NewNet/nnguardobject.h

/*  NewNet - A networking framework in C++
    Copyright (C) 2006 Ingmar K. Steen (iksteen@gmail.com)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#ifndef NEWNET_GUARDOBJECT_H
#define NEWNET_GUARDOBJECT_H

#include <vector>
#include <algorithm>

namespace NewNet
{
  class Object;


  class GuardObject
  {
  public:

    class Callback
    {
    public:
#ifndef DOXYGEN_UNDOCUMENTED
      virtual ~Callback() {}
#endif // DOXYGEN_UNDOCUMENTED


      virtual void operator()(Object * p) = 0;
    };


    GuardObject()
    {
    }

#ifndef DOXYGEN_UNDOCUMENTED
    void emit(Object * p)
    {
      std::vector<Callback *>::iterator it, end = m_Callbacks.end();
      for(it = m_Callbacks.begin(); it != end; ++it)
        (*it)->operator()(p);
    }
#endif // DOXYGEN_UNDOCUMENTED


    GuardObject & operator+=(Callback * p)
    {
      m_Callbacks.push_back(p);
      return *this;
    }


    GuardObject & operator-=(Callback * p)
    {
      m_Callbacks.erase(std::find(m_Callbacks.begin(), m_Callbacks.end(), p));
      return *this;
    }

  private:
    std::vector<Callback *> m_Callbacks;
  };
}

#endif // NEWNET_GUARDOBJECT_H

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