From 7471a2b4e67b7e425f02c2ca38b76be3c699627d Mon Sep 17 00:00:00 2001
From: James Turk <james.p.turk@gmail.com>
Date: Sun, 27 Feb 2005 05:50:54 +0000
Subject: [PATCH] initial import

---
 include/util/Singleton.hpp | 84 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 include/util/Singleton.hpp

diff --git a/include/util/Singleton.hpp b/include/util/Singleton.hpp
new file mode 100644
index 0000000..cb49c7f
--- /dev/null
+++ b/include/util/Singleton.hpp
@@ -0,0 +1,84 @@
+//This file is part of Photon (http://photon.sourceforge.net)
+//Copyright (C) 2004-2005 James Turk
+//
+// Author:
+//  James Turk (jpt2433@rit.edu)
+//
+// Version:
+//  $Id: Singleton.hpp,v 1.1 2005/02/27 05:50:54 cozman Exp $
+
+#ifndef PHOTON_UTIL_SINGLETON_HPP
+#define PHOTON_UTIL_SINGLETON_HPP
+
+#include <memory>
+#include <boost/utility.hpp>
+
+namespace photon
+{
+namespace util
+{
+
+template<class T>
+class Singleton : public boost::noncopyable
+{
+public:
+    static void initSingleton();
+    
+    static void destroySingleton();
+
+    static T& getSingleton();
+
+protected:    
+    virtual ~Singleton()=0;
+
+private:
+    static std::auto_ptr<T> instance_;
+};
+
+
+// template implementation
+
+template<class T>
+Singleton<T>::~Singleton() 
+{
+}
+
+template<class T>
+void Singleton<T>::initSingleton()
+{
+    assert(instance_.get() == 0);
+    
+    instance_ = std::auto_ptr<T>(new T);
+}
+
+template<class T>
+void Singleton<T>::destroySingleton()
+{
+    assert(instance_.get() != 0);
+    
+    instance_.reset();
+}
+
+template<class T>
+T& Singleton<T>::getSingleton()
+{
+    assert(instance_.get() != 0);
+    
+    return *instance_;
+}
+
+template<class T>
+std::auto_ptr<T> Singleton<T>::getSingletonPtr()
+{
+    assert(instance_.get() != 0);
+    
+    return instance_;
+}
+
+template<class T> 
+std::auto_ptr<T> Singleton<T>::instance_(0);
+
+}
+}
+
+#endif  //PHOTON_UTIL_SINGLETON_HPP