SparsityPatternBase Class Reference

#include <deal.II/lac/sparsity_pattern_base.h>

Inheritance diagram for SparsityPatternBase:

Public Types
using	size_type = types::global_dof_index

Public Member Functions
	SparsityPatternBase ()
	SparsityPatternBase (const size_type rows, const size_type cols)
	SparsityPatternBase (const SparsityPatternBase &sparsity_pattern)=default
	SparsityPatternBase (SparsityPatternBase &&sparsity_pattern) noexcept=default
SparsityPatternBase &	operator= (const SparsityPatternBase &sparsity_pattern)=default
SparsityPatternBase &	operator= (SparsityPatternBase &&sparsity_pattern) noexcept=default
size_type	n_rows () const
size_type	n_cols () const
virtual void	add_row_entries (const size_type &row, const ArrayView< const size_type > &columns, const bool indices_are_sorted=false)=0
virtual void	add_entries (const ArrayView< const std::pair< size_type, size_type > > &entries)
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)

Protected Member Functions
virtual void	resize (const size_type rows, const size_type cols)

Protected Attributes
size_type	rows
size_type	cols

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

Base class for all sparsity patterns, defining a common interface by which new values can be added.

Definition at line 38 of file sparsity_pattern_base.h.

Member Typedef Documentation

size_type

using SparsityPatternBase::size_type = types::global_dof_index

Declare type for container size.

Definition at line 44 of file sparsity_pattern_base.h.

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

SparsityPatternBase() [1/4]

SparsityPatternBase::SparsityPatternBase

(

)

Constructor. Sets up an empty (zero-by-zero) sparsity pattern.

SparsityPatternBase() [2/4]

SparsityPatternBase::SparsityPatternBase	(	const size_type	rows,
		const size_type	cols )

Constructor. Sets up a rows by cols sparsity pattern.

SparsityPatternBase() [3/4]

SparsityPatternBase::SparsityPatternBase ( const SparsityPatternBase & sparsity_pattern )

default

Copy constructor.

SparsityPatternBase() [4/4]

SparsityPatternBase::SparsityPatternBase ( SparsityPatternBase && sparsity_pattern )

defaultnoexcept

Move constructor.

Member Function Documentation

operator=() [1/2]

SparsityPatternBase & SparsityPatternBase::operator= ( const SparsityPatternBase & sparsity_pattern )

default

Assignment operator.

operator=() [2/2]

SparsityPatternBase & SparsityPatternBase::operator= ( SparsityPatternBase && sparsity_pattern )

defaultnoexcept

Move assignment operator.

n_rows()

size_type SparsityPatternBase::n_rows

(

)

const

Return number of rows of this matrix, which equals the dimension of the image space.

n_cols()

size_type SparsityPatternBase::n_cols

(

)

const

Return number of columns of this matrix, which equals the dimension of the range space.

add_row_entries()

virtual void SparsityPatternBase::add_row_entries ( const size_type & row, const ArrayView< const size_type > & columns, const bool indices_are_sorted = false )

pure virtual

Optimized function for adding new entries to a given row.

Implemented in BlockSparsityPatternBase< SparsityPatternType >, BlockSparsityPatternBase< DynamicSparsityPattern >, BlockSparsityPatternBase< SparsityPattern >, DynamicSparsityPattern, SparsityPattern, and TrilinosWrappers::SparsityPattern.

add_entries()

void SparsityPatternBase::add_entries ( const ArrayView< const std::pair< size_type, size_type > > & entries )

virtual

General function for adding new entries from an unsorted list of pairs.

This function is useful when multiple entries need to be added which do not correspond to a particular row, e.g., when assembling a flux sparsity pattern.

Reimplemented in BlockSparsityPatternBase< SparsityPatternType >, BlockSparsityPatternBase< DynamicSparsityPattern >, BlockSparsityPatternBase< SparsityPattern >, DynamicSparsityPattern, LinearAlgebra::TpetraWrappers::SparsityPattern< MemorySpace >, LinearAlgebra::TpetraWrappers::SparsityPattern< ::MemorySpace::Host >, LinearAlgebra::TpetraWrappers::SparsityPattern< MemorySpace >, SparsityPattern, and TrilinosWrappers::SparsityPattern.

Definition at line 25 of file sparsity_pattern_base.cc.

resize()

virtual void SparsityPatternBase::resize ( const size_type rows, const size_type cols )

protectedvirtual

Internal function for updating the stored size of the sparsity pattern.

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

rows

size_type SparsityPatternBase::rows

protected

Number of rows that this sparsity pattern shall represent.

Definition at line 121 of file sparsity_pattern_base.h.

cols

size_type SparsityPatternBase::cols

protected

Number of columns that this sparsity pattern shall represent.

Definition at line 126 of file sparsity_pattern_base.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.

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

• include/deal.II/lac/sparsity_pattern_base.h
• source/lac/sparsity_pattern_base.cc