00001 #ifndef __NOTE_H_INCLUDED__ 00002 #define __NOTE_H_INCLUDED__ 00003 00004 // $Id$ 00005 00006 //********************************************************************** 00007 // * 00008 // Description: Abstract interface for hardware to produce sound * 00009 // for a single note. * 00010 // * 00011 // Author: Chris White (whitecf@bcs.org.uk) * 00012 // * 00013 // Copyright (C) 2003 Monitor Computing Services Ltd. * 00014 // * 00015 // This program is free software; you can redistribute it and/or * 00016 // modify it under the terms of the GNU General Public License * 00017 // as published by the Free Software Foundation; either version 2 * 00018 // of the License, or any later version. * 00019 // * 00020 // This program is distributed in the hope that it will be useful, * 00021 // but WITHOUT ANY WARRANTY; without even the implied warranty of * 00022 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00023 // GNU General Public License for more details. * 00024 // * 00025 // You should have received a copy of the GNU General Public * 00026 // License (http://www.gnu.org/copyleft/gpl.html) along with this * 00027 // program; if not, write to: * 00028 // The Free Software Foundation Inc., * 00029 // 59 Temple Place - Suite 330, * 00030 // Boston, MA 02111-1307, * 00031 // USA. * 00032 // * 00033 //********************************************************************** 00034 // * 00035 // Notes: * 00036 // * 00037 //********************************************************************** 00038 00039 00040 00041 namespace Monitor { 00042 namespace Utility { 00043 00047 class Note 00048 { 00049 public: 00053 struct Busy {}; 00054 00055 00059 Note() {;} 00060 00064 virtual ~Note() {;} 00065 00071 virtual void 00072 sound() const 00073 throw (Busy) = 0; 00074 }; 00075 00076 }; // namespace Utility 00077 }; // namespace Monitor 00078 00079 #endif // __NOTE_H_INCLUDED__