dof_manager_petsc.hh
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dof_manager_petsc.hh
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	/**
	* @file dof_manager_petsc.hh
	*
	* @author Nicolas Richart <nicolas.richart@epfl.ch>
	*
	* @date creation: Tue Aug 18 2015
	* @date last modification: Wed Jan 31 2018
	*
	* @brief PETSc implementation of the dof manager
	*
	* @section LICENSE
	*
	* Copyright (©) 2015-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
	* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
	*
	* Akantu is free software: you can redistribute it and/or modify it under the
	* terms of the GNU Lesser General Public License as published by the Free
	* Software Foundation, either version 3 of the License, or (at your option) any
	* later version.
	*
	* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
	* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
	* details.
	*
	* You should have received a copy of the GNU Lesser General Public License
	* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
	*
	*/
	/* -------------------------------------------------------------------------- */
	#include "dof_manager.hh"
	/* -------------------------------------------------------------------------- */
	#include <petscis.h>
	#include <petscvec.h>
	/* -------------------------------------------------------------------------- */

	#ifndef __AKANTU_DOF_MANAGER_PETSC_HH__
	#define __AKANTU_DOF_MANAGER_PETSC_HH__

	#define PETSc_call(func, ...) \
	do { \
	auto ierr = func(__VA_ARGS__); \
	if (PetscUnlikely(ierr != 0)) { \
	const char * desc; \
	PetscErrorMessage(ierr, &desc, nullptr); \
	AKANTU_EXCEPTION("Error in PETSc call to \'" << #func \
	<< "\': " << desc); \
	} \
	} while (false)

	namespace akantu {
	class SparseMatrixPETSc;
	}

	namespace akantu {

	class DOFManagerPETSc : public DOFManager {
	/* ------------------------------------------------------------------------ */
	/* Constructors/Destructors */
	/* ------------------------------------------------------------------------ */
	public:
	DOFManagerPETSc(const ID & id = "dof_manager_petsc",
	const MemoryID & memory_id = 0);
	DOFManagerPETSc(Mesh & mesh, const ID & id = "dof_manager_petsc",
	const MemoryID & memory_id = 0);

	virtual ~DOFManagerPETSc();

	protected:
	void init();

	struct DOFDataPETSc : public DOFData {
	explicit DOFDataPETSc(const ID & dof_id);

	/// local equation numbers in PETSc type
	IS is;
	};

	/* ------------------------------------------------------------------------ */
	/* Methods */
	/* ------------------------------------------------------------------------ */
	public:
	/// register an array of degree of freedom
	void registerDOFs(const ID & dof_id, Array<Real> & dofs_array,
	DOFSupportType & support_type);

	/// Assemble an array to the global residual array
	void assembleToResidual(const ID & dof_id,
	const Array<Real> & array_to_assemble,
	Real scale_factor = 1.) override;

	/**
	* Assemble elementary values to the global residual array. The dof number is
	* implicitly considered as conn(el, n) * nb_nodes_per_element + d.
	* With 0 < n < nb_nodes_per_element and 0 < d < nb_dof_per_node
	**/
	void assembleElementalMatricesToMatrix(
	const ID & matrix_id, const ID & dof_id,
	const Array<Real> & elementary_mat, const ElementType & type,
	const GhostType & ghost_type, const MatrixType & elemental_matrix_type,
	const Array<UInt> & filter_elements) override;

	void clearResidual() override;
	void clearMatrix(const ID & mtx) override;
	void clearLumpedMatrix(const ID & mtx) override;

	protected:
	void getLumpedMatrixPerDOFs(const ID & dof_id, const ID & lumped_mtx,
	Array<Real> & lumped) override;
	void getSolutionPerDOFs(const ID & dof_id,
	Array<Real> & solution_array) override;

	/* ------------------------------------------------------------------------ */
	/* Accessors */
	/* ------------------------------------------------------------------------ */
	public:
	/// Get an instance of a new SparseMatrix
	SparseMatrix & getNewMatrix(const ID & matrix_id,
	const MatrixType & matrix_type) override;

	/// Get an instance of a new SparseMatrix as a copy of the SparseMatrix
	/// matrix_to_copy_id
	SparseMatrix & getNewMatrix(const ID & matrix_id,
	const ID & matrix_to_copy_id) override;

	/// Get the reference of an existing matrix
	SparseMatrixPETSc & getMatrix(const ID & matrix_id);

	/// Get the solution array
	AKANTU_GET_MACRO_NOT_CONST(GlobalSolution, this->solution, Vec &);
	/// Get the residual array
	AKANTU_GET_MACRO_NOT_CONST(Residual, this->residual, Vec &);

	/// Get the blocked dofs array
	// AKANTU_GET_MACRO(BlockedDOFs, blocked_dofs, const Array<bool> &);
	AKANTU_GET_MACRO(MPIComm, mpi_communicator, MPI_Comm);

	/* ------------------------------------------------------------------------ */
	/* Class Members */
	/* ------------------------------------------------------------------------ */
	private:
	typedef std::map<ID, SparseMatrixPETSc *> PETScMatrixMap;

	/// list of matrices registered to the dof manager
	PETScMatrixMap petsc_matrices;

	/// PETSc version of the solution
	Vec solution;

	/// PETSc version of the residual
	Vec residual;

	/// PETSc local to global mapping of dofs
	ISLocalToGlobalMapping is_ltog_map;

	/// Communicator associated to PETSc
	MPI_Comm mpi_communicator;

	static int petsc_dof_manager_instances;
	};

	} // akantu

	#endif /* __AKANTU_DOF_MANAGER_PETSC_HH__ */

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