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146 lines
4 KiB
C
146 lines
4 KiB
C
/*
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* IParent implementation
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*
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* Copyright (c) 2006 Stefan Dösinger
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* A universal parent interface for everything in WineD3D that doesn't have
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* a DDraw counterpart
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*/
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#include "config.h"
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#include "wine/port.h"
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#include "wine/debug.h"
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#include <assert.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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#define COBJMACROS
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#include "windef.h"
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#include "winbase.h"
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#include "winerror.h"
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#include "wingdi.h"
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#include "wine/exception.h"
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#include "ddraw.h"
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#include "d3d.h"
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#include "ddraw_private.h"
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WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
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/*****************************************************************************
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* IUnknown methods
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*****************************************************************************/
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/*****************************************************************************
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* IParent::Queryinterface
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*
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* It can't query any interfaces, and it's not used for anything. So
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* it just returns E_NOINTERFACE
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*
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* Params:
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* riid: guid of queried interface
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* obj: returns a pointer to the interface
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*
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* Return values
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* This implementation always returns E_NOINTERFACE and NULL
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*
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*****************************************************************************/
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static HRESULT WINAPI
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IParentImpl_QueryInterface(IParent *iface,
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REFIID riid,
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void **obj)
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{
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TRACE("(%p)->(%s,%p)\n", iface, debugstr_guid(riid), obj);
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*obj = NULL;
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if ( IsEqualGUID( &IID_IUnknown, riid ) ||
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IsEqualGUID( &IID_IParent, riid ) )
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{
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*obj = iface;
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IParent_AddRef(iface);
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return DD_OK;
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}
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return E_NOINTERFACE;
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}
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/*****************************************************************************
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* IParent::AddRef
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*
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* Increases the refcount
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*
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* Params:
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*
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* Return values
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* The new refcount
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*
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*****************************************************************************/
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static ULONG WINAPI
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IParentImpl_AddRef(IParent *iface)
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{
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IParentImpl *This = (IParentImpl *)iface;
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ULONG ref = InterlockedIncrement(&This->ref);
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TRACE("(%p) : AddRef from %d\n", This, ref - 1);
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return ref;
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}
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/*****************************************************************************
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* IParent::Release
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*
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* Releases the refcount, and destroys the object if the refcount falls to 0
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* Also releases the child object, if destroyed. That's almost the whole sense
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* of this interface.
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*
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* Params:
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*
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* Return values
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* The new refcount
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*
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*****************************************************************************/
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static ULONG WINAPI IParentImpl_Release(IParent *iface)
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{
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IParentImpl *This = (IParentImpl *)iface;
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ULONG ref = InterlockedDecrement(&This->ref);
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TRACE("(%p) : ReleaseRef to %d\n", This, ref);
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if (ref == 0)
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{
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TRACE("(%p) Releasing child at %p\n", This, This->child);
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if(This->child)
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IUnknown_Release(This->child);
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HeapFree(GetProcessHeap(), 0, This);
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TRACE("Released\n");
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}
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return ref;
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}
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/*****************************************************************************
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* The VTable
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*****************************************************************************/
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const IParentVtbl IParent_Vtbl =
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{
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IParentImpl_QueryInterface,
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IParentImpl_AddRef,
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IParentImpl_Release,
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};
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