Teuchos_Handle.hpp

// @HEADER
// *****************************************************************************
//                    Teuchos: Common Tools Package
//
// Copyright 2004 NTESS and the Teuchos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER
 
#ifndef TEUCHOS_HANDLE_HPP
#define TEUCHOS_HANDLE_HPP
 
#include "Teuchos_ConfigDefs.hpp"
#include "Teuchos_RCP.hpp"
#include "Teuchos_Describable.hpp"
#include "Teuchos_Handleable.hpp"
 
namespace Teuchos
{

  template <typename PointerType>
  class ConstHandle : public virtual Describable
  {
  public:
    ConstHandle(const RCP<const PointerType>& ptr) : ptr_(ptr) {;}
    explicit ConstHandle(const ConstHandleable<PointerType>* ptr) : ptr_(ptr->getConstRcp()) {;}
    const RCP<const PointerType>& constPtr() const {return ptr_;}
    const PointerType * const rawPtr() {return this->constPtr().get();}
  protected:
    explicit ConstHandle() : ptr_() {;}
    void setRcp(const RCP<PointerType>& ptr)
    {ptr_=rcp_const_cast<const PointerType>(ptr);}

    RCP<PointerType> nonConstPtr() const
    {return rcp_const_cast<PointerType>(ptr_);}
  private:
    RCP<const PointerType> ptr_;
  };

  template <typename PointerType>
  class Handle : public virtual ConstHandle<PointerType>
  {
  public:
    Handle()
      : ConstHandle<PointerType>() {}

    Handle(const RCP<PointerType>& smartPtr)
      : ConstHandle<PointerType>()
    {
      /* \brief We need to set the rcp in the base class */
      setRcp(smartPtr);
    }

    explicit Handle(Handleable<PointerType>* rawPtr)
      : ConstHandle<PointerType>()
    {
      /* \brief We need to set the rcp in the base class. */
      setRcp(rawPtr->getRcp());
    }

    RCP<PointerType> ptr() const {return this->nonConstPtr();}
    PointerType* rawPtr() const {return this->nonConstPtr().get();}
  };
 
} // namespace Teuchos

#define TEUCHOS_HANDLE_CTORS(handle, contents) \
handle() : Teuchos::Handle<contents >() {;} \
handle(Teuchos::Handleable<contents >* rawPtr) : Teuchos::Handle<contents >(rawPtr) {;} \
handle(const Teuchos::RCP<contents >& smartPtr) : Teuchos::Handle<contents >(smartPtr){;}

#define TEUCHOS_CONST_HANDLE_CTORS(handle, contents) \
handle( Teuchos::ENull _null = Teuchos::null ) : Teuchos::ConstHandle<contents >() {;} \
handle(const Teuchos::ConstHandleable<contents >* rawPtr) : Teuchos::ConstHandle<contents >(rawPtr) {;} \
handle(const Teuchos::RCP<const contents >& smartPtr) : Teuchos::ConstHandle<contents >(smartPtr){;}
 
#endif // TEUCHOS_CONSTHANDLE_HPP