Ifpack2 Templated Preconditioning Package  Version 1.0
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Ifpack2_LinearPartitioner_def.hpp
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42 
43 #ifndef IFPACK2_LINEAR_PARTITIONER_DEF_HPP
44 #define IFPACK2_LINEAR_PARTITIONER_DEF_HPP
45 #include "Ifpack2_ConfigDefs.hpp"
46 #include "Ifpack2_LinearPartitioner_decl.hpp"
47 
48 namespace Ifpack2 {
49 
50 //==============================================================================
51 // Constructor
52 template<class GraphType>
55  OverlappingPartitioner<GraphType> (graph)
56 {}
57 
58 
59 template<class GraphType>
61 
62 
63 template<class GraphType>
64 void
67 
68 
69 template<class GraphType>
71 {
72  using Teuchos::as;
73  // Partition_ is an array of local_ordinal_type. local_ordinal_type
74  // may be signed or unsigned. NumLocalParts_ is int, and needs to
75  // be signed, since negative values are significant. Comparisons
76  // between signed and unsigned integers often result in compiler
77  // warnings, which is why we use as() for explicit conversions
78  // below. We also use as() because in a debug build, it checks for
79  // overflow.
80  const int mod = as<int> (this->Graph_->getNodeNumRows () /
81  this->NumLocalParts_);
82  for (size_t i = 0; i < this->Graph_->getNodeNumRows (); ++i) {
83  this->Partition_[i] = as<local_ordinal_type> (i / mod);
84  if (this->Partition_[i] >= as<local_ordinal_type> (this->NumLocalParts_)) {
85  this->Partition_[i] = this->NumLocalParts_ - 1;
86  }
87  }
88 }
89 
90 
91 }// namespace Ifpack2
92 
93 #define IFPACK2_LINEARPARTITIONER_INSTANT(LO,GO,N) \
94  template class Ifpack2::LinearPartitioner<Tpetra::CrsGraph< LO, GO, N > >; \
95  template class Ifpack2::LinearPartitioner<Tpetra::RowGraph< LO, GO, N > >;
96 
97 #endif // IFPACK2_LINEARPARTITIONER_DEF_HPP
void computePartitions()
Compute the partitions.
Definition: Ifpack2_LinearPartitioner_def.hpp:70
virtual ~LinearPartitioner()
Destructor.
Definition: Ifpack2_LinearPartitioner_def.hpp:60
LinearPartitioner(const Teuchos::RCP< const row_graph_type > &graph)
Constructor.
Definition: Ifpack2_LinearPartitioner_def.hpp:54
void setPartitionParameters(Teuchos::ParameterList &List)
Set the partitioner&#39;s parameters (none for linear partitioning).
Definition: Ifpack2_LinearPartitioner_def.hpp:66
TypeTo as(const TypeFrom &t)
Create overlapping partitions of a local graph.
Definition: Ifpack2_OverlappingPartitioner_decl.hpp:78