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, AdaCore -- 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 39package 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 -- Is_One -- 62 ------------ 63 64 function Is_One (Item : Atomic_Counter) return Boolean is 65 begin 66 raise Program_Error; 67 return False; 68 end Is_One; 69 70end System.Atomic_Counters; 71