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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// =======================================================================================================
// Defines the surface area between md\WinMD and md\everything-else.
//
// md\WinMD contains adapter importers that wrap RegMeta and MDInternalRO to make .winmd files look like
// regular .NET assemblies.
// =======================================================================================================
#ifndef __WINMDINTERFACES_H__
#define __WINMDINTERFACES_H__
#include "metamodel.h"
//-----------------------------------------------------------------------------------------------------
// A common interface unifying RegMeta and MDInternalRO, giving the adapter a common interface to
// access the raw metadata.
//-----------------------------------------------------------------------------------------------------
// {4F8EE8A3-24F8-4241-BC75-C8CAEC0255B5}
EXTERN_GUID(IID_IMDCommon, 0x4f8ee8a3, 0x24f8, 0x4241, 0xbc, 0x75, 0xc8, 0xca, 0xec, 0x2, 0x55, 0xb5);
#undef INTERFACE
#define INTERFACE IID_IMDCommon
DECLARE_INTERFACE_(IMDCommon, IUnknown)
{
STDMETHOD_(IMetaModelCommon*, GetMetaModelCommon)() PURE;
STDMETHOD_(IMetaModelCommonRO*, GetMetaModelCommonRO)() PURE;
STDMETHOD(GetVersionString)(LPCSTR *pszVersionString) PURE;
};
//-----------------------------------------------------------------------------------------------------
// Returns:
// S_OK: if WinMD adapter should be used.
// S_FALSE: if not
//-----------------------------------------------------------------------------------------------------
HRESULT CheckIfWinMDAdapterNeeded(IMDCommon *pRawMDCommon);
//-----------------------------------------------------------------------------------------------------
// Factory method that creates an WinMD adapter that implements:
//
// IMetaDataImport2
// IMetaDataAssemblyImport
// IMetaDataValidate
// IMarshal
// IMDCommon (subset)
//
// IMDCommon is included as a concession to the fact that certain IMetaDataEmit apis have
// an (apparently undocumented) dependency on their importer arguments supporting this.
//
// You must provide a regular MD importer that implements:
//
// IMDCommon
// IMetaDataImport2
// IMetaDataAssemblyImport
// IMetaDataValidate
//
// The underlying metadata file must follow these restrictions:
//
// - Have an existing assemblyRef to "mscorlib"
//
//-----------------------------------------------------------------------------------------------------
HRESULT CreateWinMDImport(IMDCommon * pRawMDCommon, REFIID riid, /*[out]*/ void **ppWinMDImport);
//-----------------------------------------------------------------------------------------------------
// Factory method that creates an WinMD adapter that implements IMDInternalImport.
// You must provide a regular MD importer that implements:
//
// IMDCommon
// IMDInternalImport
//
// The underlying metadata file must follow these restrictions:
//
// - Have an existing assemblyRef to "mscorlib"
//
//-----------------------------------------------------------------------------------------------------
#ifdef FEATURE_METADATA_INTERNAL_APIS
HRESULT CreateWinMDInternalImportRO(IMDCommon * pRawMDCommon, REFIID riid, /*[out]*/ void **ppWinMDInternalImport);
#endif // FEATURE_METADATA_INTERNAL_APIS
//-----------------------------------------------------------------------------------------------------
// S_OK if pUnknown is really a WinMD wrapper. This is just a polite way of asking "is it bad to
// to static cast pUnknown to RegMeta/MDInternalRO."
//-----------------------------------------------------------------------------------------------------
HRESULT CheckIfImportingWinMD(IUnknown *pUnknown);
//-----------------------------------------------------------------------------------------------------
// E_NOTIMPL if pUnknown is really a WinMD wrapper.
//-----------------------------------------------------------------------------------------------------
HRESULT VerifyNotWinMDHelper(IUnknown *pUnknown
#ifdef _DEBUG
,LPCSTR assertMsg
,LPCSTR file
,int line
#endif //_DEBUG
);
#if defined(FEATURE_METADATA_IN_VM) && !defined(FEATURE_CORECLR)
#ifdef _DEBUG
#define VerifyNotWinMD(pUnknown, assertMsg) VerifyNotWinMDHelper(pUnknown, assertMsg, __FILE__, __LINE__)
#else
#define VerifyNotWinMD(pUnknown, assertMsg) VerifyNotWinMDHelper(pUnknown)
#endif
#else
#define VerifyNotWinMD(pUnknown, assertMsg) S_OK
#endif // FEATURE_METADATA_IN_VM
#endif //__WINMDINTERFACES_H__
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