dtor.h

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00001 //# dtor.h: base class for notification of object destruction
00002 //# Copyright (C) 2012
00003 //# Associated Universities, Inc. Washington DC, USA.
00004 //#
00005 //# This library is free software; you can redistribute it and/or modify it
00006 //# under the terms of the GNU Library General Public License as published by
00007 //# the Free Software Foundation; either version 2 of the License, or (at your
00008 //# option) any later version.
00009 //#
00010 //# This library is distributed in the hope that it will be useful, but WITHOUT
00011 //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00012 //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00013 //# License for more details.
00014 //#
00015 //# You should have received a copy of the GNU Library General Public License
00016 //# along with this library; if not, write to the Free Software Foundation,
00017 //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
00018 //#
00019 //# Correspondence concerning AIPS++ should be addressed as follows:
00020 //#        Internet email: aips2-request@nrao.edu.
00021 //#        Postal address: AIPS++ Project Office
00022 //#                        National Radio Astronomy Observatory
00023 //#                        520 Edgemont Road
00024 //#                        Charlottesville, VA 22903-2475 USA
00025 //#
00026 //# $Id$
00027 
00028 
00029 #ifndef VIEWER_DTOR_H_
00030 #define VIEWER_DTOR_H_
00031 #include <list>
00032 
00033 namespace casa {
00034         namespace viewer {
00035 
00036                 class dtorNotifier;
00037 
00038                 class dtorNotifiee {
00039                 public:
00040                         dtorNotifiee( ) { }
00041                         virtual ~dtorNotifiee( ) { }
00042                         virtual void dtorCalled( const dtorNotifier * ) = 0;
00043                 };
00044 
00045                 class dtorNotifier {
00046                 public:
00047                         dtorNotifier( ) { }
00048                         // signals any dtorNotifiee's that are registered
00049                         ~dtorNotifier( );
00050                         void addNotifiee( dtorNotifiee * );
00051                         void removeNotifiee( dtorNotifiee * );
00052                 private:
00053                         std::list<dtorNotifiee*> registrants;
00054 
00055                 };
00056         }
00057 }
00058 
00059 #endif
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