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50 lines
2.2 KiB
C
50 lines
2.2 KiB
C
#pragma once
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/*
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******************************************************************************
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* This header is for easier generation of IUnknown interfaces for inherited *
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* classes and for casts from the interface to the implementation and vice *
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* versa. *
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******************************************************************************
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*/
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/* Generates a Iiface::AddRef() method that forwards to Iimpl::AddRef() */
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#define METHOD_IUNKNOWN_INHERITED_ADDREF_NAME(iface,impl) impl##Impl_##iface##_AddRef
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#define METHOD_IUNKNOWN_INHERITED_ADDREF(iface,impl) \
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static ULONG STDMETHODCALLTYPE \
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impl##Impl_##iface##_AddRef(IN OUT iface *ifc) { \
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impl##Impl *This = impl##Impl_from_##iface (ifc); \
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impl *baseiface = impl##_from_##impl##Impl(This); \
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return impl##Impl_AddRef(baseiface); \
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}
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/* Generates a Iiface::Release() method that forwards to Iimpl::Release() */
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#define METHOD_IUNKNOWN_INHERITED_RELEASE_NAME(iface,impl) impl##Impl_##iface##_Release
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#define METHOD_IUNKNOWN_INHERITED_RELEASE(iface,impl) \
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static ULONG STDMETHODCALLTYPE \
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impl##Impl_##iface##_Release(IN OUT iface *ifc) { \
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impl##Impl *This = impl##Impl_from_##iface (ifc); \
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impl *baseiface = impl##_from_##impl##Impl(This); \
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return impl##Impl_AddRef(baseiface); \
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}
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/* Generates a Iiface::QueryInterface() method that forwards to Iimpl::QueryInterface() */
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#define METHOD_IUNKNOWN_INHERITED_QUERYINTERFACE_NAME(iface,impl) impl##Impl_##iface##_QueryInterface
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#define METHOD_IUNKNOWN_INHERITED_QUERYINTERFACE(iface,impl) \
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static HRESULT STDMETHODCALLTYPE \
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impl##Impl_##iface##_QueryInterface(IN OUT iface *ifc, IN REFIID riid, OUT VOID **ppvObject) { \
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impl##Impl *This = impl##Impl_from_##iface (ifc); \
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impl *baseiface = impl##_from_##impl##Impl(This); \
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return impl##Impl_QueryInterface(baseiface, riid, ppvObject); \
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}
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/* Generates a Ixxx_from_IxxxImpl() and a IxxxImpl_from_Ixxx() inline function */
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#define IMPL_CASTS(iface,impl,vtbl) \
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static __inline iface * \
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iface##_from_##impl##Impl (impl##Impl *This) { \
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return (iface *)&This->vtbl; \
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} \
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static __inline impl##Impl * \
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impl##Impl_from_##iface (iface *ifc) { \
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return (impl##Impl *)((ULONG_PTR)ifc - FIELD_OFFSET(impl##Impl, vtbl)); \
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}
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