18581001536

Committed 16 Oct 2025 03:16PM UTC coverage: 75.124% (-0.06%) from 75.188%

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Merge pull request #797 from wdhawkins/problem_updates

Minor refactoring of problem classes

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/modules/linear_boltzmann_solvers/lbs_problem/lbs_problem.h

// SPDX-FileCopyrightText: 2024 The OpenSn Authors <https://open-sn.github.io/opensn/>
// SPDX-License-Identifier: MIT

#pragma once

#include "modules/problem.h"
#include "modules/linear_boltzmann_solvers/discrete_ordinates_problem/sweep/sweep.h"
#include "modules/linear_boltzmann_solvers/lbs_problem/groupset/lbs_groupset.h"
#include "modules/linear_boltzmann_solvers/lbs_problem/point_source/point_source.h"
#include "modules/linear_boltzmann_solvers/lbs_problem/volumetric_source/volumetric_source.h"
#include "modules/linear_boltzmann_solvers/lbs_problem/lbs_structs.h"
#include "framework/math/spatial_discretization/spatial_discretization.h"
#include "framework/mesh/mesh_continuum/mesh_continuum.h"
#include "framework/math/linear_solver/linear_solver.h"
#include "framework/math/spatial_discretization/finite_element/unit_cell_matrices.h"
#include <petscksp.h>
#include <any>
#include <chrono>

namespace opensn
{

class MPICommunicatorSet;
class GridFaceHistogram;
class TimeIntegration;
class AGSLinearSolver;
class WGSLinearSolver;
struct WGSContext;

/// Base class for all Linear Boltzmann Solvers.
class LBSProblem : public Problem
{
public:
  explicit LBSProblem(const std::string& name, std::shared_ptr<MeshContinuum> grid);

  /// Input parameters based construction.
  explicit LBSProblem(const InputParameters& params);

  LBSProblem(const LBSProblem&) = delete;

  LBSProblem& operator=(const LBSProblem&) = delete;

  ~LBSProblem() override;

  /// Returns a reference to the solver options.
  LBSOptions& GetOptions();

  /// Returns a constant reference to the solver options.
  const LBSOptions& GetOptions() const;

  void SetOptions(const InputParameters& input);

  void SetBoundaryOptions(const InputParameters& params);

  void SetAdjoint(bool adjoint);

  /// Returns the number of moments for the solver. This will only be non-zero after initialization.
  size_t GetNumMoments() const;

  /// Returns the number of groups for the solver. This will only be non-zero after initialization.
  size_t GetNumGroups() const;

  /// Returns the scattering order for the solver. This will only be non-zero after initialization.
  unsigned int GetScatteringOrder() const;

  /**
   * Returns the number of precursors for the solver. This will only be non-zero after
   * initialization.
   */
  size_t GetNumPrecursors() const;

  /**
   * Returns the maximum number of precursors defined on any material. This will only be non-zero
   * after initialization.
   */
  size_t GetMaxPrecursorsPerMaterial() const;

  const std::vector<LBSGroup>& GetGroups() const;

  std::vector<LBSGroupset>& GetGroupsets();

  const std::vector<LBSGroupset>& GetGroupsets() const;

  /// Adds a point source to the solver.
  void AddPointSource(std::shared_ptr<PointSource> point_source);

  /// Clears all the point sources from the solver.
  void ClearPointSources();

  /// Constant accessor to the list of point sources.
  const std::vector<std::shared_ptr<PointSource>>& GetPointSources() const;

  /// Adds a volumetric source to the solver.
  void AddVolumetricSource(std::shared_ptr<VolumetricSource> volumetric_source);

  /// Clears all the volumetric sources from the solver.
  void ClearVolumetricSources();

  /// Constant accessor to the list of volumetric sources.
  const std::vector<std::shared_ptr<VolumetricSource>>& GetVolumetricSources() const;

  /// Clears all the boundary conditions from the solver.
  void ClearBoundaries();

  size_t& GetLastRestartTime();

  /// Returns a reference to the map of material ids to XSs.
  const std::map<int, std::shared_ptr<MultiGroupXS>>& GetMatID2XSMap() const;

  /// Obtains a reference to the grid.
  std::shared_ptr<MeshContinuum> GetGrid() const;

  /// Get pointer to carriers.
  void* GetCarrier(std::uint32_t idx) { return carriers_.at(idx); }

  /// Get pointer to pinners.
  void* GetPinner(std::uint32_t idx) { return pinners_.at(idx); }

  /// Obtains a reference to the spatial discretization.
  const SpatialDiscretization& GetSpatialDiscretization() const;

  /// Returns read-only access to the unit cell matrices.
  const std::vector<UnitCellMatrices>& GetUnitCellMatrices() const;

  /// Returns read-only access to the unit ghost cell matrices.
  const std::map<uint64_t, UnitCellMatrices>& GetUnitGhostCellMatrices() const;

  /// Returns a reference to the list of local cell transport views.
  const std::vector<CellLBSView>& GetCellTransportViews() const;

  /// Read/Write access to the boundary preferences.
  std::map<uint64_t, BoundaryPreference>& GetBoundaryPreferences();

  /// Obtains a reference to the unknown manager for flux-moments.
  const UnknownManager& GetUnknownManager() const;

  /// Returns the local node count for the flux-moments data structures.
  size_t GetLocalNodeCount() const;

  /// Returns the global node count for the flux-moments data structures.
  size_t GetGlobalNodeCount() const;

  /// Read/write access to source moments vector.
  std::vector<double>& GetQMomentsLocal();

  /// Read access to source moments vector.
  const std::vector<double>& GetQMomentsLocal() const;

  /// Read/write access to exterior src moments vector.
  std::vector<double>& GetExtSrcMomentsLocal();

  /// Read access to exterior src moments vector.
  const std::vector<double>& GetExtSrcMomentsLocal() const;

  /// Read/write access to last updated flux vector.
  std::vector<double>& GetPhiOldLocal();

  /// Read access to last updated flux vector.
  const std::vector<double>& GetPhiOldLocal() const;

  /// Read/write access to newest updated flux vector.
  std::vector<double>& GetPhiNewLocal();

  /// Read access to newest updated flux vector.
  const std::vector<double>& GetPhiNewLocal() const;

  /// Read/write access to newest updated precursors vector.
  std::vector<double>& GetPrecursorsNewLocal();

  /// Read access to newest updated precursors vector.
  const std::vector<double>& GetPrecursorsNewLocal() const;

  /// Read/write access to the cell-wise densities.
  std::vector<double>& GetDensitiesLocal();

  /// Read access to the cell-wise densities.
  const std::vector<double>& GetDensitiesLocal() const;

  SetSourceFunction GetActiveSetSourceFunction() const;

  std::shared_ptr<AGSLinearSolver> GetAGSSolver();

  std::vector<std::shared_ptr<LinearSolver>>& GetWGSSolvers();

  WGSContext& GetWGSContext(int groupset_id);

  /**
   * Gets the local and global number of iterative unknowns. This normally is only the flux moments,
   * however, the sweep based solvers might include delayed angular fluxes in this number.
   */
  virtual std::pair<size_t, size_t> GetNumPhiIterativeUnknowns();

  /// Gets the local handle of a flux-moment based field function.
  size_t MapPhiFieldFunction(size_t g, size_t m) const;

  /// Returns the power generation field function, if enabled.
  std::shared_ptr<FieldFunctionGridBased> GetPowerFieldFunction() const;

  void Initialize() override;

  bool TriggerRestartDump() const
  {
    if (options_.write_restart_time_interval <= std::chrono::seconds(0))
      return false;

    auto elapsed = std::chrono::system_clock::now() - options_.last_restart_write_time;
    return elapsed >= options_.write_restart_time_interval;
  }

  void UpdateRestartWriteTime()
  {
    options_.last_restart_write_time = std::chrono::system_clock::now();
  }

  /// Makes a source-moments vector from scattering and fission based on the latest phi-solution.
  std::vector<double> MakeSourceMomentsFromPhi();

  /// Copy relevant section of phi_old to the field functions.
  void UpdateFieldFunctions();

  /// Sets the internal phi vector to the value in the associated field function.
  void SetPhiFromFieldFunctions(PhiSTLOption which_phi,
                                const std::vector<size_t>& m_indices,
                                const std::vector<size_t>& g_indices);

  /**
   * A method for post-processing an adjoint solution.
   *
   * @note This does nothing for diffusion-based solvers.
   */
  virtual void ReorientAdjointSolution() {};

private:
  /// Initialize groupsets
  void InitializeGroupsets(const InputParameters& params);

  /// Initializes materials
  void InitializeXSmapAndDensities(const InputParameters& params);
  void InitializeMaterials();

  /// Initialize sources
  void InitializeSources(const InputParameters& params);

  /// Initialize boundary conditions
  void InitializeBoundaryConditions(const InputParameters& params);

protected:
  virtual void PrintSimHeader();

  void ComputeUnitIntegrals();

  virtual void InitializeSpatialDiscretization();

  /// Initializes parallel arrays.
  void InitializeParrays();

  void InitializeFieldFunctions();

  /// Initializes boundaries.
  virtual void InitializeBoundaries() {}

  void InitializeSolverSchemes();

  virtual void InitializeWGSSolvers() {};

  /// Initializes data carriers to GPUs and memory pinner.
  void InitializeGPUExtras();

  /// Reset data carriers to null and unpin memory.
  void ResetGPUCarriers();

  virtual void ZeroSolutions() = 0;

  LBSOptions options_;
  size_t num_moments_ = 0;
  size_t num_groups_ = 0;
  unsigned int scattering_order_ = 0;
  size_t num_precursors_ = 0;
  size_t max_precursors_per_material_ = 0;

  std::vector<LBSGroup> groups_;
  std::vector<LBSGroupset> groupsets_;

  std::map<int, std::shared_ptr<MultiGroupXS>> block_id_to_xs_map_;

  std::vector<std::shared_ptr<PointSource>> point_sources_;
  std::vector<std::shared_ptr<VolumetricSource>> volumetric_sources_;

  std::shared_ptr<MeshContinuum> grid_;
  std::shared_ptr<SpatialDiscretization> discretization_ = nullptr;

  std::vector<CellFaceNodalMapping> grid_nodal_mappings_;
  std::shared_ptr<MPICommunicatorSet> grid_local_comm_set_ = nullptr;

  std::vector<UnitCellMatrices> unit_cell_matrices_;
  std::map<uint64_t, UnitCellMatrices> unit_ghost_cell_matrices_;
  std::vector<CellLBSView> cell_transport_views_;

  std::map<uint64_t, BoundaryPreference> boundary_preferences_;

  UnknownManager flux_moments_uk_man_;

  size_t max_cell_dof_count_ = 0;
  size_t min_cell_dof_count_ = 0;
  uint64_t local_node_count_ = 0;
  uint64_t global_node_count_ = 0;

  std::vector<double> q_moments_local_, ext_src_moments_local_;
  std::vector<double> phi_new_local_, phi_old_local_;
  std::vector<double> precursor_new_local_;
  std::vector<double> densities_local_;

  SetSourceFunction active_set_source_function_;

  std::shared_ptr<AGSLinearSolver> ags_solver_;
  std::vector<std::shared_ptr<LinearSolver>> wgs_solvers_;

  std::map<std::pair<size_t, size_t>, size_t> phi_field_functions_local_map_;
  size_t power_gen_fieldfunc_local_handle_ = 0;

  /// Time integration parameter meant to be set by an executor
  std::shared_ptr<const TimeIntegration> time_integration_ = nullptr;

  /**
   * @brief Data carriers for necessary data to run the sweep on GPU.
   * @details These objects manage GPU memory allocation automatically, organize cross-section,
   * outflow, and mesh data into contiguous memory on the CPU, and handle copying it to the GPU.
   *
   * There are 3 carriers, respectively for cross sections, outflow and mesh.
   */
  std::array<void*, 3> carriers_ = {nullptr, nullptr, nullptr};

  /// Memory pinner for source moments and destination phi.
  std::array<void*, 2> pinners_ = {nullptr, nullptr};

  /// Flag indicating if GPU acceleration is enabled.
  bool use_gpus_;

  /// Checks if the current CPU is associated with any GPU.
  static void CheckCapableDevices();

public:
  static std::map<std::string, uint64_t> supported_boundary_names;
  static std::map<uint64_t, std::string> supported_boundary_ids;

  /// Returns the input parameters for this object.
  static InputParameters GetInputParameters();

  static InputParameters GetOptionsBlock();

  static InputParameters GetBoundaryOptionsBlock();

  static InputParameters GetXSMapEntryBlock();
};

} // namespace opensn

1	// SPDX-FileCopyrightText: 2024 The OpenSn Authors <https://open-sn.github.io/opensn/>
2	// SPDX-License-Identifier: MIT
3
4	#pragma once
5
6	#include "modules/problem.h"
7	#include "modules/linear_boltzmann_solvers/discrete_ordinates_problem/sweep/sweep.h"
8	#include "modules/linear_boltzmann_solvers/lbs_problem/groupset/lbs_groupset.h"
9	#include "modules/linear_boltzmann_solvers/lbs_problem/point_source/point_source.h"
10	#include "modules/linear_boltzmann_solvers/lbs_problem/volumetric_source/volumetric_source.h"
11	#include "modules/linear_boltzmann_solvers/lbs_problem/lbs_structs.h"
12	#include "framework/math/spatial_discretization/spatial_discretization.h"
13	#include "framework/mesh/mesh_continuum/mesh_continuum.h"
14	#include "framework/math/linear_solver/linear_solver.h"
15	#include "framework/math/spatial_discretization/finite_element/unit_cell_matrices.h"
16	#include <petscksp.h>
17	#include <any>
18	#include <chrono>
19
20	namespace opensn
21	{
22
23	class MPICommunicatorSet;
24	class GridFaceHistogram;
25	class TimeIntegration;
26	class AGSLinearSolver;
27	class WGSLinearSolver;
28	struct WGSContext;
29
30	/// Base class for all Linear Boltzmann Solvers.
31	class LBSProblem : public Problem
32	{
33	public:
34	explicit LBSProblem(const std::string& name, std::shared_ptr<MeshContinuum> grid);
35
36	/// Input parameters based construction.
37	explicit LBSProblem(const InputParameters& params);
38
39	LBSProblem(const LBSProblem&) = delete;
40
41	LBSProblem& operator=(const LBSProblem&) = delete;
42
43	~LBSProblem() override;
44
45	/// Returns a reference to the solver options.
46	LBSOptions& GetOptions();
47
48	/// Returns a constant reference to the solver options.
49	const LBSOptions& GetOptions() const;
50
51	void SetOptions(const InputParameters& input);
52
53	void SetBoundaryOptions(const InputParameters& params);
54
55	void SetAdjoint(bool adjoint);
56
57	/// Returns the number of moments for the solver. This will only be non-zero after initialization.
58	size_t GetNumMoments() const;
59
60	/// Returns the number of groups for the solver. This will only be non-zero after initialization.
61	size_t GetNumGroups() const;
62
63	/// Returns the scattering order for the solver. This will only be non-zero after initialization.
64	unsigned int GetScatteringOrder() const;
65
66	/**
67	* Returns the number of precursors for the solver. This will only be non-zero after
68	* initialization.
69	*/
70	size_t GetNumPrecursors() const;
71
72	/**
73	* Returns the maximum number of precursors defined on any material. This will only be non-zero
74	* after initialization.
75	*/
76	size_t GetMaxPrecursorsPerMaterial() const;
77
78	const std::vector<LBSGroup>& GetGroups() const;
79
80	std::vector<LBSGroupset>& GetGroupsets();
81
82	const std::vector<LBSGroupset>& GetGroupsets() const;
83
84	/// Adds a point source to the solver.
85	void AddPointSource(std::shared_ptr<PointSource> point_source);
86
87	/// Clears all the point sources from the solver.
88	void ClearPointSources();
89
90	/// Constant accessor to the list of point sources.
91	const std::vector<std::shared_ptr<PointSource>>& GetPointSources() const;
92
93	/// Adds a volumetric source to the solver.
94	void AddVolumetricSource(std::shared_ptr<VolumetricSource> volumetric_source);
95
96	/// Clears all the volumetric sources from the solver.
97	void ClearVolumetricSources();
98
99	/// Constant accessor to the list of volumetric sources.
100	const std::vector<std::shared_ptr<VolumetricSource>>& GetVolumetricSources() const;
101
102	/// Clears all the boundary conditions from the solver.
103	void ClearBoundaries();
104
105	size_t& GetLastRestartTime();
106
107	/// Returns a reference to the map of material ids to XSs.
108	const std::map<int, std::shared_ptr<MultiGroupXS>>& GetMatID2XSMap() const;
109
110	/// Obtains a reference to the grid.
111	std::shared_ptr<MeshContinuum> GetGrid() const;
112
113	/// Get pointer to carriers.
114	void* GetCarrier(std::uint32_t idx) { return carriers_.at(idx); }
115
116	/// Get pointer to pinners.
117	void* GetPinner(std::uint32_t idx) { return pinners_.at(idx); }
118
119	/// Obtains a reference to the spatial discretization.
120	const SpatialDiscretization& GetSpatialDiscretization() const;
121
122	/// Returns read-only access to the unit cell matrices.
123	const std::vector<UnitCellMatrices>& GetUnitCellMatrices() const;
124
125	/// Returns read-only access to the unit ghost cell matrices.
126	const std::map<uint64_t, UnitCellMatrices>& GetUnitGhostCellMatrices() const;
127
128	/// Returns a reference to the list of local cell transport views.
129	const std::vector<CellLBSView>& GetCellTransportViews() const;
130
131	/// Read/Write access to the boundary preferences.
132	std::map<uint64_t, BoundaryPreference>& GetBoundaryPreferences();
133
134	/// Obtains a reference to the unknown manager for flux-moments.
135	const UnknownManager& GetUnknownManager() const;
136
137	/// Returns the local node count for the flux-moments data structures.
138	size_t GetLocalNodeCount() const;
139
140	/// Returns the global node count for the flux-moments data structures.
141	size_t GetGlobalNodeCount() const;
142
143	/// Read/write access to source moments vector.
144	std::vector<double>& GetQMomentsLocal();
145
146	/// Read access to source moments vector.
147	const std::vector<double>& GetQMomentsLocal() const;
148
149	/// Read/write access to exterior src moments vector.
150	std::vector<double>& GetExtSrcMomentsLocal();
151
152	/// Read access to exterior src moments vector.
153	const std::vector<double>& GetExtSrcMomentsLocal() const;
154
155	/// Read/write access to last updated flux vector.
156	std::vector<double>& GetPhiOldLocal();
157
158	/// Read access to last updated flux vector.
159	const std::vector<double>& GetPhiOldLocal() const;
160
161	/// Read/write access to newest updated flux vector.
162	std::vector<double>& GetPhiNewLocal();
163
164	/// Read access to newest updated flux vector.
165	const std::vector<double>& GetPhiNewLocal() const;
166
167	/// Read/write access to newest updated precursors vector.
168	std::vector<double>& GetPrecursorsNewLocal();
169
170	/// Read access to newest updated precursors vector.
171	const std::vector<double>& GetPrecursorsNewLocal() const;
172
173	/// Read/write access to the cell-wise densities.
174	std::vector<double>& GetDensitiesLocal();
175
176	/// Read access to the cell-wise densities.
177	const std::vector<double>& GetDensitiesLocal() const;
178
179	SetSourceFunction GetActiveSetSourceFunction() const;
180
181	std::shared_ptr<AGSLinearSolver> GetAGSSolver();
182
183	std::vector<std::shared_ptr<LinearSolver>>& GetWGSSolvers();
184
185	WGSContext& GetWGSContext(int groupset_id);
186
187	/**
188	* Gets the local and global number of iterative unknowns. This normally is only the flux moments,
189	* however, the sweep based solvers might include delayed angular fluxes in this number.
190	*/
191	virtual std::pair<size_t, size_t> GetNumPhiIterativeUnknowns();
192
193	/// Gets the local handle of a flux-moment based field function.
194	size_t MapPhiFieldFunction(size_t g, size_t m) const;
195
196	/// Returns the power generation field function, if enabled.
197	std::shared_ptr<FieldFunctionGridBased> GetPowerFieldFunction() const;
198
199	void Initialize() override;
200
UNCOV 201	bool TriggerRestartDump() const	×
202	{
203	if (options_.write_restart_time_interval <= std::chrono::seconds(0))	×
204	return false;
205
206	auto elapsed = std::chrono::system_clock::now() - options_.last_restart_write_time;	×
207	return elapsed >= options_.write_restart_time_interval;	×
208	}
209
210	void UpdateRestartWriteTime()	×
211	{
212	options_.last_restart_write_time = std::chrono::system_clock::now();	×
213	}
214
215	/// Makes a source-moments vector from scattering and fission based on the latest phi-solution.
216	std::vector<double> MakeSourceMomentsFromPhi();
217
218	/// Copy relevant section of phi_old to the field functions.
219	void UpdateFieldFunctions();
220
221	/// Sets the internal phi vector to the value in the associated field function.
222	void SetPhiFromFieldFunctions(PhiSTLOption which_phi,
223	const std::vector<size_t>& m_indices,
224	const std::vector<size_t>& g_indices);
225
226	/**
227	* A method for post-processing an adjoint solution.
228	*
229	* @note This does nothing for diffusion-based solvers.
230	*/
231	virtual void ReorientAdjointSolution() {};	×
232
233	private:
234	/// Initialize groupsets
235	void InitializeGroupsets(const InputParameters& params);
236
237	/// Initializes materials
238	void InitializeXSmapAndDensities(const InputParameters& params);
239	void InitializeMaterials();
240
241	/// Initialize sources
242	void InitializeSources(const InputParameters& params);
243
244	/// Initialize boundary conditions
245	void InitializeBoundaryConditions(const InputParameters& params);
246
247	protected:
248	virtual void PrintSimHeader();
249
250	void ComputeUnitIntegrals();
251
252	virtual void InitializeSpatialDiscretization();
253
254	/// Initializes parallel arrays.
255	void InitializeParrays();
256
257	void InitializeFieldFunctions();
258
259	/// Initializes boundaries.
260	virtual void InitializeBoundaries() {}	×
261
262	void InitializeSolverSchemes();
263
264	virtual void InitializeWGSSolvers() {};	×
265
266	/// Initializes data carriers to GPUs and memory pinner.
267	void InitializeGPUExtras();
268
269	/// Reset data carriers to null and unpin memory.
270	void ResetGPUCarriers();
271
272	virtual void ZeroSolutions() = 0;
273
274	LBSOptions options_;
275	size_t num_moments_ = 0;
276	size_t num_groups_ = 0;
277	unsigned int scattering_order_ = 0;
278	size_t num_precursors_ = 0;
279	size_t max_precursors_per_material_ = 0;
280
281	std::vector<LBSGroup> groups_;
282	std::vector<LBSGroupset> groupsets_;
283
284	std::map<int, std::shared_ptr<MultiGroupXS>> block_id_to_xs_map_;
285
286	std::vector<std::shared_ptr<PointSource>> point_sources_;
287	std::vector<std::shared_ptr<VolumetricSource>> volumetric_sources_;
288
289	std::shared_ptr<MeshContinuum> grid_;
290	std::shared_ptr<SpatialDiscretization> discretization_ = nullptr;
291
292	std::vector<CellFaceNodalMapping> grid_nodal_mappings_;
293	std::shared_ptr<MPICommunicatorSet> grid_local_comm_set_ = nullptr;
294
295	std::vector<UnitCellMatrices> unit_cell_matrices_;
296	std::map<uint64_t, UnitCellMatrices> unit_ghost_cell_matrices_;
297	std::vector<CellLBSView> cell_transport_views_;
298
299	std::map<uint64_t, BoundaryPreference> boundary_preferences_;
300
301	UnknownManager flux_moments_uk_man_;
302
303	size_t max_cell_dof_count_ = 0;
304	size_t min_cell_dof_count_ = 0;
305	uint64_t local_node_count_ = 0;
306	uint64_t global_node_count_ = 0;
307
308	std::vector<double> q_moments_local_, ext_src_moments_local_;
309	std::vector<double> phi_new_local_, phi_old_local_;
310	std::vector<double> precursor_new_local_;
311	std::vector<double> densities_local_;
312
313	SetSourceFunction active_set_source_function_;
314
315	std::shared_ptr<AGSLinearSolver> ags_solver_;
316	std::vector<std::shared_ptr<LinearSolver>> wgs_solvers_;
317
318	std::map<std::pair<size_t, size_t>, size_t> phi_field_functions_local_map_;
319	size_t power_gen_fieldfunc_local_handle_ = 0;
320
321	/// Time integration parameter meant to be set by an executor
322	std::shared_ptr<const TimeIntegration> time_integration_ = nullptr;
323
324	/**
325	* @brief Data carriers for necessary data to run the sweep on GPU.
326	* @details These objects manage GPU memory allocation automatically, organize cross-section,
327	* outflow, and mesh data into contiguous memory on the CPU, and handle copying it to the GPU.
328	*
329	* There are 3 carriers, respectively for cross sections, outflow and mesh.
330	*/
331	std::array<void*, 3> carriers_ = {nullptr, nullptr, nullptr};
332
333	/// Memory pinner for source moments and destination phi.
334	std::array<void*, 2> pinners_ = {nullptr, nullptr};
335
336	/// Flag indicating if GPU acceleration is enabled.
337	bool use_gpus_;
338
339	/// Checks if the current CPU is associated with any GPU.
340	static void CheckCapableDevices();
341
342	public:
343	static std::map<std::string, uint64_t> supported_boundary_names;
344	static std::map<uint64_t, std::string> supported_boundary_ids;
345
346	/// Returns the input parameters for this object.
347	static InputParameters GetInputParameters();
348
349	static InputParameters GetOptionsBlock();
350
351	static InputParameters GetBoundaryOptionsBlock();
352
353	static InputParameters GetXSMapEntryBlock();
354	};
355
356	} // namespace opensn

Open-Sn / opensn / 18581001536

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