cac71555e2
MultiBlock now uses `diy::reduce` for reductions rather than using proxy collectives. To support using `diy::reduce` operations on a vtkm::cont::MultiBlock, added AssignerMultiBlock and DecomposerMultiBlock classes. This are helper classes that provide DIY concepts on top of a existing MultiBlock.
58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2015 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_DecomposerMultiBlock_h
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#define vtk_m_cont_DecomposerMultiBlock_h
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#include <vtkm/internal/Configure.h>
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#if defined(VTKM_ENABLE_MPI)
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#include <vtkm/cont/AssignerMultiBlock.h>
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namespace vtkm
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{
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namespace cont
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{
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/// \brief DIY Decomposer that uses `MultiBlock` existing decomposition.
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///
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/// To create partners for various reduce operations, DIY requires a decomposer.
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/// This class provides an implementation that can use the multiblock's
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/// decomposition.
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///
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class VTKM_CONT_EXPORT DecomposerMultiBlock
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{
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public:
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VTKM_CONT DecomposerMultiBlock(const diy::Assigner& assigner)
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: divisions{ assigner.nblocks() }
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{
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}
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using DivisionVector = std::vector<int>;
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/// this public member is needed to satisfy decomposer concept for
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/// partners in DIY.
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DivisionVector divisions;
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};
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}
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}
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#endif // defined(VTKM_ENABLE_MPI)
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#endif
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