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https://bitbucket.org/smil3y/kdelibs.git
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59 lines
2.3 KiB
C++
59 lines
2.3 KiB
C++
// -*- mode: c++; c-basic-offset: 4 -*-
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/*
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* This file is part of the KDE libraries
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* Copyright (C) 2005 Apple Computer, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef WTF_ListRefPtr_h
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#define WTF_ListRefPtr_h
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#include "RefPtr.h"
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namespace WTF {
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// Specialized version of RefPtr desgined for use in singly-linked lists.
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// Derefs the list iteratively to avoid recursive derefing that can overflow the stack.
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template <typename T> class ListRefPtr : public RefPtr<T>
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{
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public:
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ListRefPtr() : RefPtr<T>() {}
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ListRefPtr(T *ptr) : RefPtr<T>(ptr) {}
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ListRefPtr(const RefPtr<T>& o) : RefPtr<T>(o) {}
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// see comment in PassRefPtr.h for why this takes const reference
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template <typename U> ListRefPtr(const PassRefPtr<U>& o) : RefPtr<T>(o) {}
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~ListRefPtr() {
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RefPtr<T> reaper = this->release();
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while (reaper && reaper->refcount() == 1)
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reaper = reaper->releaseNext(); // implicitly protects reaper->next, then derefs reaper
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}
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ListRefPtr& operator=(T *optr) { RefPtr<T>::operator=(optr); return *this; }
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ListRefPtr& operator=(const RefPtr<T>& o) { RefPtr<T>::operator=(o); return *this; }
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ListRefPtr& operator=(const PassRefPtr<T>& o) { RefPtr<T>::operator=(o); return *this; }
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template <typename U> ListRefPtr& operator=(const RefPtr<U>& o) { RefPtr<T>::operator=(o); return *this; }
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template <typename U> ListRefPtr& operator=(const PassRefPtr<U>& o) { RefPtr<T>::operator=(o); return *this; }
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};
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} // namespace WTF
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using WTF::ListRefPtr;
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#endif // WTF_ListRefPtr_h
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