RefBase.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2024 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
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/* RefBase.h                                                   (C) 2000-2024 */
/*                                                                           */
/* Classe de base de la gestion des références sur une instance.             */
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#ifndef ARCCORE_BASE_REFBASE_H
#define ARCCORE_BASE_REFBASE_H
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#include "arccore/base/ExternalRef.h"
#include "arccore/base/RefDeclarations.h"
 
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namespace Arccore
{
 
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/*!
 * \brief Classe de base de gestion d'une référence.
 */
class ARCCORE_BASE_EXPORT RefBase
{
  friend class ReferenceCounterImpl;
  template <typename InstanceType> friend class impl::ReferenceCounterWrapper;
 
 protected:
 
  class ARCCORE_BASE_EXPORT BasicDeleterBase
  {
  };
 
  class ARCCORE_BASE_EXPORT DeleterBase
  {
    using ExternalRef = Internal::ExternalRef;
    friend class ReferenceCounterImpl;
 
   public:
 
    bool hasExternal() const { return m_handle.isValid(); }
    void setNoDestroy(bool x) { m_no_destroy = x; }
 
   protected:
 
    bool _destroyHandle(const void* instance, ExternalRef& handle);
    bool _destroyHandle(void* instance, ExternalRef& handle);
 
   private:
 
    bool _destroyHandleTrue(const void* instance, ExternalRef& handle);
 
   protected:
 
    DeleterBase() = default;
    DeleterBase(ExternalRef h)
    : m_handle(std::move(h))
    {}
    DeleterBase(ExternalRef h, bool no_destroy)
    : m_handle(std::move(h))
    , m_no_destroy(no_destroy)
    {}
 
   protected:
 
    //! Handle externe qui se charge de la destruction de l'instance
    Internal::ExternalRef m_handle;
    /*!
     * \brief Indique si on doit appeler le destructeur de l'instance
     * lorsqu'il n'y a plus de références dessus.
     */
    bool m_no_destroy = false;
  };
};
 
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} // namespace Arccore
 
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#endif