54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
// 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)
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/STL_Extension/include/CGAL/CC_safe_handle.h $
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// $Id: CC_safe_handle.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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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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