wine/dlls/ddraw/parent.c

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/*
* IParent implementation
*
* Copyright (c) 2006 Stefan D<EFBFBD>singer
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* A universal parent interface for everything in WineD3D that doesn't have
* a DDraw counterpart
*/
#include "config.h"
#include "wine/port.h"
#include "wine/debug.h"
#include <assert.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "winerror.h"
#include "wingdi.h"
#include "wine/exception.h"
#include "excpt.h"
#include "ddraw.h"
#include "d3d.h"
#include "ddraw_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
const GUID IID_IParent = {0xc20e4c88, 0x74e7, 0x4940, {0xba, 0x9f, 0x2e, 0x32, 0x3f, 0x9d, 0xc9, 0x81}};
/*****************************************************************************
* IUnknown methods
*****************************************************************************/
/*****************************************************************************
* IParent::Queryinterface
*
* It can't query any interfaces, and it's not used for anything. So
* it just returns E_NOINTERFACE
*
* Params:
* riid: guid of queried interface
* obj: returns a pointer to the interface
*
* Return values
* This implementation always returns E_NOINTERFACE and NULL
*
*****************************************************************************/
static HRESULT WINAPI
IParentImpl_QueryInterface(IParent *iface,
REFIID riid,
void **obj)
{
ICOM_THIS_FROM(IParentImpl, IParent, iface);
TRACE("(%p)->(%s,%p)\n", This, debugstr_guid(riid), obj);
*obj = NULL;
if ( IsEqualGUID( &IID_IUnknown, riid ) ||
IsEqualGUID( &IID_IParent, riid ) )
{
*obj = ICOM_INTERFACE(This, IParent);
IParent_AddRef(ICOM_INTERFACE(This, IParent));
return DD_OK;
}
return E_NOINTERFACE;
}
/*****************************************************************************
* IParent::AddRef
*
* Increases the refcount
*
* Params:
*
* Return values
* The new refcount
*
*****************************************************************************/
static ULONG WINAPI
IParentImpl_AddRef(IParent *iface)
{
ICOM_THIS_FROM(IParentImpl, IParent, iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) : AddRef from %d\n", This, ref - 1);
return ref;
}
/*****************************************************************************
* IParent::Release
*
* Releases the refcount, and destroys the object if the refcount falls to 0
* Also releases the child object, if destroyed. That's almost the whole sense
* of this interface.
*
* Params:
*
* Return values
* The new refcount
*
*****************************************************************************/
static ULONG WINAPI
IParentImpl_Release(IParent *iface)
{
ICOM_THIS_FROM(IParentImpl, IParent, iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) : ReleaseRef to %d\n", This, ref);
if (ref == 0)
{
TRACE("(%p) Releasing child at %p\n", This, This->child);
if(This->child)
IUnknown_Release(This->child);
HeapFree(GetProcessHeap(), 0, This);
TRACE("Released\n");
}
return ref;
}
/*****************************************************************************
* The VTable
*****************************************************************************/
const IParentVtbl IParent_Vtbl =
{
IParentImpl_QueryInterface,
IParentImpl_AddRef,
IParentImpl_Release,
};