System.Pool_Size is
  36    pragma Elaborate_Body;
  37    --  Needed to ensure that library routines can execute allocators
  38
  39    ------------------------
  40    -- Stack_Bounded_Pool --
  41    ------------------------
  42
  43    --  Allocation strategy:
  44
  45    --    Pool is a regular stack array, no use of malloc
  46    --    user specified size
  47    --    Space of pool is globally reclaimed by normal stack management
  48
  49    --  Used in the compiler for access types with 'STORAGE_SIZE rep. clause
  50    --  Only used for allocating objects of the same type.
  51
  52    type Stack_Bounded_Pool
  53      (Pool_Size : System.Storage_Elements.Storage_Count;
  54       Elmt_Size : System.Storage_Elements.Storage_Count;
  55       Alignment : System.Storage_Elements.Storage_Count)
  56    is
  57       new System.Storage_Pools.Root_Storage_Pool with record
  58          First_Free        : System.Storage_Elements.Storage_Count;
  59          First_Empty       : System.Storage_Elements.Storage_Count;
  60          Aligned_Elmt_Size : System.Storage_Elements.Storage_Count;
  61          The_Pool          : System.Storage_Elements.Storage_Array
  62                                                        (1 .. Pool_Size);
  63       end record;
  64
  65    overriding function Storage_Size
  66      (Pool : Stack_Bounded_Pool) return System.Storage_Elements.Storage_Count;
  67
  68    overriding procedure Allocate
  69      (Pool         : in out Stack_Bounded_Pool;
  70       Address      : out System.Address;
  71       Storage_Size : System.Storage_Elements.Storage_Count;
  72       Alignment    : System.Storage_Elements.Storage_Count);
  73
  74    overriding procedure Deallocate
  75      (Pool         : in out Stack_Bounded_Pool;
  76       Address      : System.Address;
  77       Storage_Size : System.Storage_Elements.Storage_Count;
  78       Alignment    : System.Storage_Elements.Storage_Count);
  79
  80    overriding procedure Initialize (Pool : in out Stack_Bounded_Pool);
  81
  82 end System.Pool_Size;