text: /**
   * Copyright 2019 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.
   */
  
  #include "backend/kernel_compiler/rts/assign.h"
  #include <memory>
  #include "runtime/mem.h"
  
  using mindspore::ge::model_runner::MemcpyAsyncTaskInfo;
  using MemcpyAsyncTaskInfoPtr = std::shared_ptr<MemcpyAsyncTaskInfo>;
  
  namespace mindspore {
  namespace kernel {
  AssignKernel::AssignKernel() {}
  
  AssignKernel::~AssignKernel() {}
  
  bool AssignKernel::Launch(const std::vector<AddressPtr> &inputs, const std::vector<AddressPtr> & /*workspace*/,
                            const std::vector<AddressPtr> & /*outputs*/, void *stream_ptr) {
    if (inputs.size() != 2) {
      MS_LOG(ERROR) << "inputs size is not two";
      return false;
    }
  
    if (inputs[0]->addr == inputs[1]->addr) {
      MS_LOG(INFO) << "first addr is same with second addr , no need assign";
      return true;
    }
    rtError_t status = rtMemcpyAsync(inputs[0]->addr, inputs[0]->size, inputs[1]->addr, inputs[1]->size,
                                     RT_MEMCPY_DEVICE_TO_DEVICE, stream_ptr);
    if (status != RT_ERROR_NONE) {
      MS_LOG(ERROR) << "Assign op rtMemcpyAsync failed!";
      return false;
    }
    return true;
  }
  
  std::vector<TaskInfoPtr> AssignKernel::GenTask(const std::vector<AddressPtr> &inputs,
                                                 const std::vector<AddressPtr> &workspace,
                                                 const std::vector<AddressPtr> &outputs, uint32_t stream_id) {
    if (inputs.size() != 2) {
      MS_LOG(EXCEPTION) << "inputs size is not two";
    }
    stream_id_ = stream_id;
  
    std::shared_ptr<MemcpyAsyncTaskInfo> task_info_ptr =
      std::make_shared<MemcpyAsyncTaskInfo>(kernel_name_, stream_id, inputs[0]->addr, inputs[0]->size, inputs[1]->addr,
                                            inputs[1]->size, RT_MEMCPY_DEVICE_TO_DEVICE, false);
    MS_EXCEPTION_IF_NULL(task_info_ptr);
    return {task_info_ptr};
  }
  }  // namespace kernel
  }  // namespace mindspore
  