new_delete_resource.hpp

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/*
 * Copyright (c) 2020-2021, 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 <rmm/mr/host/host_memory_resource.hpp>
 
#include <rmm/detail/aligned.hpp>
 
#include <cstddef>
#include <utility>
 
namespace rmm::mr {
class new_delete_resource final : public host_memory_resource {
 public:
  new_delete_resource()                           = default;
  ~new_delete_resource() override                 = default;
  new_delete_resource(new_delete_resource const&) = default;  
  new_delete_resource(new_delete_resource&&)      = default;  
  new_delete_resource& operator=(new_delete_resource const&) =
    default;  
  new_delete_resource& operator=(new_delete_resource&&) =
    default;  
 
 private:
  void* do_allocate(std::size_t bytes,
                    std::size_t alignment = rmm::detail::RMM_DEFAULT_HOST_ALIGNMENT) override
  {
    // If the requested alignment isn't supported, use default
    alignment = (rmm::detail::is_supported_alignment(alignment))
                  ? alignment
                  : rmm::detail::RMM_DEFAULT_HOST_ALIGNMENT;
 
    return rmm::detail::aligned_allocate(
      bytes, alignment, [](std::size_t size) { return ::operator new(size); });
  }
 
  void do_deallocate(void* ptr,
                     std::size_t bytes,
                     std::size_t alignment = rmm::detail::RMM_DEFAULT_HOST_ALIGNMENT) override
  {
    rmm::detail::aligned_deallocate(
      ptr, bytes, alignment, [](void* ptr) { ::operator delete(ptr); });
  }
};
  // end of group
}  // namespace rmm::mr