63 lines
1.7 KiB
C++
Executable File
63 lines
1.7 KiB
C++
Executable File
// Copyright (c) 2012 INRIA Sophia-Antipolis (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0+
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//
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// Author(s) : Clement Jamin
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#ifndef CGAL_CC_SAFE_HANDLE_H
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#define CGAL_CC_SAFE_HANDLE_H
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namespace CGAL {
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// CC_safe_handle is a helper that store a CC handle and its erase
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// counter value (value when the CC_safe_handle instance was created).
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// The is_zombie() function allows to know if the pointee was erased since.
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template <typename CC_iterator>
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class CC_safe_handle
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{
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public:
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CC_safe_handle(CC_iterator iterator)
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: m_handle(iterator)
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, m_erase_counter_value(iterator->erase_counter())
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{
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}
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bool is_zombie() const
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{
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return m_handle->erase_counter() != m_erase_counter_value;
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}
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CC_iterator cc_iterator() const
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{
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return m_handle;
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}
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protected:
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CC_iterator m_handle;
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unsigned int m_erase_counter_value;
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};
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template <typename CC_iterator>
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CC_safe_handle<CC_iterator> make_cc_safe_handle(CC_iterator iterator)
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{
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return CC_safe_handle<CC_iterator>(iterator);
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}
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} //namespace CGAL
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#endif // CGAL_CC_SAFE_HANDLE_H
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