text: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.
   */
  /*
   * \file src/runtime/object_internal.h
   * \brief Expose a few functions for CFFI purposes.
   *        This file is not intended to be used
   */
  #ifndef TVM_RUNTIME_OBJECT_INTERNAL_H_
  #define TVM_RUNTIME_OBJECT_INTERNAL_H_
  
  #include <tvm/runtime/module.h>
  #include <tvm/runtime/object.h>
  
  #include <string>
  
  namespace tvm {
  namespace runtime {
  
  /*!
   * \brief Internal object namespace to expose
   *        certain util functions for FFI.
   */
  class ObjectInternal {
   public:
    /*!
     * \brief Free an object handle.
     */
    static void ObjectFree(TVMObjectHandle obj) {
      if (obj != nullptr) {
        static_cast<Object*>(obj)->DecRef();
      }
    }
    /*!
     * \brief Check of obj derives from the type indicated by type index.
     * \param obj The original object.
     * \param type_index The type index of interest.
     * \return The derivation checking result.
     */
    static bool DerivedFrom(const Object* obj, uint32_t type_index) {
      return obj->DerivedFrom(type_index);
    }
    /*!
     * \brief Expose TypeKey2Index
     * \param type_key The original type key.
     * \return the corresponding index.
     */
    static uint32_t ObjectTypeKey2Index(const std::string& type_key) {
      return Object::TypeKey2Index(type_key);
    }
    /*!
     * \brief Convert ModuleHandle to module node pointer.
     * \param handle The module handle.
     * \return the corresponding module node pointer.
     */
    static ModuleNode* GetModuleNode(TVMModuleHandle handle) {
      // NOTE: we will need to convert to Object
      // then to ModuleNode in order to get the correct
      // address translation
      return static_cast<ModuleNode*>(static_cast<Object*>(handle));
    }
  };
  
  }  // namespace runtime
  }  // namespace tvm
  #endif  // TVM_RUNTIME_OBJECT_INTERNAL_H_
  