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62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkDIYExplicitAssigner.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm 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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/**
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* @class vtkDIYExplicitAssigner
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* @brief assigner for use with DIY
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*
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* vtkDIYExplicitAssigner is a diy::StaticAssigner specialization that be used
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* where the block assignment is not strictly round-robin or contiguous which
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* assumes blocks equally split among ranks. This supports the case where each
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* rank has arbitrary number of blocks per rank. The constructor is provided the
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* mpi communicator and the number of local blocks. It performs parallel
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* communication to exchange information about blocks with all participating
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* ranks.
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*
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* vtkDIYExplicitAssigner also supports ability to pad each rank such that the
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* total number of blocks across all ranks is a power of two.
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*/
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#ifndef vtkDIYExplicitAssigner_h
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#define vtkDIYExplicitAssigner_h
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#include "vtkObject.h"
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#include "vtkParallelDIYModule.h" // for export macros
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// clang-format off
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#include "vtk_diy2.h"
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#include VTK_DIY2(diy/mpi.hpp)
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#include VTK_DIY2(diy/assigner.hpp)
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// clang-format on
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#ifdef _WIN32
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#pragma warning(disable : 4275) /* non dll-interface class `diy::StaticAssigner` used as base for \
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dll-interface class */
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#endif
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class VTKPARALLELDIY_EXPORT vtkDIYExplicitAssigner : public diy::StaticAssigner
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{
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public:
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vtkDIYExplicitAssigner(
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diy::mpi::communicator comm, int local_blocks, bool force_power_of_two = false);
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int rank(int gid) const override;
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void local_gids(int rank, std::vector<int>& gids) const override;
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private:
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std::vector<int> IScanBlockCounts;
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};
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#endif
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// VTK-HeaderTest-Exclude: vtkDIYExplicitAssigner.h
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