petsc_linear_solver.h File Reference

Go to the source code of this file.

Classes
class	libMesh::PetscMatrix< T >
	This class provides a nice interface to the PETSc C-based data structures for parallel, sparse matrices. More...
class	libMesh::PetscLinearSolver< T >
	This class provides an interface to PETSc iterative solvers that is compatible with the libMesh LinearSolver<> More...

Namespaces
	libMesh
	The libMesh namespace provides an interface to certain functionality in the library.

Functions
PetscErrorCode	libmesh_petsc_preconditioner_setup (void *ctx)
	This function is called by PETSc to initialize the preconditioner. More...
PetscErrorCode	libmesh_petsc_preconditioner_apply (void *ctx, Vec x, Vec y)
	This function is called by PETSc to actually apply the preconditioner. More...
PetscErrorCode	libmesh_petsc_preconditioner_setup (PC)
PetscErrorCode	libmesh_petsc_preconditioner_apply (PC, Vec x, Vec y)
PetscErrorCode	__libmesh_petsc_preconditioner_setup (void *ctx)
	This function is called by PETSc to initialize the preconditioner. More...
PetscErrorCode	__libmesh_petsc_preconditioner_apply (void *ctx, Vec x, Vec y)
	This function is called by PETSc to actually apply the preconditioner. More...
PetscErrorCode	__libmesh_petsc_preconditioner_setup (PC)
PetscErrorCode	__libmesh_petsc_preconditioner_apply (PC, Vec x, Vec y)

Function Documentation

__libmesh_petsc_preconditioner_apply() [1/2]

PetscErrorCode __libmesh_petsc_preconditioner_apply	(	PC	,
		Vec	x,
		Vec	y
	)

Definition at line 124 of file petsc_linear_solver.C.

  {
    libmesh_deprecated();
    return libmesh_petsc_preconditioner_apply(pc, x, y);
  }

References libMesh::libmesh_petsc_preconditioner_apply().

__libmesh_petsc_preconditioner_apply() [2/2]

PetscErrorCode __libmesh_petsc_preconditioner_apply	(	void *	ctx,
		Vec	x,
		Vec	y
	)

This function is called by PETSc to actually apply the preconditioner.

ctx will hold the Preconditioner.

Definition at line 111 of file petsc_linear_solver.C.

  {
    libmesh_deprecated();
    return libmesh_petsc_preconditioner_apply(ctx, x, y);
  }

References libMesh::ctx, and libMesh::libmesh_petsc_preconditioner_apply().

__libmesh_petsc_preconditioner_setup() [1/2]

PetscErrorCode __libmesh_petsc_preconditioner_setup

(

PC

)

Definition at line 118 of file petsc_linear_solver.C.

  {
    libmesh_deprecated();
    return libmesh_petsc_preconditioner_setup(pc);
  }

References libMesh::libmesh_petsc_preconditioner_setup().

__libmesh_petsc_preconditioner_setup() [2/2]

PetscErrorCode __libmesh_petsc_preconditioner_setup

(

void *

ctx

)

This function is called by PETSc to initialize the preconditioner.

ctx will hold the Preconditioner.

Definition at line 105 of file petsc_linear_solver.C.

  {
    libmesh_deprecated();
    return libmesh_petsc_preconditioner_setup(ctx);
  }

References libMesh::ctx, and libMesh::libmesh_petsc_preconditioner_setup().

libmesh_petsc_preconditioner_apply() [1/2]

PetscErrorCode libmesh_petsc_preconditioner_apply	(	PC	,
		Vec	x,
		Vec	y
	)

Definition at line 88 of file petsc_linear_solver.C.

  {
    void * ctx;
    PetscErrorCode ierr = PCShellGetContext(pc,&ctx);CHKERRQ(ierr);
    Preconditioner<Number> * preconditioner = static_cast<Preconditioner<Number> *>(ctx);
 
    PetscVector<Number> x_vec(x, preconditioner->comm());
    PetscVector<Number> y_vec(y, preconditioner->comm());
 
    preconditioner->apply(x_vec,y_vec);
 
    return 0;
  }

References libMesh::Preconditioner< T >::apply(), libMesh::CHKERRQ(), libMesh::ParallelObject::comm(), libMesh::ctx, and libMesh::ierr.

Referenced by libMesh::PetscLinearSolver< Number >::init().

libmesh_petsc_preconditioner_apply() [2/2]

PetscErrorCode libmesh_petsc_preconditioner_apply	(	void *	ctx,
		Vec	x,
		Vec	y
	)

This function is called by PETSc to actually apply the preconditioner.

ctx will hold the Preconditioner.

Definition at line 62 of file petsc_linear_solver.C.

  {
    Preconditioner<Number> * preconditioner = static_cast<Preconditioner<Number> *>(ctx);
 
    PetscVector<Number> x_vec(x, preconditioner->comm());
    PetscVector<Number> y_vec(y, preconditioner->comm());
 
    preconditioner->apply(x_vec,y_vec);
 
    return 0;
  }

References libMesh::Preconditioner< T >::apply(), libMesh::ParallelObject::comm(), and libMesh::ctx.

Referenced by libMesh::__libmesh_petsc_preconditioner_apply(), and libMesh::PetscNonlinearSolver< Number >::init().

libmesh_petsc_preconditioner_setup() [1/2]

PetscErrorCode libmesh_petsc_preconditioner_setup

(

PC

)

Definition at line 74 of file petsc_linear_solver.C.

  {
    void * ctx;
    PetscErrorCode ierr = PCShellGetContext(pc,&ctx);CHKERRQ(ierr);
    Preconditioner<Number> * preconditioner = static_cast<Preconditioner<Number> *>(ctx);
 
    if (!preconditioner->initialized())
      libmesh_error_msg("Preconditioner not initialized!  Make sure you call init() before solve!");
 
    preconditioner->setup();
 
    return 0;
  }

References libMesh::CHKERRQ(), libMesh::ctx, libMesh::ierr, libMesh::Preconditioner< T >::initialized(), and libMesh::Preconditioner< T >::setup().

Referenced by libMesh::PetscLinearSolver< Number >::init().

libmesh_petsc_preconditioner_setup() [2/2]

PetscErrorCode libmesh_petsc_preconditioner_setup

(

void *

ctx

)

This function is called by PETSc to initialize the preconditioner.

ctx will hold the Preconditioner.

Definition at line 49 of file petsc_linear_solver.C.

  {
    Preconditioner<Number> * preconditioner = static_cast<Preconditioner<Number> *>(ctx);
 
    if (!preconditioner->initialized())
      libmesh_error_msg("Preconditioner not initialized!  Make sure you call init() before solve!");
 
    preconditioner->setup();
 
    return 0;
  }

References libMesh::ctx, libMesh::Preconditioner< T >::initialized(), and libMesh::Preconditioner< T >::setup().

Referenced by libMesh::__libmesh_petsc_preconditioner_setup(), and libMesh::PetscNonlinearSolver< Number >::init().