gcc/ada/s-atocou.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --               S Y S T E M . A T O M I C _ C O U N T E R S                --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2011-2013, 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 --  This is dummy version of the package, for use on platforms where this
  33 --  capability is not supported. Any use of any of the routines in this
  34 --  package will raise Program_Error.
  35
  36 --  Why don't we use pragma Unimplemented_Unit in a dummy spec, this would
  37 --  seem much more useful than raising an exception at run time ???
  38
  39 package body System.Atomic_Counters is
  40
  41    ---------------
  42    -- Decrement --
  43    ---------------
  44
  45    function Decrement (Item : in out Atomic_Counter) return Boolean is
  46    begin
  47       raise Program_Error;
  48       return False;
  49    end Decrement;
  50
  51    ---------------
  52    -- Increment --
  53    ---------------
  54
  55    procedure Increment (Item : in out Atomic_Counter) is
  56    begin
  57       raise Program_Error;
  58    end Increment;
  59
  60    ----------------
  61    -- Initialize --
  62    ----------------
  63
  64    procedure Initialize (Item : out Atomic_Counter) is
  65    begin
  66       raise Program_Error;
  67    end Initialize;
  68
  69    ------------
  70    -- Is_One --
  71    ------------
  72
  73    function Is_One (Item : Atomic_Counter) return Boolean is
  74    begin
  75       raise Program_Error;
  76       return False;
  77    end Is_One;
  78
  79 end System.Atomic_Counters;