vlSmartPointers.h

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/******************************************************************************
** Copyright (c) 1992-2010 VT MAK
** All rights reserved.
******************************************************************************/
#pragma once

#ifndef BOOST_HAS_THREADS
#define BOOST_HAS_THREADS
#endif

#include "boost_1_55/smart_ptr.hpp"

namespace DtBoost = ::boost_1_55;

#ifdef DtUSE_UTILITIES_NAMESPACE
namespace DtUSE_UTILITIES_NAMESPACE
{
#endif

template <typename T>
bool DtValidAndEqual(const DtBoost::weak_ptr<T>& wp1,
   const DtBoost::weak_ptr<T>& wp2)
{
   DtBoost::shared_ptr<T> sp1 = wp1.lock();
   DtBoost::shared_ptr<T> sp2 = wp2.lock();

   return (sp1 && sp2) && (sp1 == sp2);
}

template <typename T>
bool DtValidAndEqual(const DtBoost::shared_ptr<T>& sp1,
   const DtBoost::weak_ptr<T>& wp1)
{
   DtBoost::shared_ptr<T> sp2 = wp1.lock();
   return (sp2) && (sp1 == sp2);
}

template <typename T>
bool DtValidAndEqual(const DtBoost::weak_ptr<T>& wp1,
   const DtBoost::shared_ptr<T>& sp1)
{
   DtBoost::shared_ptr<T> sp2 = wp1.lock();
   return (sp2) && (sp1 == sp2);
}

#ifdef DtUSE_UTILITIES_NAMESPACE
} 
#endif