repos_ecs/其他2015后/光盘刻录类/Nero 1.08SDK与例子/NeroSDK-1.08/NeroVisionAPI/Samples/NVAPIExample/BaseObj.h

/******************************************************************************
|* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
|* ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
|* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|* PARTICULAR PURPOSE.
|*
|* Copyright 1995-2005 Nero AG and its licensors. All Rights Reserved.
|*-----------------------------------------------------------------------------
|* NeroSDK / NeroVisionAPI
|*
|* PROGRAM: BaseObj.h
|*
|* PURPOSE: Test application for the NeroVision API: base class for COM objects
******************************************************************************/

#ifndef BASEOBJ_H
#define BASEOBJ_H

HRESULT GetInterface(LPUNKNOWN pUnk, void **ppv);

class BaseObj: public IUnknown
{
protected:
  BaseObj(): m_refCount(1) {}
  virtual ~BaseObj() {}

  STDMETHODIMP QueryInterface(REFIID riid, void** ppv)
  {
    if (riid == IID_IUnknown)
      return GetInterface(static_cast<IUnknown*>(this), ppv);
    else
      return InternalQueryInterface(riid, ppv);
  }
  STDMETHODIMP_(ULONG) AddRef() { return InterlockedIncrement((LONG*)&m_refCount); }
  STDMETHODIMP_(ULONG) Release() { ULONG r = InterlockedDecrement((LONG*)&m_refCount); if (r) return r; delete this; return 0; }

  virtual HRESULT InternalQueryInterface(REFIID riid, void** ppv) { return E_NOINTERFACE; }

  ULONG m_refCount;
};

#define IMPL_IUNKNOWN \
STDMETHODIMP QueryInterface(REFIID riid, void** ppv) { return BaseObj::QueryInterface(riid, ppv); } \
STDMETHODIMP_(ULONG) AddRef() { return BaseObj::AddRef(); } \
STDMETHODIMP_(ULONG) Release() { return BaseObj::Release(); }

#define IMPL_INTERFACE(IFNAME) \
HRESULT InternalQueryInterface(REFIID riid, void** ppv) \
{ \
  if (riid == __uuidof(IFNAME)) \
  return ::GetInterface(static_cast<IFNAME*>(this), ppv); \
  else \
    return BaseObj::InternalQueryInterface(riid, ppv); \
}


#endif