src/lib/gnat/s-parame.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                    S Y S T E M . P A R A M E T E R S                     --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2014, 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 --  Default version used when no target-specific version is provided
  33
  34 --  This package defines some system dependent parameters for GNAT. These
  35 --  are values that are referenced by the runtime library and are therefore
  36 --  relevant to the target machine.
  37
  38 --  The parameters whose value is defined in the spec are not generally
  39 --  expected to be changed. If they are changed, it will be necessary to
  40 --  recompile the run-time library.
  41
  42 --  The parameters which are defined by functions can be changed by modifying
  43 --  the body of System.Parameters in file s-parame.adb. A change to this body
  44 --  requires only rebinding and relinking of the application.
  45
  46 --  Note: do not introduce any pragma Inline statements into this unit, since
  47 --  otherwise the relinking and rebinding capability would be deactivated.
  48
  49 package System.Parameters is
  50    pragma Pure;
  51
  52    ----------------------------------------------
  53    -- Characteristics of types in Interfaces.C --
  54    ----------------------------------------------
  55
  56    long_bits : constant := Long_Integer'Size;
  57    --  Number of bits in type long and unsigned_long. The normal convention
  58    --  is that this is the same as type Long_Integer, but this may not be true
  59    --  of all targets.
  60
  61    ptr_bits  : constant := Standard'Address_Size;
  62    --  Number of bits in Interfaces.C pointers, normally a standard address
  63
  64 end System.Parameters;