KokkosTimeKernel.h

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//* This file is part of the MOOSE framework
//* https://www.mooseframework.org
//*
//* 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 "KokkosKernel.h"

namespace Moose
{
namespace Kokkos
{

class TimeKernel : public Kernel
{
public:
  static InputParameters validParams();

  TimeKernel(const InputParameters & parameters);

  KOKKOS_FUNCTION void computeResidualAdditional(const unsigned int /* ib */,
                                                 const unsigned int /* ie */,
                                                 AssemblyDatum & /* datum */,
                                                 Real * /* local_re */) const
  {
  }

  template <typename Derived>
  KOKKOS_FUNCTION void computeResidualInternal(const Derived & kernel, AssemblyDatum & datum) const;

protected:
  const VariableValue _u_dot;
  const Scalar<const Real> _du_dot_du;
};

template <typename Derived>
KOKKOS_FUNCTION void
TimeKernel::computeResidualInternal(const Derived & kernel, AssemblyDatum & datum) const
{
  ResidualObject::computeResidualInternal(
      datum,
      [&](Real * local_re, const unsigned int ib, const unsigned int ie)
      {
        for (unsigned int qp = 0; qp < datum.n_qps(); ++qp)
        {
          datum.reinit();

          for (unsigned int i = ib; i < ie; ++i)
            local_re[i] += datum.JxW(qp) * kernel.computeQpResidual(i, qp, datum);
        }

        kernel.computeResidualAdditional(ib, ie, datum, local_re);
      });
}

} // namespace Kokkos
} // namespace Moose