base/shell/explorer/comcsup.h

   1 #pragma once
   2
   3 /*
   4  ******************************************************************************
   5  * This header is for easier generation of IUnknown interfaces for inherited  *
   6  * classes and for casts from the interface to the implementation and vice    *
   7  * versa.                                                                     *
   8  ******************************************************************************
   9  */
  10
  11 /* Generates a Iiface::AddRef() method that forwards to Iimpl::AddRef() */
  12 #define METHOD_IUNKNOWN_INHERITED_ADDREF_NAME(iface,impl) impl##Impl_##iface##_AddRef
  13 #define METHOD_IUNKNOWN_INHERITED_ADDREF(iface,impl) \
  14 static ULONG STDMETHODCALLTYPE \
  15 impl##Impl_##iface##_AddRef(IN OUT iface *ifc) { \
  16     impl##Impl *This = impl##Impl_from_##iface (ifc); \
  17     impl *baseiface = impl##_from_##impl##Impl(This); \
  18     return impl##Impl_AddRef(baseiface); \
  19 }
  20
  21 /* Generates a Iiface::Release() method that forwards to Iimpl::Release() */
  22 #define METHOD_IUNKNOWN_INHERITED_RELEASE_NAME(iface,impl) impl##Impl_##iface##_Release
  23 #define METHOD_IUNKNOWN_INHERITED_RELEASE(iface,impl) \
  24 static ULONG STDMETHODCALLTYPE \
  25 impl##Impl_##iface##_Release(IN OUT iface *ifc) { \
  26     impl##Impl *This = impl##Impl_from_##iface (ifc); \
  27     impl *baseiface = impl##_from_##impl##Impl(This); \
  28     return impl##Impl_AddRef(baseiface); \
  29 }
  30
  31 /* Generates a Iiface::QueryInterface() method that forwards to Iimpl::QueryInterface() */
  32 #define METHOD_IUNKNOWN_INHERITED_QUERYINTERFACE_NAME(iface,impl) impl##Impl_##iface##_QueryInterface
  33 #define METHOD_IUNKNOWN_INHERITED_QUERYINTERFACE(iface,impl) \
  34 static HRESULT STDMETHODCALLTYPE \
  35 impl##Impl_##iface##_QueryInterface(IN OUT iface *ifc, IN REFIID riid, OUT VOID **ppvObject) { \
  36     impl##Impl *This = impl##Impl_from_##iface (ifc); \
  37     impl *baseiface = impl##_from_##impl##Impl(This); \
  38     return impl##Impl_QueryInterface(baseiface, riid, ppvObject); \
  39 }
  40
  41 /* Generates a Ixxx_from_IxxxImpl() and a IxxxImpl_from_Ixxx() inline function */
  42 #define IMPL_CASTS(iface,impl,vtbl) \
  43 static __inline iface * \
  44 iface##_from_##impl##Impl (impl##Impl *This) { \
  45     return (iface *)&This->vtbl; \
  46 } \
  47 static __inline impl##Impl * \
  48 impl##Impl_from_##iface (iface *ifc) { \
  49     return (impl##Impl *)((ULONG_PTR)ifc - FIELD_OFFSET(impl##Impl, vtbl)); \
  50 }