Sweden-Number/dlls/quartz/iunk.h

84 lines
2.3 KiB
C

/*
* An implementation of IUnknown.
*
* Copyright (C) Hidenori TAKESHIMA <hidenori@a2.ctktv.ne.jp>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef WINE_DSHOW_IUNK_H
#define WINE_DSHOW_IUNK_H
/*
To avoid implementing IUnknown for all interfaces,
1) To give a method to get rel-offset of IUnknown.
2) The IUnknown knows all IIDs and offsets of interfaces.
So each implementation must have following two members
with the following order:
typedef struct IDispatchImpl
{
ICOM_VFIELD(IDispatch); <-pointer of the interface.
size_t ofsIUnknown; <-ofs<IDispatchImpl> - ofs<QUARTZ_IUnkImpl>
};
*/
/* for InterlockedExchangeAdd. */
#include <pshpack4.h>
typedef struct QUARTZ_IFEntry
{
const IID* piid; /* interface ID. */
size_t ofsVTPtr; /* offset from IUnknown. */
} QUARTZ_IFEntry;
typedef struct QUARTZ_IFDelegation
{
struct QUARTZ_IFDelegation* pNext;
HRESULT (*pOnQueryInterface)(
IUnknown* punk, const IID* piid, void** ppobj );
} QUARTZ_IFDelegation;
typedef struct QUARTZ_IUnkImpl
{
/* pointer of IUnknown interface. */
ICOM_VFIELD(IUnknown);
/* array of supported IIDs and offsets. */
const QUARTZ_IFEntry* pEntries;
DWORD dwEntries;
/* list of delegation handlers. */
QUARTZ_IFDelegation* pDelegationFirst;
/* called on final release. */
void (*pOnFinalRelease)(IUnknown* punk);
/* IUnknown fields. */
LONG ref;
IUnknown* punkControl;
} QUARTZ_IUnkImpl;
#include <poppack.h>
void QUARTZ_IUnkInit( QUARTZ_IUnkImpl* pImpl, IUnknown* punkOuter );
void QUARTZ_IUnkAddDelegation(
QUARTZ_IUnkImpl* pImpl, QUARTZ_IFDelegation* pDelegation );
#endif /* WINE_DSHOW_IUNK_H */