MachineMemoryWindowBase.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2025 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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/* MachineMemoryWindowBase.h                                   (C) 2000-2025 */
/*                                                                           */
/* Classe permettant de créer une fenêtre mémoire partagée entre les         */
/* processus d'un même noeud.                                                */
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#ifndef ARCANE_CORE_MACHINEMEMORYWINDOWBASE_H
#define ARCANE_CORE_MACHINEMEMORYWINDOWBASE_H
 
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#include "arcane/core/ArcaneTypes.h"
#include "arcane/utils/Ref.h"
 
#include "arccore/base/Span.h"
 
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namespace Arcane
{
 
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class IParallelMng;
class IParallelMngInternal;
namespace MessagePassing
{
  class IMachineMemoryWindowBaseInternal;
}
 
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class ARCANE_CORE_EXPORT MachineMemoryWindowBase
{
 public:

  MachineMemoryWindowBase(IParallelMng* pm, Int64 sizeof_segment, Int32 sizeof_elem);
 
 public:

  Span<std::byte> segmentView() const;

  Span<std::byte> segmentView(Int32 rank) const;

  Span<std::byte> windowView() const;

  Span<const std::byte> segmentConstView() const;

  Span<const std::byte> segmentConstView(Int32 rank) const;

  Span<const std::byte> windowConstView() const;

  void resizeSegment(Integer new_size) const;

  ConstArrayView<Int32> machineRanks() const;

  void barrier() const;
 
 private:
 
  IParallelMngInternal* m_pm_internal;
  Ref<MessagePassing::IMachineMemoryWindowBaseInternal> m_node_window_base;
  Int32 m_sizeof_elem;
};
 
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} // End namespace Arcane
 
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#endif