63 lines
1.6 KiB
C++
Executable File
63 lines
1.6 KiB
C++
Executable File
// Copyright (c) 2011 Tel-Aviv University (Israel), INRIA Sophia-Antipolis (France).
|
|
// All rights reserved.
|
|
//
|
|
// This file is part of CGAL (www.cgal.org).
|
|
// 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.
|
|
//
|
|
// Licensees holding a valid commercial license may use this file in
|
|
// accordance with the commercial license agreement provided with the software.
|
|
//
|
|
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
|
|
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
//
|
|
// $URL$
|
|
// $Id$
|
|
// SPDX-License-Identifier: GPL-3.0+
|
|
//
|
|
// Author(s) : Oren Salzman <orenzalz@post.tau.ac.il >
|
|
// Michael Hemmer <Michael.Hemmer@sophia.inria.fr>
|
|
|
|
|
|
|
|
#ifndef CGAL_SINGLETON_H_
|
|
#define SINGLETON_H_
|
|
|
|
#include <CGAL/license/Arrangement_on_surface_2.h>
|
|
|
|
|
|
#include <CGAL/assertions.h>
|
|
|
|
namespace CGAL {
|
|
namespace Arr_rational_arc {
|
|
template <class T>
|
|
class Singleton
|
|
{
|
|
public:
|
|
static T* instance()
|
|
{
|
|
if(!m_pInstance)
|
|
m_pInstance = new T;
|
|
CGAL_assertion(m_pInstance !=NULL);
|
|
return m_pInstance;
|
|
}
|
|
|
|
static void DestroyInstance()
|
|
{
|
|
delete m_pInstance;
|
|
m_pInstance = NULL;
|
|
};
|
|
private:
|
|
Singleton(); // ctor hidden
|
|
~Singleton(); // dtor hidden
|
|
private:
|
|
static T* m_pInstance;
|
|
};
|
|
|
|
template <class T> T* Singleton<T>::m_pInstance=NULL;
|
|
|
|
} // namespace Arr_rational_arc
|
|
} //namespace CGAL {
|
|
#endif // CGAL_SINGLETON_H_
|