text: /**
   * Copyright 2020 Huawei Technologies Co., Ltd
   *
   * 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 MINDSPORE_SERVING_BUFFER_TENSOR_H
  #define MINDSPORE_SERVING_BUFFER_TENSOR_H
  
  #include <vector>
  #include "common/serving_common.h"
  
  namespace mindspore::serving {
  
  class BufferTensor : public TensorBase {
   public:
    // the data's lifetime must longer than this object
    BufferTensor(DataType type, std::vector<int64_t> shape, uint8_t *data, size_t data_len, bool data_readonly);
    ~BufferTensor() = default;
  
    // For all data type
    std::vector<int64_t> shape() const override;
    void set_shape(const std::vector<int64_t> &shape) override;
    DataType data_type() const override;
    void set_data_type(DataType type) override;
  
    // All the following interfaces are not for kMSI_String and kMSI_Bytes
    const uint8_t *data() const override;
    size_t data_size() const override;
    bool resize_data(size_t data_len) override;
    uint8_t *mutable_data() override;
  
    // For kMSI_String and kMSI_Bytes
    void clear_bytes_data() override { MSI_LOG_EXCEPTION << "Buffer tensor cannot clear bytes data"; }
    void add_bytes_data(const uint8_t *data, size_t bytes_len) override {
      MSI_LOG_EXCEPTION << "Buffer tensor cannot add bytes data";
    }
  
    size_t bytes_data_size() const override;
    void get_bytes_data(size_t index, const uint8_t **data, size_t *bytes_len) const override;
  
   private:
    uint8_t *data_ = nullptr;
    size_t data_len_ = 0;
    std::vector<int64_t> shape_;
    DataType type_;
    bool data_readonly_ = false;
  };
  
  class BufferTensorWithOwner : public BufferTensor {
   public:
    BufferTensorWithOwner(TensorBasePtr buffer_tensor_owner, DataType type, std::vector<int64_t> shape, uint8_t *data,
                          size_t data_len, bool data_readonly)
        : BufferTensor(type, shape, data, data_len, data_readonly), buffer_tensor_owner_(buffer_tensor_owner) {}
    ~BufferTensorWithOwner() = default;
  
   private:
    TensorBasePtr buffer_tensor_owner_;
  };
  
  }  // namespace mindspore::serving
  
  #endif  // MINDSPORE_SERVING_BUFFER_TENSOR_H
  