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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2007 Georgia Tech Research Corporation |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation; |
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* |
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* This program 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 |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* Author: George Riley <riley@ece.gatech.edu> |
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* Adapted from original code in object.h by: |
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* Authors: Gustavo Carneiro <gjcarneiro@gmail.com>, |
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* Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
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*/ |
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#ifndef __REF_COUNT_BASE_H__ |
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#define __REF_COUNT_BASE_H__ |
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|
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#include <stdint.h> |
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/** |
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* \brief a base class that provides implementations of reference counting |
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* operations. |
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* |
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* A base class that provides implementations of reference counting |
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* operations, for classes that wish to use the templatized smart |
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* pointer for memory management but that do not wish to derive from |
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* class ns3::Object. |
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* |
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*/ |
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class RefCountBase |
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{ |
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public: |
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RefCountBase(); |
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virtual ~RefCountBase (); |
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/** |
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* Increment the reference count. This method should not be called |
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* by user code. RefCountBase instances are expected to be used in |
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* conjunction with the Ptr template which would make calling Ref |
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* unecessary and dangerous. |
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*/ |
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inline void Ref () const; |
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/** |
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* Decrement the reference count. This method should not be called |
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* by user code. RefCountBase instances are expected to be used in |
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* conjunction with the Ptr template which would make calling Ref |
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* unecessary and dangerous. |
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*/ |
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inline void Unref () const; |
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private: |
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// Note we make this mutable so that the const methods can still |
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// change it. |
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mutable uint32_t m_count; // Reference count |
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}; |
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|
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// Implementation of the in-line methods |
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void |
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RefCountBase::Ref () const |
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{ |
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m_count++; |
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} |
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|
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void |
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RefCountBase::Unref () const |
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{ |
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if (--m_count == 0) |
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{ // All references removed, ok to delete |
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delete this; |
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} |
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} |
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#endif |