/usr/include/qgis/qgssingleton.h is in libqgis-dev 2.8.6+dfsg-1build1.
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qgssingleton.h
--------------------------------------
Date : 24.11.2014
Copyright : (C) 2014 Matthias Kuhn
Email : matthias dot kuhn at gmx dot ch
***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#ifndef QGSSINGLETON_H
#define QGSSINGLETON_H
template <typename T>
class QgsSingleton
{
public:
static T* instance()
{
if ( sInstance == 0 )
{
sInstance = createInstance();
}
return sInstance;
}
static void cleanup()
{
delete sInstance;
sInstance = 0;
}
protected:
virtual ~QgsSingleton() {}
explicit QgsSingleton()
{
}
private:
static T* sInstance;
static T* createInstance()
{
return new T;
}
};
template <typename T> T* QgsSingleton<T>::sInstance = 0;
#endif // QGSSINGLETON_H
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