| -- Copyright 2008-2012 Free Software Foundation, Inc. |
| -- |
| -- This program is free software; you can redistribute it and/or modify |
| -- it under the terms of the GNU General Public License as published by |
| -- the Free Software Foundation; either version 3 of the License, or |
| -- (at your option) any later version. |
| -- |
| -- This program is distributed in the hope that it will be useful, |
| -- but WITHOUT ANY WARRANTY; without even the implied warranty of |
| -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| -- GNU General Public License for more details. |
| -- |
| -- You should have received a copy of the GNU General Public License |
| -- along with this program. If not, see <http://www.gnu.org/licenses/>. |
| |
| package body Pck is |
| |
| type Data_T is (One, Two, Three); |
| pragma Atomic (Data_T); |
| |
| Data_Flag : Data_T := One; |
| |
| procedure Increment is |
| begin |
| if Data_Flag = Data_T'Last then |
| Data_Flag := Data_T'First; |
| else |
| Data_Flag := Data_T'Succ (Data_Flag); |
| end if; |
| end Increment; |
| |
| function Is_First return Boolean is |
| begin |
| return Data_Flag = Data_T'First; |
| end Is_First; |
| |
| end Pck; |
