/*
Copyright 2020 The OneFlow Authors. All rights reserved.

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.
*/
#ifndef ONEFLOW_USER_KERNELS_INDEXED_SLICES_REDUCE_SUM_KERNEL_UTIL_H_
#define ONEFLOW_USER_KERNELS_INDEXED_SLICES_REDUCE_SUM_KERNEL_UTIL_H_

#include "oneflow/core/kernel/kernel_util.h"
#include "oneflow/core/ep/include/stream.h"

namespace oneflow {

template<DeviceType device_type, typename K, typename T, typename IDX>
struct IndexedSlicesReduceSumKernelUtil {
  static void ReduceSum(ep::Stream* stream, int64_t n, int64_t m, const K* indices, const T* values,
                        IDX* num_unique_indices, K* indices_out, T* values_out, void* workspace,
                        int64_t workspace_size_in_bytes);
  static void GetReduceSumWorkspaceSizeInBytes(ep::Stream* stream, int64_t n, int64_t m,
                                               int64_t* workspace_size_in_bytes);
};

}  // namespace oneflow

#endif  // ONEFLOW_USER_KERNELS_INDEXED_SLICES_REDUCE_SUM_KERNEL_UTIL_H_
