// Ceres Solver - A fast non-linear least squares minimizer
// Copyright 2024 Google Inc. All rights reserved.
// http://ceres-solver.org/
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// Author: markshachkov@gmail.com (Mark Shachkov)
//
// A C++ interface to cuDSS.

#ifndef CERES_INTERNAL_CUDA_SPARSE_CHOLESKY_H_
#define CERES_INTERNAL_CUDA_SPARSE_CHOLESKY_H_

// This include must come before any #ifndef check on Ceres compile options.
#include "ceres/internal/config.h"

#ifndef CERES_NO_CUDSS

#include <memory>

#include "ceres/internal/export.h"
#include "ceres/linear_solver.h"
#include "ceres/sparse_cholesky.h"

namespace ceres::internal {

// This class is a factory for implementation of sparse cholesky that uses cuDSS
// on CUDA capable GPU's to solve sparse linear systems. Scalar controls the
// precision used during computations, currently float and double are supported.
// Details of implementation are encapsulated into cuda_sparse_cholesky.cc
template <typename Scalar = double>
class CERES_NO_EXPORT CudaSparseCholesky : public SparseCholesky {
 public:
  static constexpr bool IsNestedDissectionAvailable() noexcept { return false; }

  static std::unique_ptr<SparseCholesky> Create(
      ContextImpl* context, const OrderingType ordering_type);
};

}  // namespace ceres::internal

#endif  // CERES_NO_CUDSS

#endif  // CERES_INTERNAL_CUDA_SPARSE_CHOLESKY_H_