/*
 * Copyright (c) 2019, NVIDIA CORPORATION. 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.
 */
#include "kernel.h"
template <typename KeyT, typename ValueT>
size_t cubSortPairsWorkspaceSize(int num_items, int num_segments) {
  size_t temp_storage_bytes = 0;
  cub::DeviceSegmentedRadixSort::SortPairsDescending(
      (void*)NULL, temp_storage_bytes, (const KeyT*)NULL, (KeyT*)NULL,
      (const ValueT*)NULL, (ValueT*)NULL,
      num_items,     // # items
      num_segments,  // # segments
      (const int*)NULL, (const int*)NULL);
  return temp_storage_bytes;
}