data_chunk_source.hpp

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/*
 * SPDX-FileCopyrightText: Copyright (c) 2021-2024, NVIDIA CORPORATION.
 * SPDX-License-Identifier: Apache-2.0
 */
 
#pragma once
 
#include <cudf/utilities/export.hpp>
#include <cudf/utilities/span.hpp>
 
#include <rmm/cuda_stream_pool.hpp>
#include <rmm/device_buffer.hpp>
 
namespace CUDF_EXPORT cudf {
namespace io {
namespace text {
 
class device_data_chunk {
 public:
  virtual ~device_data_chunk() = default;
  [[nodiscard]] virtual char const* data() const = 0;
  [[nodiscard]] virtual std::size_t size() const = 0;
  virtual operator device_span<char const>() const = 0;
};
 
class data_chunk_reader {
 public:
  virtual ~data_chunk_reader() = default;
  virtual void skip_bytes(std::size_t size) = 0;
 
  virtual std::unique_ptr<device_data_chunk> get_next_chunk(std::size_t size,
                                                            rmm::cuda_stream_view stream) = 0;
};
 
class data_chunk_source {
 public:
  virtual ~data_chunk_source() = default;
 
  [[nodiscard]] virtual std::unique_ptr<data_chunk_reader> create_reader() const = 0;
};
  // end of group
 
}  // namespace text
}  // namespace io
}  // namespace CUDF_EXPORT cudf