KeyTable2Ref.hpp

/*
   Copyright (C) 2005, 2006 MySQL AB
    All rights reserved. Use is subject to license terms.

   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; version 2 of the License.

   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#ifndef KEY_TABLE2_REF_HPP
#define KEY_TABLE2_REF_HPP

#include "KeyTable2.hpp"

template <class T, class U, class V>
class KeyTable2Ref
{
  KeyTable2<U, V>& m_ref;
public:
  KeyTable2Ref(KeyTable2<U, V>& ref) :m_ref(ref) {}
  
  bool find(Ptr<T>& ptr, Uint32 key) const {
    U rec;
    rec.key = key;
    Ptr<U> tmp;
    bool ret = m_ref.find(tmp, rec);
    ptr.i = tmp.i;
    ptr.p = static_cast<T*>(tmp.p);
    return ret;
  }
  
  bool seize(Ptr<T> & ptr) {
    Ptr<U> tmp;
    bool ret = m_ref.seize(tmp);
    ptr.i = tmp.i;
    ptr.p = static_cast<T*>(tmp.p);
    return ret;
  }
  
  void add(Ptr<T> & ptr) {
    Ptr<U> tmp;
    tmp.i = ptr.i;
    tmp.p = static_cast<U*>(ptr.p);
    m_ref.add(tmp);
  }
  
  void release(Ptr<T> & ptr) {
    Ptr<U> tmp;
    tmp.i = ptr.i;
    tmp.p = static_cast<U*>(ptr.p);
    m_ref.release(tmp);
  }
};

#endif