Teuchos_RCPBoostSharedPtrConversions.hpp

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// ***********************************************************************
//
//                    Teuchos: Common Tools Package
//                 Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
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#ifndef TEUCHOS_RCP_SHAREDPTR_CONVERSIONS_HPP
#define TEUCHOS_RCP_SHAREDPTR_CONVERSIONS_HPP

#include "Teuchos_RCPBoostSharedPtrConversionsDecl.hpp"
#include "Teuchos_RCP.hpp"


template<class T>
Teuchos::RCP<T>
Teuchos::rcp( const boost::shared_ptr<T> &sptr )
{
  if (sptr.get()) {
    // First, see if the RCP is in the shared_ptr deleter object
    const RCPDeleter<T>
      *rcpd = boost::get_deleter<RCPDeleter<T> >(sptr);
    if (rcpd) {
      return rcpd->ptr();
    }
#ifdef TEUCHOS_DEBUG
    // Second, see if the an RCP node pointing to this type already exists
    // from being wrapped already from a prior call to this function where the
    // add_new_RCPNode(...) function could have been called already!.
    RCPNode* existingRCPNode = RCPNodeTracer::getExistingRCPNode(sptr.get());
    if (existingRCPNode) {
      return RCP<T>(sptr.get(), RCPNodeHandle(existingRCPNode, RCP_STRONG, false));
    }
#endif
    // Lastly, we just create a new RCP and RCPNode ...
    return rcp(sptr.get(), DeallocBoostSharedPtr<T>(sptr), true);
  }
  return null;
}


template<class T>
boost::shared_ptr<T>
Teuchos::shared_pointer( const RCP<T> &rcp )
{
  if (nonnull(rcp)) {
    Ptr<const DeallocBoostSharedPtr<T> >
      dbsp = get_optional_dealloc<DeallocBoostSharedPtr<T> >(rcp);
    if (nonnull(dbsp))
      return dbsp->ptr();
    return boost::shared_ptr<T>(rcp.get(), RCPDeleter<T>(rcp));
  }
  return boost::shared_ptr<T>();
}


#endif  // TEUCHOS_RCP_SHAREDPTR_CONVERSIONS_HPP