Reference documentation for deal.II version 9.4.1
Searching...
No Matches
TrilinosWrappers::SparseMatrixIterators::Accessor< false > Class Reference

#include <deal.II/lac/trilinos_sparse_matrix.h>

Inheritance diagram for TrilinosWrappers::SparseMatrixIterators::Accessor< false >:
[legend]

class  Reference

## Public Types

using MatrixType = SparseMatrix

using size_type = ::types::global_dof_index

## Public Member Functions

Accessor (MatrixType *matrix, const size_type row, const size_type index)

Reference value () const

size_type row () const

size_type index () const

size_type column () const

## Protected Member Functions

void visit_present_row ()

## Protected Attributes

SparseMatrixmatrix

size_type a_row

size_type a_index

std::shared_ptr< std::vector< size_type > > colnum_cache

std::shared_ptr< std::vector< TrilinosScalar > > value_cache

template<bool >
class Iterator

class Reference

## Detailed Description

The specialization for a mutable Accessor.

Definition at line 257 of file trilinos_sparse_matrix.h.

## ◆ MatrixType

 using TrilinosWrappers::SparseMatrixIterators::Accessor< false >::MatrixType = SparseMatrix

Typedef for the type (including constness) of the matrix to be used here.

Definition at line 315 of file trilinos_sparse_matrix.h.

## ◆ size_type

 inherited

Declare the type for container size.

Definition at line 114 of file trilinos_sparse_matrix.h.

## ◆ Accessor()

 TrilinosWrappers::SparseMatrixIterators::Accessor< false >::Accessor ( MatrixType * matrix, const size_type row, const size_type index )

Constructor. Since we use accessors only for read access, a const matrix pointer is sufficient.

## ◆ value()

 Reference TrilinosWrappers::SparseMatrixIterators::Accessor< false >::value ( ) const

Value of this matrix entry.

## ◆ row()

 size_type TrilinosWrappers::SparseMatrixIterators::AccessorBase::row ( ) const
inherited

Row number of the element represented by this object.

## ◆ index()

 size_type TrilinosWrappers::SparseMatrixIterators::AccessorBase::index ( ) const
inherited

Index in row of the element represented by this object.

## ◆ column()

 size_type TrilinosWrappers::SparseMatrixIterators::AccessorBase::column ( ) const
inherited

Column number of the element represented by this object.

## ◆ visit_present_row()

 void TrilinosWrappers::SparseMatrixIterators::AccessorBase::visit_present_row ( )
protectedinherited

Discard the old row caches (they may still be used by other accessors) and generate new ones for the row pointed to presently by this accessor.

Definition at line 144 of file trilinos_sparse_matrix.cc.

## ◆ Iterator

template<bool >
 friend class Iterator
friend

Definition at line 332 of file trilinos_sparse_matrix.h.

## ◆ Reference

 friend class Reference
friend

Definition at line 335 of file trilinos_sparse_matrix.h.

## ◆ matrix

 SparseMatrix* TrilinosWrappers::SparseMatrixIterators::AccessorBase::matrix
mutableprotectedinherited

Pointer to the matrix object. This object should be handled as a const pointer or non-const by the appropriate derived classes. In order to be able to implement both, it is not const here, so handle with care!

Definition at line 148 of file trilinos_sparse_matrix.h.

## ◆ a_row

 size_type TrilinosWrappers::SparseMatrixIterators::AccessorBase::a_row
protectedinherited

Current row number.

Definition at line 152 of file trilinos_sparse_matrix.h.

## ◆ a_index

 size_type TrilinosWrappers::SparseMatrixIterators::AccessorBase::a_index
protectedinherited

Current index in row.

Definition at line 157 of file trilinos_sparse_matrix.h.

## ◆ colnum_cache

 std::shared_ptr > TrilinosWrappers::SparseMatrixIterators::AccessorBase::colnum_cache
protectedinherited

Cache where we store the column indices of the present row. This is necessary, since Trilinos makes access to the elements of its matrices rather hard, and it is much more efficient to copy all column entries of a row once when we enter it than repeatedly asking Trilinos for individual ones. This also makes some sense since it is likely that we will access them sequentially anyway.

In order to make copying of iterators/accessor of acceptable performance, we keep a shared pointer to these entries so that more than one accessor can access this data if necessary.

Definition at line 179 of file trilinos_sparse_matrix.h.

## ◆ value_cache

 std::shared_ptr > TrilinosWrappers::SparseMatrixIterators::AccessorBase::value_cache
protectedinherited

Cache for the values of this row.

Definition at line 184 of file trilinos_sparse_matrix.h.

The documentation for this class was generated from the following file: