OSReferenced.hpp

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// Copyright (C) 2004, 2006 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// $Id: OSIpReferenced.hpp 1861 2010-12-21 21:34:47Z andreasw $
//
// Authors:  Carl Laird, Andreas Waechter     IBM    2004-08-13

// copied from IpReferenced.hpp so as to allow OS to be compiled
// stand-alone (without the Fortran implications inherent in Ipopt)

#ifndef OSREFERENCED_HPP
#define OSREFERENCED_HPP

#include <list>
#include <assert.h>

  class OSReferencer
    {}
  ;

  class OSReferencedObject
  {
  public:
    OSReferencedObject()
        :
        reference_count_(0)
    {}

    virtual ~OSReferencedObject()
    {
      assert(reference_count_ == 0);
    }

    int ReferenceCount() const;

    void AddRef(const OSReferencer* referencer) const;

    void ReleaseRef(const OSReferencer* referencer) const;

  private:
    mutable int reference_count_;
  };

  /* inline methods */
  inline
  int OSReferencedObject::ReferenceCount() const
  {
    return reference_count_;
  }

  inline
  void OSReferencedObject::AddRef(const OSReferencer* referencer) const
  {
    reference_count_++;
  }

  inline
  void OSReferencedObject::ReleaseRef(const OSReferencer* referencer) const
  {
    reference_count_--;
  }

#endif