state_vector.h

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//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// Copyright (C) 2024 by the ryujin authors
//
 
#pragma once
 
#include "multicomponent_vector.h"
 
#include <deal.II/lac/la_parallel_block_vector.h>
 
namespace ryujin
{
#ifndef DOXYGEN
  /* Forward declaration */
  template <int dim, typename Number>
  class OfflineData;
#endif
 
  namespace Vectors
  {
    template <typename Number>
    using ScalarVector = dealii::LinearAlgebra::distributed::Vector<Number>;
 
    template <typename Number>
    using BlockVector = dealii::LinearAlgebra::distributed::BlockVector<Number>;
 
    template <typename Number, unsigned int problem_dim, unsigned int prec_dim>
    using StateVector = std::tuple<
        MultiComponentVector<Number, problem_dim> /*U*/,
        MultiComponentVector<Number, prec_dim> /*precomputed values*/,
        BlockVector<Number> /*parabolic state vector*/>;
 
 
    template <
        typename Description,
        int dim,
        typename Number,
        typename View =
            typename Description::template HyperbolicSystemView<dim, Number>,
        int problem_dimension = View::problem_dimension,
        int prec_dimension = View::n_precomputed_values>
    void debug_poison_constrained_dofs(
        StateVector<Number, problem_dimension, prec_dimension> &state_vector
        [[maybe_unused]],
        const OfflineData<dim, Number> &offline_data [[maybe_unused]])
    {
#ifdef DEBUG
      auto &[U, precomputed, V] = state_vector;
 
      const unsigned int n_owned = offline_data.n_locally_owned();
      const auto &partitioner = offline_data.scalar_partitioner();
 
      for (unsigned int i = 0; i < n_owned; ++i) {
        if (!offline_data.affine_constraints().is_constrained(
                partitioner->local_to_global(i)))
          continue;
        constexpr auto nan = std::numeric_limits<Number>::signaling_NaN();
        U.write_tensor(dealii::Tensor<1, problem_dimension, Number>() * nan, i);
      }
#endif
    }
 
 
    template <
        typename Description,
        int dim,
        typename Number,
        typename View =
            typename Description::template HyperbolicSystemView<dim, Number>,
        int problem_dimension = View::problem_dimension,
        int prec_dimension = View::n_precomputed_values>
    void debug_poison_precomputed_values(
        StateVector<Number, problem_dimension, prec_dimension> &state_vector
        [[maybe_unused]],
        const OfflineData<dim, Number> &offline_data [[maybe_unused]])
    {
#ifdef DEBUG
      auto &[U, precomputed, V] = state_vector;
 
      constexpr auto nan = std::numeric_limits<Number>::signaling_NaN();
      const unsigned int n_owned = offline_data.n_locally_owned();
      const auto block_size = offline_data.n_parabolic_state_vectors();
 
      for (unsigned int i = 0; i < n_owned; ++i) {
        precomputed.write_tensor(
            dealii::Tensor<1, prec_dimension, Number>() * nan, i);
        for (unsigned int b = 0; b < block_size; ++b) {
          V.block(b).local_element(i) = nan;
        }
      }
#endif
    }
 
 
    template <
        typename Description,
        int dim,
        typename Number,
        typename View =
            typename Description::template HyperbolicSystemView<dim, Number>,
        int problem_dimension = View::problem_dimension,
        int prec_dimension = View::n_precomputed_values>
    void reinit_state_vector(
        StateVector<Number, problem_dimension, prec_dimension> &state_vector,
        const OfflineData<dim, Number> &offline_data)
    {
      auto &[U, precomputed, V] = state_vector;
      U.reinit(offline_data.hyperbolic_vector_partitioner());
      precomputed.reinit(offline_data.precomputed_vector_partitioner());
 
      const auto block_size = offline_data.n_parabolic_state_vectors();
      V.reinit(block_size);
      for (unsigned int i = 0; i < block_size; ++i) {
        V.block(i).reinit(offline_data.scalar_partitioner());
      }
 
#ifdef DEBUG
      /* Poison all vectors: */
      using state_type = typename View::state_type;
 
      constexpr auto nan = std::numeric_limits<Number>::signaling_NaN();
 
      const unsigned int n_owned = offline_data.n_locally_owned();
      for (unsigned int i = 0; i < n_owned; ++i) {
        U.write_tensor(state_type{} * nan, i);
        precomputed.write_tensor(
            dealii::Tensor<1, prec_dimension, Number>() * nan, i);
        for (unsigned int b = 0; b < block_size; ++b) {
          V.block(b).local_element(i) = nan;
        }
      }
#endif
    }
  } // namespace Vectors
 
} // namespace ryujin