2 * IParent implementation
4 * Copyright (c) 2006 Stefan Dösinger
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * A universal parent interface for everything in WineD3D that doesn't have
25 #include "wine/port.h"
27 #include "ddraw_private.h"
29 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
31 /*****************************************************************************
33 *****************************************************************************/
35 /*****************************************************************************
36 * IParent::Queryinterface
38 * It can't query any interfaces, and it's not used for anything. So
39 * it just returns E_NOINTERFACE
42 * riid: guid of queried interface
43 * obj: returns a pointer to the interface
46 * This implementation always returns E_NOINTERFACE and NULL
48 *****************************************************************************/
50 IParentImpl_QueryInterface(IParent *iface,
54 TRACE("iface %p, riid %s, object %p.\n", iface, debugstr_guid(riid), obj);
57 if ( IsEqualGUID( &IID_IUnknown, riid ) ||
58 IsEqualGUID( &IID_IParent, riid ) )
61 IParent_AddRef(iface);
67 /*****************************************************************************
70 * Increases the refcount
77 *****************************************************************************/
79 IParentImpl_AddRef(IParent *iface)
81 IParentImpl *This = (IParentImpl *)iface;
82 ULONG ref = InterlockedIncrement(&This->ref);
84 TRACE("%p increasing refcount to %u.\n", This, ref);
90 /*****************************************************************************
93 * Releases the refcount, and destroys the object if the refcount falls to 0
94 * Also releases the child object, if destroyed. That's almost the whole sense
102 *****************************************************************************/
103 static ULONG WINAPI IParentImpl_Release(IParent *iface)
105 IParentImpl *This = (IParentImpl *)iface;
106 ULONG ref = InterlockedDecrement(&This->ref);
108 TRACE("%p decreasing refcount to %u.\n", This, ref);
112 TRACE("(%p) Releasing child at %p\n", This, This->child);
114 IUnknown_Release(This->child);
115 HeapFree(GetProcessHeap(), 0, This);
121 /*****************************************************************************
123 *****************************************************************************/
124 static const struct IParentVtbl ddraw_parent_vtbl =
126 IParentImpl_QueryInterface,
131 void ddraw_parent_init(IParentImpl *parent)
133 parent->lpVtbl = &ddraw_parent_vtbl;