![]() |
Reference documentation for deal.II version 9.6.0
|
#include <deal.II/lac/block_sparse_matrix_ez.h>
Public Types | |
using | size_type = types::global_dof_index |
Public Member Functions | |
BlockSparseMatrixEZ ()=default | |
BlockSparseMatrixEZ (const unsigned int block_rows, const unsigned int block_cols) | |
BlockSparseMatrixEZ (const BlockSparseMatrixEZ< Number > &) | |
BlockSparseMatrixEZ & | operator= (const BlockSparseMatrixEZ< Number > &) |
BlockSparseMatrixEZ & | operator= (const double d) |
void | clear () |
void | reinit (const unsigned int n_block_rows, const unsigned int n_block_cols) |
void | collect_sizes () |
SparseMatrixEZ< Number > & | block (const unsigned int row, const unsigned int column) |
const SparseMatrixEZ< Number > & | block (const unsigned int row, const unsigned int column) const |
unsigned int | n_block_rows () const |
unsigned int | n_block_cols () const |
bool | empty () const |
size_type | m () const |
size_type | n () const |
void | set (const size_type i, const size_type j, const Number value) |
void | add (const size_type i, const size_type j, const Number value) |
template<typename somenumber > | |
void | vmult (BlockVector< somenumber > &dst, const BlockVector< somenumber > &src) const |
template<typename somenumber > | |
void | Tvmult (BlockVector< somenumber > &dst, const BlockVector< somenumber > &src) const |
template<typename somenumber > | |
void | vmult_add (BlockVector< somenumber > &dst, const BlockVector< somenumber > &src) const |
template<typename somenumber > | |
void | Tvmult_add (BlockVector< somenumber > &dst, const BlockVector< somenumber > &src) const |
template<typename StreamType > | |
void | print_statistics (StreamType &s, bool full=false) |
template<class Archive > | |
void | serialize (Archive &ar, const unsigned int version) |
Subscriptor functionality | |
Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class. | |
void | subscribe (std::atomic< bool > *const validity, const std::string &identifier="") const |
void | unsubscribe (std::atomic< bool > *const validity, const std::string &identifier="") const |
unsigned int | n_subscriptions () const |
template<typename StreamType > | |
void | list_subscribers (StreamType &stream) const |
void | list_subscribers () const |
Static Public Member Functions | |
static ::ExceptionBase & | ExcInUse (int arg1, std::string arg2, std::string arg3) |
static ::ExceptionBase & | ExcNoSubscriber (std::string arg1, std::string arg2) |
Private Types | |
using | map_value_type = decltype(counter_map)::value_type |
using | map_iterator = decltype(counter_map)::iterator |
Private Member Functions | |
void | check_no_subscribers () const noexcept |
Private Attributes | |
BlockIndices | row_indices |
BlockIndices | column_indices |
Table< 2, SparseMatrixEZ< Number > > | blocks |
std::atomic< unsigned int > | counter |
std::map< std::string, unsigned int > | counter_map |
std::vector< std::atomic< bool > * > | validity_pointers |
const std::type_info * | object_info |
Static Private Attributes | |
static std::mutex | mutex |
A block matrix consisting of blocks of type SparseMatrixEZ.
Like the other Block-objects, this matrix can be used like a SparseMatrixEZ, when it comes to access to entries. Then, there are functions for the multiplication with BlockVector and access to the individual blocks.
Definition at line 60 of file block_sparse_matrix_ez.h.
using BlockSparseMatrixEZ< Number >::size_type = types::global_dof_index |
Declare type for container size.
Definition at line 66 of file block_sparse_matrix_ez.h.
|
privateinherited |
The data type used in counter_map.
Definition at line 229 of file subscriptor.h.
|
privateinherited |
The iterator type used in counter_map.
Definition at line 234 of file subscriptor.h.
|
default |
Default constructor. The result is an empty object with zero dimensions.
BlockSparseMatrixEZ< Number >::BlockSparseMatrixEZ | ( | const unsigned int | block_rows, |
const unsigned int | block_cols ) |
Constructor setting up an object with given number of block rows and columns. The blocks themselves still have zero dimension.
BlockSparseMatrixEZ< Number >::BlockSparseMatrixEZ | ( | const BlockSparseMatrixEZ< Number > & | ) |
Copy constructor. This is needed for some container classes. It creates an object of the same number of block rows and columns. Since it calls the copy constructor of SparseMatrixEZ, the block s must be empty.
BlockSparseMatrixEZ & BlockSparseMatrixEZ< Number >::operator= | ( | const BlockSparseMatrixEZ< Number > & | ) |
Copy operator. Like the copy constructor, this may be called for objects with empty blocks only.
BlockSparseMatrixEZ & BlockSparseMatrixEZ< Number >::operator= | ( | const double | d | ) |
This operator assigns a scalar to a matrix. Since this does usually not make much sense (should we set all matrix entries to this value? Only the nonzero entries of the sparsity pattern?), this operation is only allowed if the actual value to be assigned is zero. This operator only exists to allow for the obvious notation matrix=0
, which sets all elements of the matrix to zero, but keep the sparsity pattern previously used.
void BlockSparseMatrixEZ< Number >::clear | ( | ) |
Set matrix to zero dimensions and release memory.
void BlockSparseMatrixEZ< Number >::reinit | ( | const unsigned int | n_block_rows, |
const unsigned int | n_block_cols ) |
Initialize to given block numbers. After this operation, the matrix will have the block dimensions provided. Each block will have zero dimensions and must be initialized subsequently. After setting the sizes of the blocks, collect_sizes() must be called to update internal data structures.
void BlockSparseMatrixEZ< Number >::collect_sizes | ( | ) |
This function collects the sizes of the sub-objects and stores them in internal arrays, in order to be able to relay global indices into the matrix to indices into the subobjects. You must call this function each time after you have changed the size of the sub-objects.
|
inline |
Access the block with the given coordinates.
Definition at line 290 of file block_sparse_matrix_ez.h.
|
inline |
Access the block with the given coordinates. Version for constant objects.
Definition at line 303 of file block_sparse_matrix_ez.h.
|
inline |
Return the number of blocks in a column.
Definition at line 272 of file block_sparse_matrix_ez.h.
|
inline |
Return the number of blocks in a row.
Definition at line 281 of file block_sparse_matrix_ez.h.
bool BlockSparseMatrixEZ< Number >::empty | ( | ) | const |
Return whether the object is empty. It is empty if no memory is allocated, which is the same as that both dimensions are zero. This function is just the concatenation of the respective call to all sub-matrices.
|
inline |
Return number of rows of this matrix, which equals the dimension of the codomain (or range) space. It is the sum of the number of rows over the sub-matrix blocks of this matrix. Recall that the matrix is of size m() times n().
Definition at line 316 of file block_sparse_matrix_ez.h.
|
inline |
Return number of columns of this matrix, which equals the dimension of the domain space. It is the sum of the number of columns over the sub-matrix blocks of this matrix. Recall that the matrix is of size m() times n().
Definition at line 325 of file block_sparse_matrix_ez.h.
|
inline |
Set the element (i,j)
to value
. Throws an error if the entry does not exist or if value
is not a finite number. Still, it is allowed to store zero values in non-existent fields.
Definition at line 334 of file block_sparse_matrix_ez.h.
|
inline |
Add value
to the element (i,j)
. Throws an error if the entry does not exist or if value
is not a finite number. Still, it is allowed to store zero values in non-existent fields.
Definition at line 352 of file block_sparse_matrix_ez.h.
void BlockSparseMatrixEZ< Number >::vmult | ( | BlockVector< somenumber > & | dst, |
const BlockVector< somenumber > & | src ) const |
Matrix-vector multiplication: let \(dst = M*src\) with \(M\) being this matrix.
Definition at line 370 of file block_sparse_matrix_ez.h.
void BlockSparseMatrixEZ< Number >::Tvmult | ( | BlockVector< somenumber > & | dst, |
const BlockVector< somenumber > & | src ) const |
Matrix-vector multiplication: let \(dst = M^T*src\) with \(M\) being this matrix. This function does the same as vmult() but takes the transposed matrix.
Definition at line 408 of file block_sparse_matrix_ez.h.
void BlockSparseMatrixEZ< Number >::vmult_add | ( | BlockVector< somenumber > & | dst, |
const BlockVector< somenumber > & | src ) const |
Adding Matrix-vector multiplication. Add \(M*src\) on \(dst\) with \(M\) being this matrix.
Definition at line 390 of file block_sparse_matrix_ez.h.
void BlockSparseMatrixEZ< Number >::Tvmult_add | ( | BlockVector< somenumber > & | dst, |
const BlockVector< somenumber > & | src ) const |
Adding Matrix-vector multiplication. Add \(M^T*src\) to \(dst\) with \(M\) being this matrix. This function does the same as vmult_add() but takes the transposed matrix.
Definition at line 428 of file block_sparse_matrix_ez.h.
|
inline |
Print statistics. If full
is true
, prints a histogram of all existing row lengths and allocated row lengths. Otherwise, just the relation of allocated and used entries is shown.
Definition at line 446 of file block_sparse_matrix_ez.h.
|
inherited |
Subscribes a user of the object by storing the pointer validity
. The subscriber may be identified by text supplied as identifier
.
Definition at line 135 of file subscriptor.cc.
|
inherited |
Unsubscribes a user from the object.
identifier
and the validity
pointer must be the same as the one supplied to subscribe(). Definition at line 155 of file subscriptor.cc.
|
inlineinherited |
Return the present number of subscriptions to this object. This allows to use this class for reference counted lifetime determination where the last one to unsubscribe also deletes the object.
Definition at line 300 of file subscriptor.h.
|
inlineinherited |
List the subscribers to the input stream
.
Definition at line 317 of file subscriptor.h.
|
inherited |
List the subscribers to deallog
.
Definition at line 203 of file subscriptor.cc.
|
inlineinherited |
Read or write the data of this object to or from a stream for the purpose of serialization using the BOOST serialization library.
This function does not actually serialize any of the member variables of this class. The reason is that what this class stores is only who subscribes to this object, but who does so at the time of storing the contents of this object does not necessarily have anything to do with who subscribes to the object when it is restored. Consequently, we do not want to overwrite the subscribers at the time of restoring, and then there is no reason to write the subscribers out in the first place.
Definition at line 309 of file subscriptor.h.
|
privatenoexceptinherited |
Check that there are no objects subscribing to this object. If this check passes then it is safe to destroy the current object. It this check fails then this function will either abort or print an error message to deallog (by using the AssertNothrow mechanism), but will not throw an exception.
Definition at line 52 of file subscriptor.cc.
|
private |
Object storing and managing the transformation of row indices to indices of the sub-objects.
Definition at line 252 of file block_sparse_matrix_ez.h.
|
private |
Object storing and managing the transformation of column indices to indices of the sub-objects.
Definition at line 258 of file block_sparse_matrix_ez.h.
|
private |
The actual matrices
Definition at line 263 of file block_sparse_matrix_ez.h.
|
mutableprivateinherited |
Store the number of objects which subscribed to this object. Initially, this number is zero, and upon destruction it shall be zero again (i.e. all objects which subscribed should have unsubscribed again).
The creator (and owner) of an object is counted in the map below if HE manages to supply identification.
We use the mutable
keyword in order to allow subscription to constant objects also.
This counter may be read from and written to concurrently in multithreaded code: hence we use the std::atomic
class template.
Definition at line 218 of file subscriptor.h.
|
mutableprivateinherited |
In this map, we count subscriptions for each different identification string supplied to subscribe().
Definition at line 224 of file subscriptor.h.
|
mutableprivateinherited |
In this vector, we store pointers to the validity bool in the SmartPointer objects that subscribe to this class.
Definition at line 240 of file subscriptor.h.
|
mutableprivateinherited |
Pointer to the typeinfo object of this object, from which we can later deduce the class name. Since this information on the derived class is neither available in the destructor, nor in the constructor, we obtain it in between and store it here.
Definition at line 248 of file subscriptor.h.
|
staticprivateinherited |
A mutex used to ensure data consistency when accessing the mutable
members of this class. This lock is used in the subscribe() and unsubscribe() functions, as well as in list_subscribers()
.
Definition at line 271 of file subscriptor.h.