63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
|
// Copyright (c) 2012 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 Lesser 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: LGPL-3.0+
|
||
|
|
//
|
||
|
|
// Author(s) : Clement Jamin
|
||
|
|
|
||
|
|
#ifndef CGAL_CC_SAFE_HANDLE_H
|
||
|
|
#define CGAL_CC_SAFE_HANDLE_H
|
||
|
|
|
||
|
|
namespace CGAL {
|
||
|
|
|
||
|
|
// CC_safe_handle is a helper that store a CC handle and its erase
|
||
|
|
// counter value (value when the CC_safe_handle instance was created).
|
||
|
|
// The is_zombie() function allows to know if the pointee was erased since.
|
||
|
|
template <typename CC_iterator>
|
||
|
|
class CC_safe_handle
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
CC_safe_handle(CC_iterator iterator)
|
||
|
|
: m_handle(iterator)
|
||
|
|
, m_erase_counter_value(iterator->erase_counter())
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
bool is_zombie() const
|
||
|
|
{
|
||
|
|
return m_handle->erase_counter() != m_erase_counter_value;
|
||
|
|
}
|
||
|
|
|
||
|
|
CC_iterator cc_iterator() const
|
||
|
|
{
|
||
|
|
return m_handle;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected:
|
||
|
|
CC_iterator m_handle;
|
||
|
|
unsigned int m_erase_counter_value;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename CC_iterator>
|
||
|
|
CC_safe_handle<CC_iterator> make_cc_safe_handle(CC_iterator iterator)
|
||
|
|
{
|
||
|
|
return CC_safe_handle<CC_iterator>(iterator);
|
||
|
|
}
|
||
|
|
|
||
|
|
} //namespace CGAL
|
||
|
|
|
||
|
|
#endif // CGAL_CC_SAFE_HANDLE_H
|