00001 // Package : omniEvents 00002 // Callback.h Created : 2004/07/10 00003 // Author : Alex Tingle 00004 // 00005 // Copyright (C) 2004 Alex Tingle. 00006 // 00007 // This file is part of the omniEvents application. 00008 // 00009 // omniEvents is free software; you can redistribute it and/or 00010 // modify it under the terms of the GNU Lesser General Public 00011 // License as published by the Free Software Foundation; either 00012 // version 2.1 of the License, or (at your option) any later version. 00013 // 00014 // omniEvents is distributed in the hope that it will be useful, 00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00017 // Lesser General Public License for more details. 00018 // 00019 // You should have received a copy of the GNU Lesser General Public 00020 // License along with this library; if not, write to the Free Software 00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00022 // 00023 00024 #ifndef OMNIEVENTS__CALLBACK_H 00025 #define OMNIEVENTS__CALLBACK_H 00026 00027 #ifdef HAVE_CONFIG_H 00028 # include "config.h" 00029 #endif 00030 00031 #ifdef HAVE_OMNIORB3 00032 # include <omniORB3/CORBA.h> 00033 #endif 00034 00035 #ifdef HAVE_OMNIORB4 00036 # include <omniORB4/CORBA.h> 00037 #endif 00038 00039 namespace OmniEvents { 00040 00045 class Callback 00046 { 00047 public: 00051 virtual void callback(CORBA::Request_ptr req) =0; 00052 00053 Callback():_magic(_goodMagic) 00054 {} 00055 inline bool isValid() const 00056 { return( _magic==_goodMagic ); } 00057 virtual ~Callback(); // Implementation is in Orb.cc 00058 00059 private: 00060 long _magic; 00065 static const long _goodMagic; // Implementation is in Orb.cc 00066 }; 00067 00068 }; // end namespace OmniEvents 00069 00070 #endif // OMNIEVENTS__CALLBACK_H