Teuchos_RCPStdSharedPtrConversionsDecl.hpp

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// @HEADER
// *****************************************************************************
//                    Teuchos: Common Tools Package
//
// Copyright 2004 NTESS and the Teuchos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef TEUCHOS_RCP_STD_SHAREDPTR_CONVERSIONS_DECL_HPP
#define TEUCHOS_RCP_STD_SHAREDPTR_CONVERSIONS_DECL_HPP

#include "Teuchos_RCPDecl.hpp"
#include <memory>


namespace Teuchos {


template<class T>
class DeallocStdSharedPtr
{
public:
  DeallocStdSharedPtr( const std::shared_ptr<T> &sptr ) : sptr_(sptr) {}
  typedef T ptr_t;
  void free( T* ptr_in ) const { sptr_.reset(); }
  const std::shared_ptr<T>& ptr() const { return sptr_; }
private:
  mutable std::shared_ptr<T> sptr_;
  DeallocStdSharedPtr(); // Not defined and not to be called!
};


template<class T>
class StdSharedPtrRCPDeleter
{
public:
  StdSharedPtrRCPDeleter( const RCP<T> &rcp ) : rcp_(rcp) {}
  typedef void result_type;
  typedef T * argument_type;
  void operator()(T * x) const { rcp_ = null; }
  const RCP<T>& ptr() const { return rcp_; }
private:
  mutable RCP<T> rcp_;
  StdSharedPtrRCPDeleter(); // Not defined and not to be called!
};


template<class T>
RCP<T> rcp( const std::shared_ptr<T> &sptr );


template<class T>
std::shared_ptr<T> get_shared_ptr( const RCP<T> &rcp );


template<class T> inline
bool is_null( const std::shared_ptr<T> &p )
{
  return p.get() == 0;
}


template<class T> inline
bool nonnull( const std::shared_ptr<T> &p )
{
  return p.get() != 0;
}


} // namespace Teuchos



#endif  // TEUCHOS_RCP_STD_SHAREDPTR_CONVERSIONS_DECL_HPP