petsc_linear_solver.h File Reference

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Classes
class	libMesh::PetscLinearSolver< T >
Namespaces
namespace	libMesh
Typedefs
typedef int	PetscInt
Functions
PetscErrorCode	__libmesh_petsc_preconditioner_setup (void *ctx)
PetscErrorCode	__libmesh_petsc_preconditioner_apply (void *ctx, Vec x, Vec y)
PetscErrorCode	__libmesh_petsc_preconditioner_setup (PC)
PetscErrorCode	__libmesh_petsc_preconditioner_apply (PC, Vec x, Vec y)
Variables
EXTERN_C_FOR_PETSC_BEGIN EXTERN_C_FOR_PETSC_END typedef int	PetscErrorCode

---

Typedef Documentation

typedef int PetscInt

Definition at line 61 of file petsc_linear_solver.h.

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Function Documentation

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

This function is called by PETSc to acctually apply the preconditioner. ctx will hold the Preconditioner.

Definition at line 63 of file petsc_linear_solver.C.

Referenced by libMesh::PetscNonlinearSolver< T >::init(), and libMesh::PetscLinearSolver< T >::init().

  {
    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;
  }

PetscErrorCode __libmesh_petsc_preconditioner_apply	(	PC	,
		Vec	x,
		Vec	y
	)

Definition at line 89 of file petsc_linear_solver.C.

References libMesh::ierr.

  {
    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;
  }

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 50 of file petsc_linear_solver.C.

Referenced by libMesh::PetscNonlinearSolver< T >::init(), and libMesh::PetscLinearSolver< T >::init().

  {
    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;
  }

PetscErrorCode __libmesh_petsc_preconditioner_setup

(

PC

)

Definition at line 75 of file petsc_linear_solver.C.

References libMesh::ierr.

  {
    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;
  }

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Variable Documentation

EXTERN_C_FOR_PETSC_BEGIN EXTERN_C_FOR_PETSC_END typedef int PetscErrorCode

Petsc include files.

Definition at line 60 of file petsc_linear_solver.h.

Referenced by DMlibMeshGetSystem(), and DMlibMeshSetSystem().