- Merge from trunk up to r45543
[reactos.git] / dll / directx / wine / ddraw / parent.c
1 /*
2 * IParent implementation
3 *
4 * Copyright (c) 2006 Stefan Dösinger
5 *
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.
10 *
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.
15 *
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
19 *
20 * A universal parent interface for everything in WineD3D that doesn't have
21 * a DDraw counterpart
22 */
23
24 #include "config.h"
25 #include "wine/port.h"
26 #include "wine/debug.h"
27
28 #include <assert.h>
29 #include <stdarg.h>
30 #include <string.h>
31 #include <stdlib.h>
32
33 #define COBJMACROS
34
35 #include "windef.h"
36 #include "winbase.h"
37 #include "winerror.h"
38 #include "wingdi.h"
39 #include "wine/exception.h"
40
41 #include "ddraw.h"
42 #include "d3d.h"
43
44 #include "ddraw_private.h"
45
46 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
47
48 /*****************************************************************************
49 * IUnknown methods
50 *****************************************************************************/
51
52 /*****************************************************************************
53 * IParent::Queryinterface
54 *
55 * It can't query any interfaces, and it's not used for anything. So
56 * it just returns E_NOINTERFACE
57 *
58 * Params:
59 * riid: guid of queried interface
60 * obj: returns a pointer to the interface
61 *
62 * Return values
63 * This implementation always returns E_NOINTERFACE and NULL
64 *
65 *****************************************************************************/
66 static HRESULT WINAPI
67 IParentImpl_QueryInterface(IParent *iface,
68 REFIID riid,
69 void **obj)
70 {
71 TRACE("(%p)->(%s,%p)\n", iface, debugstr_guid(riid), obj);
72
73 *obj = NULL;
74 if ( IsEqualGUID( &IID_IUnknown, riid ) ||
75 IsEqualGUID( &IID_IParent, riid ) )
76 {
77 *obj = iface;
78 IParent_AddRef(iface);
79 return DD_OK;
80 }
81 return E_NOINTERFACE;
82 }
83
84 /*****************************************************************************
85 * IParent::AddRef
86 *
87 * Increases the refcount
88 *
89 * Params:
90 *
91 * Return values
92 * The new refcount
93 *
94 *****************************************************************************/
95 static ULONG WINAPI
96 IParentImpl_AddRef(IParent *iface)
97 {
98 IParentImpl *This = (IParentImpl *)iface;
99 ULONG ref = InterlockedIncrement(&This->ref);
100
101 TRACE("(%p) : AddRef from %d\n", This, ref - 1);
102
103 return ref;
104 }
105
106
107 /*****************************************************************************
108 * IParent::Release
109 *
110 * Releases the refcount, and destroys the object if the refcount falls to 0
111 * Also releases the child object, if destroyed. That's almost the whole sense
112 * of this interface.
113 *
114 * Params:
115 *
116 * Return values
117 * The new refcount
118 *
119 *****************************************************************************/
120 static ULONG WINAPI IParentImpl_Release(IParent *iface)
121 {
122 IParentImpl *This = (IParentImpl *)iface;
123 ULONG ref = InterlockedDecrement(&This->ref);
124
125 TRACE("(%p) : ReleaseRef to %d\n", This, ref);
126
127 if (ref == 0)
128 {
129 TRACE("(%p) Releasing child at %p\n", This, This->child);
130 if(This->child)
131 IUnknown_Release(This->child);
132 HeapFree(GetProcessHeap(), 0, This);
133 TRACE("Released\n");
134 }
135 return ref;
136 }
137
138 /*****************************************************************************
139 * The VTable
140 *****************************************************************************/
141 const IParentVtbl IParent_Vtbl =
142 {
143 IParentImpl_QueryInterface,
144 IParentImpl_AddRef,
145 IParentImpl_Release,
146 };