tree_shap.hpp

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/*
 * Copyright (c) 2021-2022, NVIDIA CORPORATION.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#pragma once
 
#include <cstddef>
#include <cstdint>
#include <cuml/ensemble/treelite_defs.hpp>
#include <memory>
#include <variant>
 
namespace ML {
namespace Explainer {
 
template <typename T>
class TreePathInfo;
 
using TreePathHandle =
  std::variant<std::shared_ptr<TreePathInfo<float>>, std::shared_ptr<TreePathInfo<double>>>;
 
using FloatPointer = std::variant<float*, double*>;
 
TreePathHandle extract_path_info(ModelHandle model);
 
void gpu_treeshap(TreePathHandle path_info,
                  const FloatPointer data,
                  std::size_t n_rows,
                  std::size_t n_cols,
                  FloatPointer out_preds,
                  std::size_t out_preds_size);
 
void gpu_treeshap_interventional(TreePathHandle path_info,
                                 const FloatPointer data,
                                 std::size_t n_rows,
                                 std::size_t n_cols,
                                 const FloatPointer background_data,
                                 std::size_t background_n_rows,
                                 std::size_t background_n_cols,
                                 FloatPointer out_preds,
                                 std::size_t out_preds_size);
 
void gpu_treeshap_interactions(TreePathHandle path_info,
                               const FloatPointer data,
                               std::size_t n_rows,
                               std::size_t n_cols,
                               FloatPointer out_preds,
                               std::size_t out_preds_size);
 
void gpu_treeshap_taylor_interactions(TreePathHandle path_info,
                                      const FloatPointer data,
                                      std::size_t n_rows,
                                      std::size_t n_cols,
                                      FloatPointer out_preds,
                                      std::size_t out_preds_size);
 
}  // namespace Explainer
}  // namespace ML