deal.II version GIT relicensing-2287-g6548a49e0a 2024-12-20 18:30:00+00:00
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Public Member Functions | Static Public Member Functions | Private Types | Private Member Functions | Private Attributes | Static Private Attributes | List of all members
mg::Matrix< VectorType > Class Template Reference

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

Inheritance diagram for mg::Matrix< VectorType >:
Inheritance graph
[legend]

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)
 
EnableObserverPointer functionality

Classes derived from EnableObserverPointer provide a facility to subscribe to this object. This is mostly used by the ObserverPointer 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 45 of file mg_matrix.h.

Member Typedef Documentation

◆ map_value_type

using EnableObserverPointer::map_value_type = decltype(counter_map)::value_type
privateinherited

The data type used in counter_map.

Definition at line 238 of file enable_observer_pointer.h.

◆ map_iterator

using EnableObserverPointer::map_iterator = decltype(counter_map)::iterator
privateinherited

The iterator type used in counter_map.

Definition at line 243 of file enable_observer_pointer.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 232 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 204 of file mg_matrix.h.

◆ reset()

template<typename VectorType >
void mg::Matrix< VectorType >::reset ( )
inline

Reset the object.

Definition at line 223 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 241 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 250 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 261 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 272 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 283 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 294 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 303 of file mg_matrix.h.

◆ memory_consumption()

template<typename VectorType >
std::size_t mg::Matrix< VectorType >::memory_consumption ( ) const
inline

Memory used by this object.

Definition at line 312 of file mg_matrix.h.

◆ subscribe()

void EnableObserverPointer::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 131 of file enable_observer_pointer.cc.

◆ unsubscribe()

void EnableObserverPointer::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 151 of file enable_observer_pointer.cc.

◆ n_subscriptions()

unsigned int EnableObserverPointer::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 322 of file enable_observer_pointer.h.

◆ list_subscribers() [1/2]

template<typename StreamType >
void EnableObserverPointer::list_subscribers ( StreamType &  stream) const
inlineinherited

List the subscribers to the input stream.

Definition at line 339 of file enable_observer_pointer.h.

◆ list_subscribers() [2/2]

void EnableObserverPointer::list_subscribers ( ) const
inherited

List the subscribers to deallog.

Definition at line 199 of file enable_observer_pointer.cc.

◆ serialize()

template<class Archive >
void EnableObserverPointer::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 331 of file enable_observer_pointer.h.

◆ check_no_subscribers()

void EnableObserverPointer::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 enable_observer_pointer.cc.

Member Data Documentation

◆ matrices

template<typename VectorType = Vector<double>>
MGLevelObject<LinearOperator<VectorType> > mg::Matrix< VectorType >::matrices
private

Definition at line 108 of file mg_matrix.h.

◆ counter

std::atomic<unsigned int> EnableObserverPointer::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 227 of file enable_observer_pointer.h.

◆ counter_map

std::map<std::string, unsigned int> EnableObserverPointer::counter_map
mutableprivateinherited

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

Definition at line 233 of file enable_observer_pointer.h.

◆ validity_pointers

std::vector<std::atomic<bool> *> EnableObserverPointer::validity_pointers
mutableprivateinherited

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

Definition at line 249 of file enable_observer_pointer.h.

◆ object_info

const std::type_info* EnableObserverPointer::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 257 of file enable_observer_pointer.h.

◆ mutex

std::mutex EnableObserverPointer::mutex
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 280 of file enable_observer_pointer.h.

The documentation for this class was generated from the following file:
Generated by doxygen 1.9.8