DataManage/libs/QxOrm/include/QxSerialize/Qt/QxSerialize_QSharedPointer.h

/****************************************************************************
**
** https://www.qxorm.com/
** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
**
** This file is part of the QxOrm library
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any
** damages arising from the use of this software
**
** Commercial Usage
** Licensees holding valid commercial QxOrm licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Lionel Marty
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file 'license.gpl3.txt' included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met : http://www.gnu.org/copyleft/gpl.html
**
** If you are unsure which license is appropriate for your use, or
** if you have questions regarding the use of this file, please contact :
** contact@qxorm.com
**
****************************************************************************/

#ifdef _QX_ENABLE_BOOST_SERIALIZATION
#ifndef _QX_SERIALIZE_QSHAREDPOINTER_H_
#define _QX_SERIALIZE_QSHAREDPOINTER_H_

#ifdef _MSC_VER
#pragma once
#endif

#include <boost/serialization/serialization.hpp>
#include <boost/serialization/split_free.hpp>
#include <boost/serialization/nvp.hpp>

#include <QtCore/qsharedpointer.h>
#include <QtCore/QWeakPointer>
#include <QtCore/qhash.h>

namespace boost {
namespace serialization {

template <class Archive, typename T>
inline void save(Archive & ar, const QSharedPointer<T> & t, const unsigned int file_version)
{
   Q_UNUSED(file_version);
   const T * ptr = t.data();
   ar << boost::serialization::make_nvp("qt_shared_ptr", ptr);
}

template <class Archive, typename T>
inline void load(Archive & ar, QSharedPointer<T> & t, const unsigned int file_version)
{
   Q_UNUSED(file_version);
   static QHash<void *, QWeakPointer<T> > listOfWeakPointers;
   T * ptr = NULL; ar >> boost::serialization::make_nvp("qt_shared_ptr", ptr);
   if (! ptr) { t = QSharedPointer<T>(); return; }

   void * pVoid = static_cast<void *>(ptr);
   QSharedPointer<T> pShared = (listOfWeakPointers.contains(pVoid) ? listOfWeakPointers.value(pVoid).toStrongRef() : QSharedPointer<T>());
   if (pShared) { t = pShared; return; }
   t = QSharedPointer<T>(ptr);
   QWeakPointer<T> pWeak = t;
   listOfWeakPointers.insert(pVoid, pWeak);

   static int iLoadCount = 0;
   iLoadCount++; if (iLoadCount <= 1000) { return; }
   QMutableHashIterator<void *, QWeakPointer<T> > itr(listOfWeakPointers);
   while (itr.hasNext()) { itr.next(); if (itr.value().isNull()) { itr.remove(); } }
   iLoadCount = 0;
}

template <class Archive, typename T>
inline void serialize(Archive & ar, QSharedPointer<T> & t, const unsigned int file_version)
{
   boost::serialization::split_free(ar, t, file_version);
}

} // namespace boost
} // namespace serialization

#endif // _QX_SERIALIZE_QSHAREDPOINTER_H_
#endif // _QX_ENABLE_BOOST_SERIALIZATION