77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
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/*
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SINGLETON.hpp - template for implementing the singleton pattern
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Copyright (C) CinelerraCV
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2007, Christian Thaeter <ct@pipapo.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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====================================================================
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This code is heavily inspired by
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The Loki Library (loki-lib/trunk/include/loki/Singleton.h)
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Copyright (c) 2001 by Andrei Alexandrescu
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This Loki code accompanies the book:
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Alexandrescu, Andrei. "Modern C++ Design: Generic Programming
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and Design Patterns Applied".
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Copyright (c) 2001. Addison-Wesley. ISBN 0201704315
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*/
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#ifndef CINELERRA_SINGLETON_H
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#define CINELERRA_SINGLETON_H
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#include "common/singletonpolicies.hpp" ///< several Policies usable together with singleton
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namespace cinelerra
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{
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/**
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* A configurable Template for implementing Singletons
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*/
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template
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< class S, // the class to make Singleton
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template <class> class Create = singleton::Static, // how to create/destroy the instance
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template <class> class Life = singleton::Automatic, // how to manage Singleton Lifecycle
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template <class> class Threading = singleton::IgnoreThreadsafety //TODO use Multithreaded!!!
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>
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class Singleton
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{
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public:
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static S& instance();
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private:
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typedef Threading<S>::VolatileType SType;
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typedef Threading<S>::Lock ThreadLock;
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static SType* pInstance_;
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static bool isDead_;
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protected:
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Singleton () { }
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Singleton (const Singleton&) { }
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Singleton& operator= (const Singleton&) { return *this; }
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private:
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static void destroy();
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};
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} // namespace cinelerra
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#endif
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