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

Inheritance diagram for SolverSelector< VectorType >:

Public Types
using	vector_type = VectorType

Public Member Functions
	SolverSelector ()=default

	SolverSelector (const std::string &name, SolverControl &control)

virtual	~SolverSelector () override=default

template<class Matrix , class Preconditioner >
void	solve (const Matrix &A, VectorType &x, const VectorType &b, const Preconditioner &precond) const

void	select (const std::string &name)

void	set_control (SolverControl &ctrl)

void	set_data (const typename SolverRichardson< VectorType >::AdditionalData &data)

void	set_data (const typename SolverCG< VectorType >::AdditionalData &data)

void	set_data (const typename SolverMinRes< VectorType >::AdditionalData &data)

void	set_data (const typename SolverBicgstab< VectorType >::AdditionalData &data)

void	set_data (const typename SolverGMRES< VectorType >::AdditionalData &data)

void	set_data (const typename SolverFGMRES< VectorType >::AdditionalData &data)

Static Public Member Functions
static std::string	get_solver_names ()

static ::ExceptionBase &	ExcSolverDoesNotExist (std::string arg1)

Protected Attributes
SmartPointer< SolverControl, SolverSelector< VectorType > >	control

std::string	solver_name

Private Attributes
SolverRichardson< VectorType >::AdditionalData	richardson_data

SolverCG< VectorType >::AdditionalData	cg_data

SolverMinRes< VectorType >::AdditionalData	minres_data

SolverBicgstab< VectorType >::AdditionalData	bicgstab_data

SolverGMRES< VectorType >::AdditionalData	gmres_data

SolverFGMRES< VectorType >::AdditionalData	fgmres_data

Subscriptor functionality
Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class.
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

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)

static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)

static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

using	map_value_type = decltype(counter_map)::value_type

using	map_iterator = decltype(counter_map)::iterator

static std::mutex	mutex

void	check_no_subscribers () const noexcept

Detailed Description

template<typename VectorType = Vector<double>>
class SolverSelector< VectorType >

Selects a solver by changing a parameter.

By calling the solve function of this SolverSelector, it selects the solve function of that Solver that was specified in the constructor of this class.

Usage

The simplest use of this class is the following:

// generate a @p SolverSelector that calls the @p SolverCG
SolverControl control;
SolverSelector<Vector<double> > solver_selector ("cg", control);
 
// generate e.g. a @p PreconditionRelaxation
PreconditionRelaxation<SparseMatrix<double>, Vector<double> >
  preconditioning(
    A, &SparseMatrix<double>::template precondition_SSOR<double>,0.8);
 
// call the @p solve function with this preconditioning as last argument
solver_selector.solve(A,x,b,preconditioning);

But the full usefulness of the SolverSelector class is not clear until the presentation of the following example that assumes the user using the ParameterHandler class and having declared a "solver" entry, e.g. with

Parameter_Handler prm;
prm.declare_entry ("solver", "none",
                   Patterns::Selection(
                     SolverSelector<>::get_solver_names()));
...

Assuming that in the users parameter file there exists the line

set solver = cg

LinearAlgebra::CUDAWrappers::kernel::set

__global__ void set(Number *val, const Number s, const size_type N)

then the constructor call in the above example can be written as

SolverSelector<SparseMatrix<double>, Vector<double> >

solver_selector(prm.get("solver"), control);

If at some time there exists a new solver "xyz" then the user does not need to change their program. Only in the implementation of the SolverSelector the calling of this solver has to be added and each user with program lines quoted above only needs to 'set solver = xyz' in their parameter file to get access to that new solver.

Definition at line 89 of file solver_selector.h.

Member Typedef Documentation

◆ vector_type

template<typename VectorType = Vector<double>>

using SolverSelector< VectorType >::vector_type = VectorType

An alias for the underlying vector type

Definition at line 95 of file solver_selector.h.

Constructor & Destructor Documentation

◆ SolverSelector() [1/2]

template<typename VectorType = Vector<double>>

SolverSelector< VectorType >::SolverSelector ( )

default

Constructor, filling in default values

◆ SolverSelector() [2/2]

template<typename VectorType >

SolverSelector< VectorType >::SolverSelector	(	const std::string &	name,
		SolverControl &	control
	)

Constructor, selecting the solver name and the SolverControl object control already.

Definition at line 248 of file solver_selector.h.

◆ ~SolverSelector()

template<typename VectorType = Vector<double>>

virtual SolverSelector< VectorType >::~SolverSelector ( )

overridevirtualdefault

Destructor

Member Function Documentation

◆ solve()

template<typename VectorType >

template<class Matrix , class Preconditioner >

void SolverSelector< VectorType >::solve	(	const Matrix &	A,
		VectorType &	x,
		const VectorType &	b,
		const Preconditioner &	precond
	)		const

Solver procedure. Calls the solve function of the solver whose SolverName was specified in the constructor.

Definition at line 268 of file solver_selector.h.

◆ select()

template<typename VectorType >

void SolverSelector< VectorType >::select ( const std::string & name )

Select a new solver. Note that all solver names used in this class are all lower case.

Definition at line 258 of file solver_selector.h.

◆ set_control()

template<typename VectorType >

void SolverSelector< VectorType >::set_control ( SolverControl & ctrl )

Set a new SolverControl. This needs to be set before solving.

Definition at line 311 of file solver_selector.h.

◆ set_data() [1/6]

template<typename VectorType >

void SolverSelector< VectorType >::set_data ( const typename SolverRichardson< VectorType >::AdditionalData & data )

Set the additional data. For more information see the Solver class.

Definition at line 349 of file solver_selector.h.

◆ set_data() [2/6]

template<typename VectorType >

void SolverSelector< VectorType >::set_data ( const typename SolverCG< VectorType >::AdditionalData & data )

Set the additional data. For more information see the Solver class.

Definition at line 359 of file solver_selector.h.

◆ set_data() [3/6]

template<typename VectorType >

void SolverSelector< VectorType >::set_data ( const typename SolverMinRes< VectorType >::AdditionalData & data )

Set the additional data. For more information see the Solver class.

Definition at line 369 of file solver_selector.h.

◆ set_data() [4/6]

template<typename VectorType >

void SolverSelector< VectorType >::set_data ( const typename SolverBicgstab< VectorType >::AdditionalData & data )

Set the additional data. For more information see the Solver class.

Definition at line 379 of file solver_selector.h.

◆ set_data() [5/6]

template<typename VectorType >

void SolverSelector< VectorType >::set_data ( const typename SolverGMRES< VectorType >::AdditionalData & data )

Set the additional data. For more information see the Solver class.

Definition at line 329 of file solver_selector.h.

◆ set_data() [6/6]

template<typename VectorType >

void SolverSelector< VectorType >::set_data ( const typename SolverFGMRES< VectorType >::AdditionalData & data )

Set the additional data. For more information see the Solver class.

Definition at line 339 of file solver_selector.h.

◆ get_solver_names()

template<typename VectorType >

std::string SolverSelector< VectorType >::get_solver_names

static

Get the names of all implemented solvers. The list of possible options includes:

"richardson"
"cg"
"bicgstab"
"gmres"
"fgmres"
"minres"

Definition at line 320 of file solver_selector.h.

Member Data Documentation

◆ control

template<typename VectorType = Vector<double>>

SmartPointer<SolverControl, SolverSelector<VectorType> > SolverSelector< VectorType >::control

protected

Stores the SolverControl that is needed in the constructor of each Solver class. This can be changed with set_control().

Definition at line 204 of file solver_selector.h.

◆ solver_name

template<typename VectorType = Vector<double>>

std::string SolverSelector< VectorType >::solver_name

protected

Stores the name of the solver.

Definition at line 209 of file solver_selector.h.

◆ richardson_data

template<typename VectorType = Vector<double>>

SolverRichardson<VectorType>::AdditionalData SolverSelector< VectorType >::richardson_data

private

Stores the additional data.

Definition at line 215 of file solver_selector.h.

◆ cg_data

template<typename VectorType = Vector<double>>

SolverCG<VectorType>::AdditionalData SolverSelector< VectorType >::cg_data

private

Stores the additional data.

Definition at line 220 of file solver_selector.h.

◆ minres_data

template<typename VectorType = Vector<double>>

SolverMinRes<VectorType>::AdditionalData SolverSelector< VectorType >::minres_data

private

Stores the additional data.

Definition at line 225 of file solver_selector.h.

◆ bicgstab_data

template<typename VectorType = Vector<double>>

SolverBicgstab<VectorType>::AdditionalData SolverSelector< VectorType >::bicgstab_data

private

Stores the additional data.

Definition at line 230 of file solver_selector.h.

◆ gmres_data

template<typename VectorType = Vector<double>>

SolverGMRES<VectorType>::AdditionalData SolverSelector< VectorType >::gmres_data

private

Stores the additional data.

Definition at line 235 of file solver_selector.h.

◆ fgmres_data

template<typename VectorType = Vector<double>>

SolverFGMRES<VectorType>::AdditionalData SolverSelector< VectorType >::fgmres_data

private

Stores the additional data.

Definition at line 240 of file solver_selector.h.

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

include/deal.II/lac/solver_selector.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Attributes

Private Attributes

Subscriptor functionality

Detailed Description

Usage

Member Typedef Documentation

◆ vector_type

Constructor & Destructor Documentation

◆ SolverSelector() [1/2]

◆ SolverSelector() [2/2]

◆ ~SolverSelector()

Member Function Documentation

◆ solve()

◆ select()

◆ set_control()

◆ set_data() [1/6]

◆ set_data() [2/6]

◆ set_data() [3/6]

◆ set_data() [4/6]

◆ set_data() [5/6]

◆ set_data() [6/6]

◆ get_solver_names()

Member Data Documentation

◆ control

◆ solver_name

◆ richardson_data

◆ cg_data

◆ minres_data

◆ bicgstab_data

◆ gmres_data

◆ fgmres_data