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

Inheritance diagram for MGTransferBlockMatrixFreeBase< dim, Number, TransferType >:

[legend]

Public Member Functions
	MGTransferBlockMatrixFreeBase (const bool same_for_all)

virtual void	prolongate (const unsigned int to_level, LinearAlgebra::distributed::BlockVector< Number > &dst, const LinearAlgebra::distributed::BlockVector< Number > &src) const override

virtual void	prolongate_and_add (const unsigned int to_level, LinearAlgebra::distributed::BlockVector< Number > &dst, const LinearAlgebra::distributed::BlockVector< Number > &src) const override

virtual void	restrict_and_add (const unsigned int from_level, LinearAlgebra::distributed::BlockVector< Number > &dst, const LinearAlgebra::distributed::BlockVector< Number > &src) const override

template<typename BlockVectorType2 >
void	copy_to_mg (const DoFHandler< dim > &dof_handler, MGLevelObject< LinearAlgebra::distributed::BlockVector< Number > > &dst, const BlockVectorType2 &src) const

template<typename BlockVectorType2 >
void	copy_to_mg (const std::vector< const DoFHandler< dim > * > &dof_handler, MGLevelObject< LinearAlgebra::distributed::BlockVector< Number > > &dst, const BlockVectorType2 &src) const

template<typename BlockVectorType2 >
void	copy_from_mg (const DoFHandler< dim > &dof_handler, BlockVectorType2 &dst, const MGLevelObject< LinearAlgebra::distributed::BlockVector< Number > > &src) const

template<typename BlockVectorType2 >
void	copy_from_mg (const std::vector< const DoFHandler< dim > * > &dof_handler, BlockVectorType2 &dst, const MGLevelObject< LinearAlgebra::distributed::BlockVector< Number > > &src) 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)

Static Public Attributes
static const bool	supports_dof_handler_vector = true

Protected Member Functions
virtual const TransferType &	get_matrix_free_transfer (const unsigned int b) const =0

Protected Attributes
const bool	same_for_all

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
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<int dim, typename Number, typename TransferType>
class MGTransferBlockMatrixFreeBase< dim, Number, TransferType >

Base class of MGTransferBlockMatrixFree. While MGTransferBlockMatrixFree contains all the setup routines of the transfer operators for the blocks, this class simply applies them, e.g., for restricting and prolongating.

Definition at line 316 of file mg_transfer_matrix_free.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

◆ MGTransferBlockMatrixFreeBase()

template<int dim, typename Number , typename TransferType >

MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::MGTransferBlockMatrixFreeBase ( const bool same_for_all )

inline

Definition at line 320 of file mg_transfer_matrix_free.h.

Member Function Documentation

◆ prolongate()

template<int dim, typename Number , typename TransferType >

virtual void MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::prolongate	(	const unsigned int	to_level,
		LinearAlgebra::distributed::BlockVector< Number > &	dst,
		const LinearAlgebra::distributed::BlockVector< Number > &	src
	)		const

overridevirtual

Prolongate a vector from level to_level-1 to level to_level using the embedding matrices of the underlying finite element. The previous content of dst is overwritten.

Parameters

to_level	The index of the level to prolongate to, which is the level of `dst`.
src	is a vector with as many elements as there are degrees of freedom on the coarser level involved.
dst	has as many elements as there are degrees of freedom on the finer level.

Implements MGTransferBase< LinearAlgebra::distributed::BlockVector< Number > >.

◆ prolongate_and_add()

template<int dim, typename Number , typename TransferType >

virtual void MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::prolongate_and_add	(	const unsigned int	to_level,
		LinearAlgebra::distributed::BlockVector< Number > &	dst,
		const LinearAlgebra::distributed::BlockVector< Number > &	src
	)		const

overridevirtual

Prolongate a vector from level to_level-1 to level to_level, summing into the previous content of dst.

src is a vector with as many elements as there are degrees of freedom on the coarser level involved.

dst has as many elements as there are degrees of freedom on the finer level.

Reimplemented from MGTransferBase< LinearAlgebra::distributed::BlockVector< Number > >.

◆ restrict_and_add()

template<int dim, typename Number , typename TransferType >

virtual void MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::restrict_and_add	(	const unsigned int	from_level,
		LinearAlgebra::distributed::BlockVector< Number > &	dst,
		const LinearAlgebra::distributed::BlockVector< Number > &	src
	)		const

overridevirtual

Restrict a vector from level from_level to level from_level-1 using the transpose operation of the prolongate() method. If the region covered by cells on level from_level is smaller than that of level from_level-1 (local refinement), then some degrees of freedom in dst are active and will not be altered. For the other degrees of freedom, the result of the restriction is added.

Parameters

from_level	The index of the level to restrict from, which is the level of `src`.
src	is a vector with as many elements as there are degrees of freedom on the finer level involved.
dst	has as many elements as there are degrees of freedom on the coarser level.

Implements MGTransferBase< LinearAlgebra::distributed::BlockVector< Number > >.

◆ copy_to_mg() [1/2]

template<int dim, typename Number , typename TransferType >

template<typename BlockVectorType2 >

void MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::copy_to_mg	(	const DoFHandler< dim > &	dof_handler,
		MGLevelObject< LinearAlgebra::distributed::BlockVector< Number > > &	dst,
		const BlockVectorType2 &	src
	)		const

Transfer from a block-vector on the global grid to block-vectors defined on each of the levels separately for active degrees of freedom. In particular, for a globally refined mesh only the finest level in dst is filled as a plain copy of src. All the other level objects are left untouched.

This function will initialize dst accordingly if needed as required by the Multigrid class.

◆ copy_to_mg() [2/2]

template<int dim, typename Number , typename TransferType >

template<typename BlockVectorType2 >

void MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::copy_to_mg	(	const std::vector< const DoFHandler< dim > * > &	dof_handler,
		MGLevelObject< LinearAlgebra::distributed::BlockVector< Number > > &	dst,
		const BlockVectorType2 &	src
	)		const

Same as above for the case that each block has its own DoFHandler.

◆ copy_from_mg() [1/2]

template<int dim, typename Number , typename TransferType >

template<typename BlockVectorType2 >

void MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::copy_from_mg	(	const DoFHandler< dim > &	dof_handler,
		BlockVectorType2 &	dst,
		const MGLevelObject< LinearAlgebra::distributed::BlockVector< Number > > &	src
	)		const

Transfer from multi-level block-vector to normal vector.

◆ copy_from_mg() [2/2]

template<int dim, typename Number , typename TransferType >

template<typename BlockVectorType2 >

void MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::copy_from_mg	(	const std::vector< const DoFHandler< dim > * > &	dof_handler,
		BlockVectorType2 &	dst,
		const MGLevelObject< LinearAlgebra::distributed::BlockVector< Number > > &	src
	)		const

Same as above for the case that each block has its own DoFHandler.

◆ get_matrix_free_transfer()

template<int dim, typename Number , typename TransferType >

virtual const TransferType & MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::get_matrix_free_transfer ( const unsigned int b ) const

protectedpure virtual

Return the right non-block transfer operator. Has to be implemented by the derived class.

Implemented in MGTransferBlockMF< dim, Number >, and MGTransferBlockMatrixFree< dim, Number >.

◆ 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

◆ supports_dof_handler_vector

template<int dim, typename Number , typename TransferType >

const bool MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::supports_dof_handler_vector = true

static

This class can both be used with a single DoFHandler or a separate DoFHandler for each block.

Definition at line 427 of file mg_transfer_matrix_free.h.

◆ same_for_all

template<int dim, typename Number , typename TransferType >

const bool MGTransferBlockMatrixFreeBase< dim, Number, TransferType >::same_for_all

protected

A flag to indicate whether the same DoFHandler is used for all the components or if each block has its own DoFHandler.

Definition at line 441 of file mg_transfer_matrix_free.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:

include/deal.II/multigrid/mg_transfer_matrix_free.h

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Private Types

Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Member Typedef Documentation

◆ map_value_type

◆ map_iterator

Constructor & Destructor Documentation

◆ MGTransferBlockMatrixFreeBase()

Member Function Documentation

◆ prolongate()

◆ prolongate_and_add()

◆ restrict_and_add()

◆ copy_to_mg() [1/2]

◆ copy_to_mg() [2/2]

◆ copy_from_mg() [1/2]

◆ copy_from_mg() [2/2]

◆ get_matrix_free_transfer()

◆ subscribe()

◆ unsubscribe()

◆ n_subscriptions()

◆ list_subscribers() [1/2]

◆ list_subscribers() [2/2]

◆ serialize()

◆ check_no_subscribers()

Member Data Documentation

◆ supports_dof_handler_vector

◆ same_for_all

◆ counter

◆ counter_map

◆ validity_pointers

◆ object_info

◆ mutex