ComputeLinearFVGreenGaussGradientFaceThread.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#pragma once

#include "MooseTypes.h"
#include "MooseMesh.h"
#include "MooseLinearVariableFV.h"

// libmesh
#include "libmesh/elem_range.h"
#include "libmesh/threads.h"
#include "libmesh/system.h"

class FEProblemBase;
class SystemBase;

class ComputeLinearFVGreenGaussGradientFaceThread
{
public:
  ComputeLinearFVGreenGaussGradientFaceThread(
      FEProblemBase & fe_problem,
      SystemBase & system,
      std::vector<std::unique_ptr<NumericVector<Number>>> & temporary_gradient);

  ComputeLinearFVGreenGaussGradientFaceThread(ComputeLinearFVGreenGaussGradientFaceThread & x,
                                              Threads::split split);
  using FaceInfoRange = StoredRange<MooseMesh::const_face_info_iterator, const FaceInfo *>;

  void operator()(const FaceInfoRange & range);

  void join(const ComputeLinearFVGreenGaussGradientFaceThread & y);

protected:
  FEProblemBase & _fe_problem;

  const unsigned int _dim;

  SystemBase & _system;

  const libMesh::System & _libmesh_system;

  const unsigned int _system_number;

  THREAD_ID _tid;

  MooseLinearVariableFV<Real> * _current_var;

  std::vector<std::unique_ptr<NumericVector<Number>>> & _temporary_gradient;
};