File indexing completed on 2024-05-12 15:43:39

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