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/* -*- C++ -*-
*
* singleton.h Copyright 2002 Shawn Willden <shawn@willden.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#ifndef Singleton_h
#define Singleton_h
#include "utility/noncopyable.h"
/**
* Derive your class A from Singleton<A> to make it a singleton.
* Create a single instance and then the rest of the program can find
* it with A::instance().
*/
template <class T>
class tSingleton : tNoncopyable
{
public:
static T* instance() { return instance_m; }
protected:
tSingleton() { if (!instance_m) instance_m = (T*)instance; }
~tSingleton() { instance_m = 0; }
private:
static T* instance_m;
};
#endif // Singleton_h
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