libmesh.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2018 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner

// This library 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 2.1 of the License, or (at your option) any later version.

// This library 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 this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



#ifndef LIBMESH_LIBMESH_H
#define LIBMESH_LIBMESH_H


// Local includes
#include "libmesh/libmesh_common.h"
#include "libmesh/libmesh_base.h"
#include "libmesh/parallel.h"

#ifdef LIBMESH_FORWARD_DECLARE_ENUMS
namespace libMesh
{
enum SolverPackage : int;
}
#else
#include "libmesh/enum_solver_package.h"
#endif

// C++ includes
#include <string>
#include <vector>

// For dealing with MPI stuff in VTK.
#if defined(LIBMESH_HAVE_MPI) && defined(LIBMESH_HAVE_VTK)
class vtkMPIController;
#endif

namespace libMesh
{

class LibMeshInit
{
public:
#ifdef LIBMESH_HAVE_MPI

  LibMeshInit(int argc, const char * const * argv,
              MPI_Comm COMM_WORLD_IN=MPI_COMM_WORLD);
#else
  LibMeshInit(int argc, const char * const * argv);
#endif

  virtual ~LibMeshInit();

  const Parallel::Communicator & comm() const { return _comm; }

  Parallel::Communicator & comm() { return _comm; }

private:
  Parallel::Communicator _comm;

#if defined(LIBMESH_HAVE_MPI) && defined(LIBMESH_HAVE_VTK)
  // VTK object for dealing with MPI stuff in VTK.
  // This can't be a std::unique_ptr because VTK makes the destructor
  // protected and forces us to use a named destructor manually
  vtkMPIController * _vtk_mpi_controller;
#endif
};

bool initialized ();

bool closed ();

void enableFPE(bool on);

void enableSEGV(bool on);

bool on_command_line (std::string arg);

template <typename T>
T command_line_value (const std::string &, T);
template <typename T>
T command_line_value (const std::vector<std::string> &, T);

template <typename T>
T command_line_next (std::string name, T default_value);

template <typename T>
void command_line_vector (const std::string &, std::vector<T> &);

#ifdef LIBMESH_USE_COMPLEX_NUMBERS
extern const Number imaginary;
#endif

SolverPackage default_solver_package ();

const Real pi =
  static_cast<Real>(3.1415926535897932384626433832795029L);

const Number zero = 0.;

const unsigned int invalid_uint = static_cast<unsigned int>(-1);

} // namespace libMesh

#endif // LIBMESH_LIBMESH_H