#include <deal.II/multigrid/mg_matrix.h>

Inheritance diagram for mg::Matrix< VectorType >:

Public Member Functions
	Matrix ()=default

template<typename MatrixType >
	Matrix (const MGLevelObject< MatrixType > &M)

template<typename MatrixType >
void	initialize (const MGLevelObject< MatrixType > &M)

void	reset ()

const LinearOperator< VectorType > &	operator[] (unsigned int level) const

virtual void	vmult (const unsigned int level, VectorType &dst, const VectorType &src) const override

virtual void	vmult_add (const unsigned int level, VectorType &dst, const VectorType &src) const override

virtual void	Tvmult (const unsigned int level, VectorType &dst, const VectorType &src) const override

virtual void	Tvmult_add (const unsigned int level, VectorType &dst, const VectorType &src) const override

virtual unsigned int	get_minlevel () const override

virtual unsigned int	get_maxlevel () const override

std::size_t	memory_consumption () const

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
MGLevelObject< LinearOperator< VectorType > >	matrices

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

Detailed Description

template<typename VectorType = Vector<double>>
class mg::Matrix< VectorType >

Multilevel matrix. This matrix stores an MGLevelObject of LinearOperator objects. It implements the interface defined in MGMatrixBase, so that it can be used as a matrix in Multigrid.

Definition at line 46 of file mg_matrix.h.

Member Typedef Documentation

◆ map_value_type

using Subscriptor::map_value_type = decltype(counter_map)::value_type

privateinherited

The data type used in counter_map.

Definition at line 230 of file subscriptor.h.

◆ map_iterator

using Subscriptor::map_iterator = decltype(counter_map)::iterator

privateinherited

The iterator type used in counter_map.

Definition at line 235 of file subscriptor.h.

Constructor & Destructor Documentation

◆ Matrix() [1/2]

template<typename VectorType = Vector<double>>

mg::Matrix< VectorType >::Matrix ( )

default

Default constructor for an empty object.

◆ Matrix() [2/2]

template<typename VectorType >

template<typename MatrixType >

mg::Matrix< VectorType >::Matrix ( const MGLevelObject< MatrixType > & M )

inline

Constructor setting up pointers to the matrices in M by calling initialize().

Definition at line 233 of file mg_matrix.h.

Member Function Documentation

◆ initialize()

template<typename VectorType >

template<typename MatrixType >

void mg::Matrix< VectorType >::initialize ( const MGLevelObject< MatrixType > & M )

inline

Initialize the object such that the level multiplication uses the matrices in M

Definition at line 205 of file mg_matrix.h.

◆ reset()

template<typename VectorType >

void mg::Matrix< VectorType >::reset

inline

Reset the object.

Definition at line 224 of file mg_matrix.h.

◆ operator[]()

template<typename VectorType >

const LinearOperator< VectorType > & mg::Matrix< VectorType >::operator[] ( unsigned int level ) const

inline

Access matrix on a level.

Definition at line 242 of file mg_matrix.h.

◆ vmult()

template<typename VectorType >

void mg::Matrix< VectorType >::vmult	(	const unsigned int	level,
		VectorType &	dst,
		const VectorType &	src
	)		const

overridevirtual

Matrix-vector-multiplication on a certain level.

Implements MGMatrixBase< VectorType >.

Definition at line 251 of file mg_matrix.h.

◆ vmult_add()

template<typename VectorType >

void mg::Matrix< VectorType >::vmult_add	(	const unsigned int	level,
		VectorType &	dst,
		const VectorType &	src
	)		const

overridevirtual

Adding matrix-vector-multiplication on a certain level.

Implements MGMatrixBase< VectorType >.

Definition at line 262 of file mg_matrix.h.

◆ Tvmult()

template<typename VectorType >

void mg::Matrix< VectorType >::Tvmult	(	const unsigned int	level,
		VectorType &	dst,
		const VectorType &	src
	)		const

overridevirtual

Transpose matrix-vector-multiplication on a certain level.

Implements MGMatrixBase< VectorType >.

Definition at line 273 of file mg_matrix.h.

◆ Tvmult_add()

template<typename VectorType >

void mg::Matrix< VectorType >::Tvmult_add	(	const unsigned int	level,
		VectorType &	dst,
		const VectorType &	src
	)		const

overridevirtual

Adding transpose matrix-vector-multiplication on a certain level.

Implements MGMatrixBase< VectorType >.

Definition at line 284 of file mg_matrix.h.

◆ get_minlevel()

template<typename VectorType >

unsigned int mg::Matrix< VectorType >::get_minlevel ( ) const

overridevirtual

Return the minimal level for which matrices are stored.

Implements MGMatrixBase< VectorType >.

Definition at line 295 of file mg_matrix.h.

◆ get_maxlevel()

template<typename VectorType >

unsigned int mg::Matrix< VectorType >::get_maxlevel ( ) const

overridevirtual

Return the minimal level for which matrices are stored.

Implements MGMatrixBase< VectorType >.

Definition at line 304 of file mg_matrix.h.

◆ memory_consumption()

template<typename VectorType >

std::size_t mg::Matrix< VectorType >::memory_consumption

inline

Memory used by this object.

Definition at line 313 of file mg_matrix.h.

◆ subscribe()

void Subscriptor::subscribe	(	std::atomic< bool > *const	validity,
		const std::string &	identifier = `""`
	)		const

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 136 of file subscriptor.cc.

◆ unsubscribe()

void Subscriptor::unsubscribe	(	std::atomic< bool > *const	validity,
		const std::string &	identifier = `""`
	)		const

inherited

Unsubscribes a user from the object.

Note: The identifier and the validity pointer must be the same as the one supplied to subscribe().

Definition at line 156 of file subscriptor.cc.

◆ n_subscriptions()

unsigned int Subscriptor::n_subscriptions ( ) const

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.

◆ list_subscribers() [1/2]

template<typename StreamType >

void Subscriptor::list_subscribers ( StreamType & stream ) const

inlineinherited

List the subscribers to the input stream.

Definition at line 317 of file subscriptor.h.

◆ list_subscribers() [2/2]

void Subscriptor::list_subscribers ( ) const

inherited

List the subscribers to deallog.

Definition at line 204 of file subscriptor.cc.

◆ serialize()

template<class Archive >

void Subscriptor::serialize	(	Archive &	ar,
		const unsigned int	version
	)

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.

◆ check_no_subscribers()

void Subscriptor::check_no_subscribers ( ) const

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.

Note: Since this function is just a consistency check it does nothing in release mode.; If this function is called when there is an uncaught exception then, rather than aborting, this function prints an error message to the standard error stream and returns.

Definition at line 53 of file subscriptor.cc.

Member Data Documentation

◆ matrices

template<typename VectorType = Vector<double>>

MGLevelObject<LinearOperator<VectorType> > mg::Matrix< VectorType >::matrices

private

Definition at line 109 of file mg_matrix.h.

◆ counter

std::atomic<unsigned int> Subscriptor::counter

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 219 of file subscriptor.h.

◆ counter_map

std::map<std::string, unsigned int> Subscriptor::counter_map

mutableprivateinherited

In this map, we count subscriptions for each different identification string supplied to subscribe().

Definition at line 225 of file subscriptor.h.

◆ validity_pointers

std::vector<std::atomic<bool> *> Subscriptor::validity_pointers

mutableprivateinherited

In this vector, we store pointers to the validity bool in the SmartPointer objects that subscribe to this class.

Definition at line 241 of file subscriptor.h.

◆ object_info

const std::type_info* Subscriptor::object_info

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 249 of file subscriptor.h.

◆ mutex

std::mutex Subscriptor::mutex

staticprivateinherited

A mutex used to ensure data consistency when printing out the list of subscribers.

Definition at line 271 of file subscriptor.h.

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

include/deal.II/multigrid/mg_matrix.h

Public Member Functions

Static Public Member Functions

Private Types

Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Member Typedef Documentation

◆ map_value_type

◆ map_iterator

Constructor & Destructor Documentation

◆ Matrix() [1/2]

◆ Matrix() [2/2]

Member Function Documentation

◆ initialize()

◆ reset()

◆ operator[]()

◆ vmult()

◆ vmult_add()

◆ Tvmult()

◆ Tvmult_add()

◆ get_minlevel()

◆ get_maxlevel()

◆ memory_consumption()

◆ subscribe()

◆ unsubscribe()

◆ n_subscriptions()

◆ list_subscribers() [1/2]

◆ list_subscribers() [2/2]

◆ serialize()

◆ check_no_subscribers()

Member Data Documentation

◆ matrices

◆ counter

◆ counter_map

◆ validity_pointers

◆ object_info

◆ mutex