PETScWrappers::PreconditionBase Class Reference

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

Inheritance diagram for PETScWrappers::PreconditionBase:

Public Member Functions
	PreconditionBase ()
virtual	~PreconditionBase ()
void	clear ()
void	vmult (VectorBase &dst, const VectorBase &src) const
void	Tvmult (VectorBase &dst, const VectorBase &src) const
const PC &	get_pc () const

Protected Member Functions
void	create_pc ()
	operator Mat () const

Protected Attributes
PC	pc
Mat	matrix

Friends
class	SolverBase

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
template<class Archive >
void	serialize (Archive &ar, const unsigned int version)
using	map_value_type = decltype(counter_map)::value_type
using	map_iterator = decltype(counter_map)::iterator
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 std::mutex	mutex
static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)
static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)
void	check_no_subscribers () const noexcept

Detailed Description

Base class for preconditioner classes using the PETSc functionality. The classes in this hierarchy don't do a whole lot, except for providing a function that sets the preconditioner and certain parameters on the preconditioning context of the solver. These classes are basically here only to allow a similar interface as already used for the deal.II solver and preconditioner classes.

Note that derived classes only provide interfaces to the relevant functionality of PETSc. PETSc does not implement all preconditioners for all matrix types. In particular, some preconditioners are not going to work for parallel jobs, such as for example the ILU preconditioner.

Definition at line 58 of file petsc_precondition.h.

Constructor & Destructor Documentation

PreconditionBase()

PETScWrappers::PreconditionBase::PreconditionBase

(

)

Constructor.

Definition at line 36 of file petsc_precondition.cc.

~PreconditionBase()

PETScWrappers::PreconditionBase::~PreconditionBase ( )

virtual

Destructor.

Definition at line 41 of file petsc_precondition.cc.

Member Function Documentation

clear()

void PETScWrappers::PreconditionBase::clear

(

)

Destroys the preconditioner, leaving an object like just after having called the constructor.

Definition at line 52 of file petsc_precondition.cc.

vmult()

void PETScWrappers::PreconditionBase::vmult	(	VectorBase &	dst,
		const VectorBase &	src
	)		const

Apply the preconditioner once to the given src vector.

Definition at line 66 of file petsc_precondition.cc.

Tvmult()

void PETScWrappers::PreconditionBase::Tvmult	(	VectorBase &	dst,
		const VectorBase &	src
	)		const

Apply the transpose preconditioner once to the given src vector.

Definition at line 76 of file petsc_precondition.cc.

get_pc()

const PC & PETScWrappers::PreconditionBase::get_pc

(

)

const

Give access to the underlying PETSc object.

Definition at line 113 of file petsc_precondition.cc.

create_pc()

void PETScWrappers::PreconditionBase::create_pc ( )

protected

Internal function to create the PETSc preconditioner object. Fails if called twice.

Definition at line 86 of file petsc_precondition.cc.

operator Mat()

PETScWrappers::PreconditionBase::operator Mat ( ) const

protected

Conversion operator to get a representation of the matrix that represents this preconditioner. We use this inside the actual solver, where we need to pass this matrix to the PETSc solvers.

Definition at line 119 of file petsc_precondition.cc.

Friends And Related Function Documentation

SolverBase

friend class SolverBase

friend

Definition at line 124 of file petsc_precondition.h.

Member Data Documentation

pc

PC PETScWrappers::PreconditionBase::pc

protected

the PETSc preconditioner object

Definition at line 101 of file petsc_precondition.h.

matrix

Mat PETScWrappers::PreconditionBase::matrix

protected

A pointer to the matrix that acts as a preconditioner.

Definition at line 106 of file petsc_precondition.h.

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

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