160 lines
3.5 KiB
C
160 lines
3.5 KiB
C
/*
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* An implementation of IUnknown.
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*
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* Copyright (C) Hidenori TAKESHIMA <hidenori@a2.ctktv.ne.jp>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "windef.h"
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#include "winerror.h"
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#include "winbase.h"
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#include "wine/obj_base.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(quartz);
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#include "quartz_private.h"
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#include "iunk.h"
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static HRESULT WINAPI
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IUnknown_fnQueryInterface(IUnknown* iface,REFIID riid,LPVOID *ppobj)
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{
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ICOM_THIS(QUARTZ_IUnkImpl,iface);
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size_t ofs;
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DWORD dwIndex;
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QUARTZ_IFDelegation* pDelegation;
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HRESULT hr;
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TRACE("(%p)->(%s,%p)\n",This,debugstr_guid(riid),ppobj);
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if ( ppobj == NULL )
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return E_POINTER;
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*ppobj = NULL;
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ofs = 0;
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if ( IsEqualGUID( &IID_IUnknown, riid ) )
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{
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TRACE("IID_IUnknown - returns inner object.\n");
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}
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else
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{
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for ( dwIndex = 0; dwIndex < This->dwEntries; dwIndex++ )
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{
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if ( IsEqualGUID( This->pEntries[dwIndex].piid, riid ) )
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{
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ofs = This->pEntries[dwIndex].ofsVTPtr;
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break;
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}
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}
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if ( dwIndex == This->dwEntries )
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{
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hr = E_NOINTERFACE;
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/* delegation */
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pDelegation = This->pDelegationFirst;
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while ( pDelegation != NULL )
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{
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hr = (*pDelegation->pOnQueryInterface)( iface, riid, ppobj );
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if ( hr != E_NOINTERFACE )
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break;
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pDelegation = pDelegation->pNext;
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}
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if ( hr == E_NOINTERFACE )
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{
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WARN("(%p) unknown interface: %s\n",This,debugstr_guid(riid));
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}
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return hr;
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}
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}
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*ppobj = (LPVOID)(((char*)This) + ofs);
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IUnknown_AddRef((IUnknown*)(*ppobj));
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return S_OK;
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}
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static ULONG WINAPI
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IUnknown_fnAddRef(IUnknown* iface)
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{
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ICOM_THIS(QUARTZ_IUnkImpl,iface);
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TRACE("(%p)->()\n",This);
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return InterlockedExchangeAdd(&(This->ref),1) + 1;
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}
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static ULONG WINAPI
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IUnknown_fnRelease(IUnknown* iface)
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{
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ICOM_THIS(QUARTZ_IUnkImpl,iface);
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LONG ref;
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TRACE("(%p)->()\n",This);
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ref = InterlockedExchangeAdd(&(This->ref),-1) - 1;
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if ( ref > 0 )
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return (ULONG)ref;
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This->ref ++;
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if ( This->pOnFinalRelease != NULL )
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(*(This->pOnFinalRelease))(iface);
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This->ref --;
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QUARTZ_FreeObj(This);
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return 0;
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}
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static ICOM_VTABLE(IUnknown) iunknown =
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{
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ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
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/* IUnknown fields */
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IUnknown_fnQueryInterface,
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IUnknown_fnAddRef,
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IUnknown_fnRelease,
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};
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void QUARTZ_IUnkInit( QUARTZ_IUnkImpl* pImpl, IUnknown* punkOuter )
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{
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TRACE("(%p)\n",pImpl);
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ICOM_VTBL(pImpl) = &iunknown;
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pImpl->pEntries = NULL;
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pImpl->dwEntries = 0;
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pImpl->pDelegationFirst = NULL;
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pImpl->pOnFinalRelease = NULL;
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pImpl->ref = 1;
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pImpl->punkControl = (IUnknown*)pImpl;
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/* for implementing aggregation. */
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if ( punkOuter != NULL )
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pImpl->punkControl = punkOuter;
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}
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void QUARTZ_IUnkAddDelegation(
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QUARTZ_IUnkImpl* pImpl, QUARTZ_IFDelegation* pDelegation )
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{
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pDelegation->pNext = pImpl->pDelegationFirst;
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pImpl->pDelegationFirst = pDelegation;
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}
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