Reference documentation for deal.II version GIT relicensing-214-g6e74dec06b 2024-03-27 18:10:01+00:00
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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 | List of all members
MGTransferBlockMatrixFreeBase< dim, Number, TransferType > Class Template Referenceabstract

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

Inheritance diagram for MGTransferBlockMatrixFreeBase< dim, Number, TransferType >:
Inheritance graph
[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)
 
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 ::ExceptionBaseExcInUse (int arg1, std::string arg2, std::string arg3)
 
static ::ExceptionBaseExcNoSubscriber (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 intcounter
 
std::map< std::string, unsigned intcounter_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 Subscriptor::map_value_type = decltype(counter_map)::value_type
privateinherited

The data type used in counter_map.

Definition at line 229 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 234 of file subscriptor.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_levelThe index of the level to prolongate to, which is the level of dst.
srcis a vector with as many elements as there are degrees of freedom on the coarser level involved.
dsthas 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_levelThe index of the level to restrict from, which is the level of src.
srcis a vector with as many elements as there are degrees of freedom on the finer level involved.
dsthas 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 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 135 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 155 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 203 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 52 of file subscriptor.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> 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 218 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 224 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 240 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 248 of file subscriptor.h.

◆ mutex

std::mutex Subscriptor::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 271 of file subscriptor.h.


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