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Teuchos_RCPBoostSharedPtrConversions.hpp
00001 // @HEADER
00002 // ***********************************************************************
00003 //
00004 //                    Teuchos: Common Tools Package
00005 //                 Copyright (2004) Sandia Corporation
00006 //
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 //
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov)
00025 //
00026 // ***********************************************************************
00027 // @HEADER
00028 
00029 #ifndef TEUCHOS_RCP_SHAREDPTR_CONVERSIONS_HPP
00030 #define TEUCHOS_RCP_SHAREDPTR_CONVERSIONS_HPP
00031 
00032 #include "Teuchos_RCPBoostSharedPtrConversionsDecl.hpp"
00033 #include "Teuchos_RCP.hpp"
00034 
00035 
00036 template<class T>
00037 Teuchos::RCP<T>
00038 Teuchos::rcp( const boost::shared_ptr<T> &sptr )
00039 {
00040   if (sptr.get()) {
00041     // First, see if the RCP is in the shared_ptr deleter object
00042     const RCPDeleter<T>
00043       *rcpd = boost::get_deleter<RCPDeleter<T> >(sptr);
00044     if (rcpd) {
00045       return rcpd->ptr();
00046     }
00047 #ifdef TEUCHOS_DEBUG
00048     // Second, see if the an RCP node pointing to this type already exists
00049     // from being wrapped already from a prior call to this function where the
00050     // add_new_RCPNode(...) function could have been called already!.
00051     RCPNode* existingRCPNode = RCPNodeTracer::getExistingRCPNode(sptr.get());
00052     if (existingRCPNode) {
00053       return RCP<T>(sptr.get(), RCPNodeHandle(existingRCPNode, RCP_STRONG, false));
00054     }
00055 #endif
00056     // Lastly, we just create a new RCP and RCPNode ...
00057     return rcp(sptr.get(), DeallocBoostSharedPtr<T>(sptr), true);
00058   }
00059   return null;
00060 }
00061 
00062 
00063 template<class T>
00064 boost::shared_ptr<T>
00065 Teuchos::shared_pointer( const RCP<T> &rcp )
00066 {
00067   if (nonnull(rcp)) {
00068     Ptr<const DeallocBoostSharedPtr<T> >
00069       dbsp = get_optional_dealloc<DeallocBoostSharedPtr<T> >(rcp);
00070     if (nonnull(dbsp))
00071       return dbsp->ptr();
00072     return boost::shared_ptr<T>(rcp.get(), RCPDeleter<T>(rcp));
00073   }
00074   return boost::shared_ptr<T>();
00075 }
00076 
00077 
00078 #endif  // TEUCHOS_RCP_SHAREDPTR_CONVERSIONS_HPP
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