text: /*     Copyright 2015-2019 Egor Yusov
   *  
   *  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
   * 
   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
   *
   *  In no event and under no legal theory, whether in tort (including negligence), 
   *  contract, or otherwise, unless required by applicable law (such as deliberate 
   *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
   *  liable for any damages, including any direct, indirect, special, incidental, 
   *  or consequential damages of any character arising as a result of this License or 
   *  out of the use or inability to use the software (including but not limited to damages 
   *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
   *  all other commercial damages or losses), even if such Contributor has been advised 
   *  of the possibility of such damages.
   */
  
  #pragma once
  
  /// \file
  /// Implementation of the Diligent::ObjectBase template class
  
  #include "../../Primitives/interface/Object.h"
  #include "RefCountedObjectImpl.h"
  
  namespace Diligent
  {
  
  
  #define IMPLEMENT_QUERY_INTERFACE_BODY(InterfaceID, ParentClassName) \
  {                                                               \
      if( ppInterface == nullptr )                                \
          return;                                                 \
      if( IID == InterfaceID )                                    \
      {                                                           \
          *ppInterface = this;                                    \
          (*ppInterface)->AddRef();                               \
      }                                                           \
      else                                                        \
      {                                                           \
          ParentClassName::QueryInterface( IID, ppInterface );    \
      }                                                           \
  }
  
  #define IMPLEMENT_QUERY_INTERFACE(ClassName, InterfaceID, ParentClassName) \
      void ClassName :: QueryInterface(const INTERFACE_ID& IID, IObject** ppInterface) \
      IMPLEMENT_QUERY_INTERFACE_BODY(InterfaceID, ParentClassName)
  
  #define IMPLEMENT_QUERY_INTERFACE_IN_PLACE(InterfaceID, ParentClassName) \
      virtual void QueryInterface(const INTERFACE_ID& IID, IObject** ppInterface)override \
      IMPLEMENT_QUERY_INTERFACE_BODY(InterfaceID, ParentClassName)
  
  
  /// Template class implementing base functionality for an object
  template<typename BaseInterface>
  class ObjectBase : public RefCountedObject<BaseInterface>
  {
  public:
      ObjectBase(IReferenceCounters* pRefCounters) : 
          RefCountedObject<BaseInterface>(pRefCounters)
      {}
  
      virtual void QueryInterface(const INTERFACE_ID& IID, IObject** ppInterface)
      {
          if (ppInterface == nullptr)
              return;
  
          *ppInterface = nullptr;
          if (IID == IID_Unknown)
          {
              *ppInterface = this;
              (*ppInterface)->AddRef();
          }
      }
  };
  
  }
  