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

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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	(	PC	,
		Vec	x,
		Vec	y
	)

Definition at line 91 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);
    PetscVector<Number> y_vec(y);

    preconditioner->apply(x_vec,y_vec);

    return 0;
  }

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 62 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);
    PetscVector<Number> y_vec(y);

    preconditioner->apply(x_vec,y_vec);

    return 0;
  }

PetscErrorCode __libmesh_petsc_preconditioner_setup

(

PC

)

Definition at line 74 of file petsc_linear_solver.C.

References libMesh::err.

  {
    void *ctx;
    PetscErrorCode ierr = PCShellGetContext(pc,&ctx);CHKERRQ(ierr);
    Preconditioner<Number> * preconditioner = static_cast<Preconditioner<Number>*>(ctx);

    if(!preconditioner->initialized())
    {
      err<<"Preconditioner not initialized!  Make sure you call init() before solve!"<<std::endl;
      libmesh_error();
    }

    preconditioner->setup();

    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 46 of file petsc_linear_solver.C.

References libMesh::err.

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

  {
    Preconditioner<Number> * preconditioner = static_cast<Preconditioner<Number>*>(ctx);

    if(!preconditioner->initialized())
    {
      err<<"Preconditioner not initialized!  Make sure you call init() before solve!"<<std::endl;
      libmesh_error();
    }

    preconditioner->setup();

    return 0;
  }

---

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 DMCreate_libMesh(), DMCreateDomainDecomposition_libMesh(), DMCreateDomainDecompositionDM_libMesh(), DMCreateFieldDecomposition_libMesh(), DMCreateFieldDecompositionDM_libMesh(), DMCreateGlobalVector_libMesh(), DMCreateLibMesh(), DMCreateMatrix_libMesh(), DMDestroy_libMesh(), DMFunction_libMesh(), DMJacobian_libMesh(), DMLibMeshCreateDomainDecompositionDM(), DMLibMeshCreateFieldDecompositionDM(), DMLibMeshGetBlocks(), DMLibMeshGetSystem(), DMLibMeshGetVariables(), DMLibMeshParseDecompositionDescriptor_Private(), DMLibMeshSetSystem(), DMLibMeshSetUpName_Private(), DMSetUp_libMesh(), DMVariableBounds_libMesh(), and DMView_libMesh().