Reference documentation for deal.II version GIT 6da2e5d553 2022-07-01 18:55:02+00:00
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trilinos_tpetra_communication_pattern.cc
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2 //
3 // Copyright (C) 2018 - 2021 by the deal.II authors
4 //
5 // This file is part of the deal.II library.
6 //
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10 // version 2.1 of the License, or (at your option) any later version.
11 // The full text of the license can be found in the file LICENSE.md at
12 // the top level directory of deal.II.
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15 
17 
18 #ifdef DEAL_II_TRILINOS_WITH_TPETRA
19 
20 # include <deal.II/base/index_set.h>
21 
22 # include <Tpetra_Map.hpp>
23 
24 # include <memory>
25 
27 
28 namespace LinearAlgebra
29 {
30  namespace TpetraWrappers
31  {
33  const IndexSet &vector_space_vector_index_set,
34  const IndexSet &read_write_vector_index_set,
35  const MPI_Comm &communicator)
36  {
37  // virtual functions called in constructors and destructors never use the
38  // override in a derived class
39  // for clarity be explicit on which function is called
40  CommunicationPattern::reinit(vector_space_vector_index_set,
41  read_write_vector_index_set,
42  communicator);
43  }
44 
45 
46 
47  void
48  CommunicationPattern::reinit(const IndexSet &vector_space_vector_index_set,
49  const IndexSet &read_write_vector_index_set,
50  const MPI_Comm &communicator)
51  {
52  comm = std::make_shared<const MPI_Comm>(communicator);
53 
54  auto vector_space_vector_map =
55  Teuchos::rcp(new Tpetra::Map<int, types::global_dof_index>(
56  vector_space_vector_index_set.make_tpetra_map(*comm, false)));
57  auto read_write_vector_map =
58  Teuchos::rcp(new Tpetra::Map<int, types::global_dof_index>(
59  read_write_vector_index_set.make_tpetra_map(*comm, true)));
60 
61  // Target map is read_write_vector_map
62  // Source map is vector_space_vector_map. This map must have uniquely
63  // owned GID.
65  std::make_unique<Tpetra::Import<int, types::global_dof_index>>(
66  read_write_vector_map, vector_space_vector_map);
68  std::make_unique<Tpetra::Export<int, types::global_dof_index>>(
69  read_write_vector_map, vector_space_vector_map);
70  }
71 
72 
73 
74  const MPI_Comm &
76  {
77  return *comm;
78  }
79 
80 
81 
82  const Tpetra::Import<int, types::global_dof_index> &
84  {
85  return *tpetra_import;
86  }
87 
88 
89 
90  const Tpetra::Export<int, types::global_dof_index> &
92  {
93  return *tpetra_export;
94  }
95  } // namespace TpetraWrappers
96 } // namespace LinearAlgebra
97 
99 
100 #endif
Tpetra::Map< int, types::global_dof_index > make_tpetra_map(const MPI_Comm &communicator=MPI_COMM_WORLD, const bool overlapping=false) const
Definition: index_set.cc:708
const Tpetra::Export< int, types::global_dof_index > & get_tpetra_export() const
std::unique_ptr< Tpetra::Export< int, types::global_dof_index > > tpetra_export
std::unique_ptr< Tpetra::Import< int, types::global_dof_index > > tpetra_import
virtual void reinit(const IndexSet &vector_space_vector_index_set, const IndexSet &read_write_vector_index_set, const MPI_Comm &communicator) override
const Tpetra::Import< int, types::global_dof_index > & get_tpetra_import() const
CommunicationPattern(const IndexSet &vector_space_vector_index_set, const IndexSet &read_write_vector_index_set, const MPI_Comm &communicator)
#define DEAL_II_NAMESPACE_OPEN
Definition: config.h:442
#define DEAL_II_NAMESPACE_CLOSE
Definition: config.h:443