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LimeReport/limereport/base/lrsingleton.h

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2016-02-17 10:11:00 +03:00
/***************************************************************************
* This file is part of the Lime Report project *
* Copyright (C) 2015 by Alexander Arin *
* arin_a@bk.ru *
* *
** GNU General Public License Usage **
* *
* This library 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 3 of the License, or *
* (at your option) any later version. *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
** GNU Lesser General Public License **
* *
* This library is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 3 of the *
* License, or (at your option) any later version. *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library. *
* If not, see <http://www.gnu.org/licenses/>. *
* *
* This library 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. *
****************************************************************************/
#ifndef LRSINGLETON_H
#define LRSINGLETON_H
#include <cstdlib>
namespace LimeReport{
template <typename T>
class Singleton
{
public:
static T& instance(){
if (0==inst){
inst = new T();
::atexit( destroy );
} else {};
return *inst;
}
private:
static T* inst;
private:
static void destroy() {
delete inst;
}
};
template <typename T>
T* Singleton< T >::inst =0;
}
#endif // LRSINGLETON_H