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Classes | Public Types | Public Member Functions | Static Public Member Functions | Public Attributes | Protected Member Functions | Protected Attributes | Private Attributes | Static Private Attributes | Friends | List of all members
MGTwoLevelTransfer< dim, VectorType > Class Template Reference
Multilevel support

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

Detailed Description

template<int dim, typename VectorType>
class MGTwoLevelTransfer< dim, VectorType >

Class for transfer between two multigrid levels for geometric or polynomial coarsening strategies. It relies on a list of DoF indices associated with the cells on the coarse and fine side of the transfer, and implements a cell-by-cell (matrix-free) interpolation setup with the reference-cell embedding matrices.

The implementation of this class is explained in detail in [181].

There are two possible ways to use this class. In the first option, the transfer is built from the underlying DoFHandler and AffineConstraints objects on the coarse and fine side, collecting an explicit copy of all indices on both sides. This works for a relatively wide set of FiniteElement combinations, including p-adaptive schemes using hp::FECollection. The second, more setup-efficient approach is to build the transfer between two multigrid levels for polynomial coarsening (p-coarsening) from two MatrixFree objects that might already exist from other parts of the code. In this case, we require that both objects share the same triangulation (but differ through their DoFHandler descriptions) and are described by the respective DoFHandler/AffineConstraints pair used for constructing the MatrixFree object. This second variant is more efficient because no queries to the DoFHandler need to be made, reducing both the setup time and the overall memory consumption. Note that not all options are supported for the second entry point, and we fall back to the first option in such a case.

Definition at line 370 of file mg_transfer_matrix_free.h.

Inheritance diagram for MGTwoLevelTransfer< dim, VectorType >:
[legend]

Classes

struct  MatrixFreeRelatedData
 
struct  MGTransferScheme
 

Public Types

using Number = typename VectorType::value_type
 
using VectorizedArrayType = VectorizedArray< Number >
 

Public Member Functions

void reinit_geometric_transfer (const DoFHandler< dim > &dof_handler_fine, const DoFHandler< dim > &dof_handler_coarse, const AffineConstraints< Number > &constraint_fine=AffineConstraints< Number >(), const AffineConstraints< Number > &constraint_coarse=AffineConstraints< Number >(), const unsigned int mg_level_fine=numbers::invalid_unsigned_int, const unsigned int mg_level_coarse=numbers::invalid_unsigned_int)
 
void reinit_polynomial_transfer (const DoFHandler< dim > &dof_handler_fine, const DoFHandler< dim > &dof_handler_coarse, const AffineConstraints< Number > &constraint_fine=AffineConstraints< Number >(), const AffineConstraints< Number > &constraint_coarse=AffineConstraints< Number >(), const unsigned int mg_level_fine=numbers::invalid_unsigned_int, const unsigned int mg_level_coarse=numbers::invalid_unsigned_int)
 
void reinit (const DoFHandler< dim > &dof_handler_fine, const DoFHandler< dim > &dof_handler_coarse, const AffineConstraints< Number > &constraint_fine=AffineConstraints< Number >(), const AffineConstraints< Number > &constraint_coarse=AffineConstraints< Number >(), const unsigned int mg_level_fine=numbers::invalid_unsigned_int, const unsigned int mg_level_coarse=numbers::invalid_unsigned_int)
 
void reinit (const MatrixFree< dim, Number > &matrix_free_fine, const unsigned int dof_handler_index_fine, const MatrixFree< dim, Number > &matrix_free_coarse, const unsigned int dof_handler_index_coarse)
 
void interpolate (VectorType &dst, const VectorType &src) const override
 
std::pair< bool, bool > enable_inplace_operations_if_possible (const std::shared_ptr< const Utilities::MPI::Partitioner > &partitioner_coarse, const std::shared_ptr< const Utilities::MPI::Partitioner > &partitioner_fine) override
 
std::size_t memory_consumption () const override
 
std::pair< const DoFHandler< dim > *, unsigned int > get_dof_handler_fine () const override
 
void prolongate_and_add (VectorType &dst, const VectorType &src) const override
 
void restrict_and_add (VectorType &dst, const VectorType &src) const override
 
template<class Archive >
void serialize (Archive &ar, const unsigned int version)
 
Querying the observer pointers an object has.
unsigned int n_subscriptions () const
 
template<typename StreamType >
void list_subscribers (StreamType &stream) const
 
void list_subscribers () const
 

Static Public Member Functions

static bool fast_polynomial_transfer_supported (const unsigned int fe_degree_fine, const unsigned int fe_degree_coarse)
 
static ::ExceptionBase & ExcInUse (int arg1, std::string arg2, std::string arg3)
 
static ::ExceptionBase & ExcNoSubscriber (std::string arg1, std::string arg2)
 

Public Attributes

std::shared_ptr< const Utilities::MPI::Partitioner > partitioner_coarse
 
std::shared_ptr< const Utilities::MPI::Partitioner > partitioner_fine
 

Protected Member Functions

void prolongate_and_add_internal (VectorType &dst, const VectorType &src) const override
 
void restrict_and_add_internal (VectorType &dst, const VectorType &src) const override
 
void update_ghost_values (const VectorType &vec) const
 
void compress (VectorType &vec, const VectorOperation::values op) const
 
void zero_out_ghost_values (const VectorType &vec) const
 
template<std::size_t width, typename IndexType >
std::pair< bool, bool > internal_enable_inplace_operations_if_possible (const std::shared_ptr< const Utilities::MPI::Partitioner > &partitioner_coarse, const std::shared_ptr< const Utilities::MPI::Partitioner > &partitioner_fine, bool &vec_fine_needs_ghost_update, internal::MatrixFreeFunctions::ConstraintInfo< dim, VectorizedArray< Number, width >, IndexType > &constraint_info_coarse, std::vector< unsigned int > &dof_indices_fine)
 

Protected Attributes

bool fine_element_is_continuous
 
VectorType vec_coarse
 
VectorType vec_fine
 
bool vec_fine_needs_ghost_update
 
std::shared_ptr< const Utilities::MPI::Partitioner > partitioner_coarse_embedded
 
std::shared_ptr< const Utilities::MPI::Partitioner > partitioner_fine_embedded
 
AlignedVector< Number > buffer_coarse_embedded
 
AlignedVector< Number > buffer_fine_embedded
 

Private Member Functions

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
 
void check_no_subscribers () const noexcept
 

Private Attributes

std::vector< MGTransferScheme > schemes
 
internal::MatrixFreeFunctions::ConstraintInfo< dim, VectorizedArrayType, types::global_dof_index > constraint_info_coarse
 
internal::MatrixFreeFunctions::ConstraintInfo< dim, VectorizedArrayType, types::global_dof_index > constraint_info_fine
 
std::unique_ptr< MatrixFreeRelatedData > matrix_free_data
 
std::vector< unsigned int > weights_start
 
AlignedVector< VectorizedArrayType > weights
 
std::vector< unsigned char > weights_are_compressed
 
unsigned int n_components
 
ObserverPointer< const DoFHandler< dim > > dof_handler_fine
 
unsigned int mg_level_fine
 
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
 

Friends

class internal::MGTwoLevelTransferImplementation
 
class MGTransferMatrixFree< dim, Number, MemorySpace::Host >
 
class MGTransferMatrixFree< dim, Number, MemorySpace::Default >
 
class Portable::MGTwoLevelTransfer< dim, LinearAlgebra::distributed::Vector< Number, MemorySpace::Default > >
 
class Portable::internal::MGTwoLevelTransferImplementation
 

Member Typedef Documentation

◆ Number

template<int dim, typename VectorType >
using MGTwoLevelTransfer< dim, VectorType >::Number = typename VectorType::value_type

The scalar type used by the vector-type template argument.

Definition at line 389 of file mg_transfer_matrix_free.h.

◆ VectorizedArrayType

template<int dim, typename VectorType >
using MGTwoLevelTransfer< dim, VectorType >::VectorizedArrayType = VectorizedArray<Number>

A data type representing a vectorized array of the same kind of objects stored in the VectorType.

Definition at line 395 of file mg_transfer_matrix_free.h.

Member Function Documentation

◆ reinit_geometric_transfer()

template<int dim, typename VectorType >
void MGTwoLevelTransfer< dim, VectorType >::reinit_geometric_transfer ( const DoFHandler< dim > &  dof_handler_fine,
const DoFHandler< dim > &  dof_handler_coarse,
const AffineConstraints< Number > &  constraint_fine = AffineConstraints< Number >(),
const AffineConstraints< Number > &  constraint_coarse = AffineConstraints< Number >(),
const unsigned int  mg_level_fine = numbers::invalid_unsigned_int,
const unsigned int  mg_level_coarse = numbers::invalid_unsigned_int 
)

Set up global coarsening between the given DoFHandler objects ( dof_handler_fine and dof_handler_coarse). In case the optional arguments mg_level_fine and mg_level_coarse are set, a local-smoothing multigrid approach is possible, otherwise a global-coarsening approach connecting two different triangulations on active cells is selected.

◆ reinit_polynomial_transfer()

template<int dim, typename VectorType >
void MGTwoLevelTransfer< dim, VectorType >::reinit_polynomial_transfer ( const DoFHandler< dim > &  dof_handler_fine,
const DoFHandler< dim > &  dof_handler_coarse,
const AffineConstraints< Number > &  constraint_fine = AffineConstraints< Number >(),
const AffineConstraints< Number > &  constraint_coarse = AffineConstraints< Number >(),
const unsigned int  mg_level_fine = numbers::invalid_unsigned_int,
const unsigned int  mg_level_coarse = numbers::invalid_unsigned_int 
)

Set up polynomial coarsening between the given DoFHandler objects ( dof_handler_fine and dof_handler_coarse). Polynomial transfers can be only performed on active levels (numbers::invalid_unsigned_int) or on coarse-grid levels, i.e., levels without hanging nodes.

Note
The function polynomial_transfer_supported() can be used to check if the given polynomial coarsening strategy is supported.

◆ reinit() [1/2]

template<int dim, typename VectorType >
void MGTwoLevelTransfer< dim, VectorType >::reinit ( const DoFHandler< dim > &  dof_handler_fine,
const DoFHandler< dim > &  dof_handler_coarse,
const AffineConstraints< Number > &  constraint_fine = AffineConstraints< Number >(),
const AffineConstraints< Number > &  constraint_coarse = AffineConstraints< Number >(),
const unsigned int  mg_level_fine = numbers::invalid_unsigned_int,
const unsigned int  mg_level_coarse = numbers::invalid_unsigned_int 
)

Set up the transfer operator between the given DoFHandler objects ( dof_handler_fine and dof_handler_coarse). Depending on the underlying Triangulation objects, either a polynomial or geometric global coarsening algorithm is selected.

Note
While geometric transfer can be only performed on active levels (numbers::invalid_unsigned_int), polynomial transfers can also be performed on coarse-grid levels, i.e., levels without hanging nodes.
The function polynomial_transfer_supported() can be used to check if the given polynomial coarsening strategy is supported.

◆ reinit() [2/2]

template<int dim, typename VectorType >
void MGTwoLevelTransfer< dim, VectorType >::reinit ( const MatrixFree< dim, Number > &  matrix_free_fine,
const unsigned int  dof_handler_index_fine,
const MatrixFree< dim, Number > &  matrix_free_coarse,
const unsigned int  dof_handler_index_coarse 
)

Set up polynomial coarsening between the DoFHandler objects underlying two MatrixFree objects and the respective numbers for the DoFHandler objects within MatrixFree. This reinit() function allows for a more efficient setup of the transfer operator and reduces the overall memory consumption of a multigrid cycle in case the same MatrixFree objects are also used for smoothers and residual evaluation on the two involved levels.

◆ fast_polynomial_transfer_supported()

template<int dim, typename VectorType >
static bool MGTwoLevelTransfer< dim, VectorType >::fast_polynomial_transfer_supported ( const unsigned int  fe_degree_fine,
const unsigned int  fe_degree_coarse 
)
static

Check if a fast templated version of the polynomial transfer between fe_degree_fine and fe_degree_coarse is available.

Note
Currently, the polynomial coarsening strategies: 1) go-to-one, 2) bisect, and 3) decrease-by-one are precompiled with templates for degrees up to 9.

◆ interpolate()

template<int dim, typename VectorType >
void MGTwoLevelTransfer< dim, VectorType >::interpolate ( VectorType &  dst,
const VectorType &  src 
) const
overridevirtual

Perform interpolation of a solution vector from the fine level to the coarse level. This function is different from restriction, where a weighted residual is transferred to a coarser level (transposition of prolongation matrix). In other words, restriction acts on right hand side vectors, whereas interpolation acts on solution vectors.

Implements MGTwoLevelTransferBase< dim, VectorType >.

◆ enable_inplace_operations_if_possible()

template<int dim, typename VectorType >
std::pair< bool, bool > MGTwoLevelTransfer< dim, VectorType >::enable_inplace_operations_if_possible ( const std::shared_ptr< const Utilities::MPI::Partitioner > &  partitioner_coarse,
const std::shared_ptr< const Utilities::MPI::Partitioner > &  partitioner_fine 
)
overridevirtual

Enable inplace vector operations if external and internal vectors are compatible.

Implements MGTwoLevelTransferBase< dim, VectorType >.

◆ memory_consumption()

template<int dim, typename VectorType >
std::size_t MGTwoLevelTransfer< dim, VectorType >::memory_consumption ( ) const
overridevirtual

Return the memory consumption of the allocated memory in this class.

Implements MGTwoLevelTransferBase< dim, VectorType >.

◆ get_dof_handler_fine()

template<int dim, typename VectorType >
std::pair< const DoFHandler< dim > *, unsigned int > MGTwoLevelTransfer< dim, VectorType >::get_dof_handler_fine ( ) const
overridevirtual

Return the DoFHandler associated with the fine level and the level index.

Implements MGTwoLevelTransferBase< dim, VectorType >.

◆ prolongate_and_add_internal()

template<int dim, typename VectorType >
void MGTwoLevelTransfer< dim, VectorType >::prolongate_and_add_internal ( VectorType &  dst,
const VectorType &  src 
) const
overrideprotectedvirtual

Perform prolongation on vectors with correct ghosting.

Implements internal::MGTwoLevelTransferCore< dim, VectorType >.

◆ restrict_and_add_internal()

template<int dim, typename VectorType >
void MGTwoLevelTransfer< dim, VectorType >::restrict_and_add_internal ( VectorType &  dst,
const VectorType &  src 
) const
overrideprotectedvirtual

Perform restriction on vectors with correct ghosting.

Implements internal::MGTwoLevelTransferCore< dim, VectorType >.

◆ prolongate_and_add()

template<int dim, typename VectorType >
void internal::MGTwoLevelTransferCore< dim, VectorType >::prolongate_and_add ( VectorType &  dst,
const VectorType &  src 
) const
overridevirtualinherited

Perform prolongation on a solution vector.

Implements MGTwoLevelTransferBase< dim, VectorType >.

◆ restrict_and_add()

template<int dim, typename VectorType >
void internal::MGTwoLevelTransferCore< dim, VectorType >::restrict_and_add ( VectorType &  dst,
const VectorType &  src 
) const
overridevirtualinherited

Perform restriction on a residual vector.

Implements MGTwoLevelTransferBase< dim, VectorType >.

◆ update_ghost_values()

template<int dim, typename VectorType >
void internal::MGTwoLevelTransferCore< dim, VectorType >::update_ghost_values ( const VectorType &  vec) const
protectedinherited

A wrapper around update_ghost_values() optimized in case the present vector has the same parallel layout of one of the external partitioners.

◆ compress()

template<int dim, typename VectorType >
void internal::MGTwoLevelTransferCore< dim, VectorType >::compress ( VectorType &  vec,
const VectorOperation::values  op 
) const
protectedinherited

A wrapper around compress() optimized in case the present vector has the same parallel layout of one of the external partitioners.

◆ zero_out_ghost_values()

template<int dim, typename VectorType >
void internal::MGTwoLevelTransferCore< dim, VectorType >::zero_out_ghost_values ( const VectorType &  vec) const
protectedinherited

A wrapper around zero_out_ghost_values() optimized in case the present vector has the same parallel layout of one of the external partitioners.

◆ internal_enable_inplace_operations_if_possible()

template<int dim, typename VectorType >
template<std::size_t width, typename IndexType >
std::pair< bool, bool > internal::MGTwoLevelTransferCore< dim, VectorType >::internal_enable_inplace_operations_if_possible ( const std::shared_ptr< const Utilities::MPI::Partitioner > &  partitioner_coarse,
const std::shared_ptr< const Utilities::MPI::Partitioner > &  partitioner_fine,
bool &  vec_fine_needs_ghost_update,
internal::MatrixFreeFunctions::ConstraintInfo< dim, VectorizedArray< Number, width >, IndexType > &  constraint_info_coarse,
std::vector< unsigned int > &  dof_indices_fine 
)
protectedinherited

Enable inplace vector operations if external and internal vectors are compatible.

◆ 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 318 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 335 of file enable_observer_pointer.h.

◆ list_subscribers() [2/2]

void EnableObserverPointer::list_subscribers ( ) const
inherited

List the subscribers to deallog.

Definition at line 200 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 327 of file enable_observer_pointer.h.

◆ subscribe()

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

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 enable_observer_pointer.cc.

◆ unsubscribe()

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

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 154 of file enable_observer_pointer.cc.

◆ 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 58 of file enable_observer_pointer.cc.

Friends And Related Symbol Documentation

◆ internal::MGTwoLevelTransferImplementation

template<int dim, typename VectorType >
friend class internal::MGTwoLevelTransferImplementation
friend

Definition at line 678 of file mg_transfer_matrix_free.h.

◆ MGTransferMatrixFree< dim, Number, MemorySpace::Host >

template<int dim, typename VectorType >
friend class MGTransferMatrixFree< dim, Number, MemorySpace::Host >
friend

Definition at line 678 of file mg_transfer_matrix_free.h.

◆ MGTransferMatrixFree< dim, Number, MemorySpace::Default >

template<int dim, typename VectorType >
friend class MGTransferMatrixFree< dim, Number, MemorySpace::Default >
friend

Definition at line 678 of file mg_transfer_matrix_free.h.

◆ Portable::MGTwoLevelTransfer< dim, LinearAlgebra::distributed::Vector< Number, MemorySpace::Default > >

template<int dim, typename VectorType >
friend class Portable::MGTwoLevelTransfer< dim, LinearAlgebra::distributed::Vector< Number, MemorySpace::Default > >
friend

Definition at line 678 of file mg_transfer_matrix_free.h.

◆ Portable::internal::MGTwoLevelTransferImplementation

template<int dim, typename VectorType >
friend class Portable::internal::MGTwoLevelTransferImplementation
friend

Definition at line 688 of file mg_transfer_matrix_free.h.

Member Data Documentation

◆ schemes

template<int dim, typename VectorType >
std::vector<MGTransferScheme> MGTwoLevelTransfer< dim, VectorType >::schemes
private

Transfer schemes.

Definition at line 588 of file mg_transfer_matrix_free.h.

◆ constraint_info_coarse

template<int dim, typename VectorType >
internal::MatrixFreeFunctions:: ConstraintInfo<dim, VectorizedArrayType, types::global_dof_index> MGTwoLevelTransfer< dim, VectorType >::constraint_info_coarse
private

Helper class for reading from and writing to global coarse vectors and for applying constraints.

Definition at line 596 of file mg_transfer_matrix_free.h.

◆ constraint_info_fine

template<int dim, typename VectorType >
internal::MatrixFreeFunctions:: ConstraintInfo<dim, VectorizedArrayType, types::global_dof_index> MGTwoLevelTransfer< dim, VectorType >::constraint_info_fine
private

Helper class for reading from and writing to global fine vectors.

Definition at line 603 of file mg_transfer_matrix_free.h.

◆ matrix_free_data

template<int dim, typename VectorType >
std::unique_ptr<MatrixFreeRelatedData> MGTwoLevelTransfer< dim, VectorType >::matrix_free_data
private

In case this class is built with MatrixFree objects (see the respective reinit() function), we set up this data structure and skip the other fields of the class.

Definition at line 643 of file mg_transfer_matrix_free.h.

◆ weights_start

template<int dim, typename VectorType >
std::vector<unsigned int> MGTwoLevelTransfer< dim, VectorType >::weights_start
private

CRS-like pointer to the start into the weights array, as that array can be compressed or in full format.

Definition at line 649 of file mg_transfer_matrix_free.h.

◆ weights

template<int dim, typename VectorType >
AlignedVector<VectorizedArrayType> MGTwoLevelTransfer< dim, VectorType >::weights
private

Weights for continuous elements, either in full format or compressed into 3^dim doubles per cell if possible.

Definition at line 655 of file mg_transfer_matrix_free.h.

◆ weights_are_compressed

template<int dim, typename VectorType >
std::vector<unsigned char> MGTwoLevelTransfer< dim, VectorType >::weights_are_compressed
private

Store whether the weights are in compressed format or not, in the ordering of the weights_start array.

Definition at line 661 of file mg_transfer_matrix_free.h.

◆ n_components

template<int dim, typename VectorType >
unsigned int MGTwoLevelTransfer< dim, VectorType >::n_components
private

Number of components.

Definition at line 666 of file mg_transfer_matrix_free.h.

◆ dof_handler_fine

template<int dim, typename VectorType >
ObserverPointer<const DoFHandler<dim> > MGTwoLevelTransfer< dim, VectorType >::dof_handler_fine
private

Pointer to the DoFHandler object used during initialization.

Definition at line 671 of file mg_transfer_matrix_free.h.

◆ mg_level_fine

template<int dim, typename VectorType >
unsigned int MGTwoLevelTransfer< dim, VectorType >::mg_level_fine
private

Multigrid level used during initialization.

Definition at line 676 of file mg_transfer_matrix_free.h.

◆ fine_element_is_continuous

template<int dim, typename VectorType >
bool internal::MGTwoLevelTransferCore< dim, VectorType >::fine_element_is_continuous
protectedinherited

Flag if the finite elements on the fine cells are continuous. If yes, the multiplicity of DoF sharing a vertex/line as well as constraints have to be taken into account via weights.

Definition at line 290 of file mg_transfer_matrix_free.h.

◆ vec_coarse

template<int dim, typename VectorType >
VectorType internal::MGTwoLevelTransferCore< dim, VectorType >::vec_coarse
mutableprotectedinherited

Internal vector on which the actual prolongation/restriction is performed.

Definition at line 297 of file mg_transfer_matrix_free.h.

◆ vec_fine

template<int dim, typename VectorType >
VectorType internal::MGTwoLevelTransferCore< dim, VectorType >::vec_fine
mutableprotectedinherited

Internal vector needed for collecting all degrees of freedom of the fine cells. It is only initialized if the fine-level DoF indices touch DoFs other than the locally active ones (which we always assume can be accessed by the given vectors in the prolongate/restrict functions), otherwise it is left at size zero.

Definition at line 306 of file mg_transfer_matrix_free.h.

◆ vec_fine_needs_ghost_update

template<int dim, typename VectorType >
bool internal::MGTwoLevelTransferCore< dim, VectorType >::vec_fine_needs_ghost_update
protectedinherited

Bool indicating whether fine vector has relevant ghost values.

Definition at line 311 of file mg_transfer_matrix_free.h.

◆ partitioner_coarse_embedded

template<int dim, typename VectorType >
std::shared_ptr<const Utilities::MPI::Partitioner> internal::MGTwoLevelTransferCore< dim, VectorType >::partitioner_coarse_embedded
protectedinherited

Embedded partitioner for efficient communication if locally relevant DoFs are a subset of an external Partitioner object.

Definition at line 318 of file mg_transfer_matrix_free.h.

◆ partitioner_fine_embedded

template<int dim, typename VectorType >
std::shared_ptr<const Utilities::MPI::Partitioner> internal::MGTwoLevelTransferCore< dim, VectorType >::partitioner_fine_embedded
protectedinherited

Embedded partitioner for efficient communication if locally relevant DoFs are a subset of an external Partitioner object.

Definition at line 325 of file mg_transfer_matrix_free.h.

◆ buffer_coarse_embedded

template<int dim, typename VectorType >
AlignedVector<Number> internal::MGTwoLevelTransferCore< dim, VectorType >::buffer_coarse_embedded
mutableprotectedinherited

Buffer for efficient communication if locally relevant DoFs are a subset of an external Partitioner object.

Definition at line 331 of file mg_transfer_matrix_free.h.

◆ buffer_fine_embedded

template<int dim, typename VectorType >
AlignedVector<Number> internal::MGTwoLevelTransferCore< dim, VectorType >::buffer_fine_embedded
mutableprotectedinherited

Buffer for efficient communication if locally relevant DoFs are a subset of an external Partitioner object.

Definition at line 337 of file mg_transfer_matrix_free.h.

◆ partitioner_coarse

template<int dim, typename VectorType >
std::shared_ptr<const Utilities::MPI::Partitioner> MGTwoLevelTransferBase< dim, VectorType >::partitioner_coarse
inherited

Partitioner needed by the intermediate vector.

Definition at line 142 of file mg_transfer_matrix_free.h.

◆ partitioner_fine

template<int dim, typename VectorType >
std::shared_ptr<const Utilities::MPI::Partitioner> MGTwoLevelTransferBase< dim, VectorType >::partitioner_fine
inherited

Partitioner needed by the intermediate vector.

Definition at line 147 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 212 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 218 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 224 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 232 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 239 of file enable_observer_pointer.h.

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