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 const GUID IID_IParent = {0xc20e4c88, 0x74e7, 0x4940, {0xba, 0x9f, 0x2e, 0x32, 0x3f, 0x9d, 0xc9, 0x81}};
49
50 /*****************************************************************************
51 * IUnknown methods
52 *****************************************************************************/
53
54 /*****************************************************************************
55 * IParent::Queryinterface
56 *
57 * It can't query any interfaces, and it's not used for anything. So
58 * it just returns E_NOINTERFACE
59 *
60 * Params:
61 * riid: guid of queried interface
62 * obj: returns a pointer to the interface
63 *
64 * Return values
65 * This implementation always returns E_NOINTERFACE and NULL
66 *
67 *****************************************************************************/
68 static HRESULT WINAPI
69 IParentImpl_QueryInterface(IParent *iface,
70 REFIID riid,
71 void **obj)
72 {
73 ICOM_THIS_FROM(IParentImpl, IParent, iface);
74 TRACE("(%p)->(%s,%p)\n", This, debugstr_guid(riid), obj);
75
76 *obj = NULL;
77 if ( IsEqualGUID( &IID_IUnknown, riid ) ||
78 IsEqualGUID( &IID_IParent, riid ) )
79 {
80 *obj = ICOM_INTERFACE(This, IParent);
81 IParent_AddRef(ICOM_INTERFACE(This, IParent));
82 return DD_OK;
83 }
84 return E_NOINTERFACE;
85 }
86
87 /*****************************************************************************
88 * IParent::AddRef
89 *
90 * Increases the refcount
91 *
92 * Params:
93 *
94 * Return values
95 * The new refcount
96 *
97 *****************************************************************************/
98 static ULONG WINAPI
99 IParentImpl_AddRef(IParent *iface)
100 {
101 ICOM_THIS_FROM(IParentImpl, IParent, iface);
102 ULONG ref = InterlockedIncrement(&This->ref);
103
104 TRACE("(%p) : AddRef from %d\n", This, ref - 1);
105
106 return ref;
107 }
108
109
110 /*****************************************************************************
111 * IParent::Release
112 *
113 * Releases the refcount, and destroys the object if the refcount falls to 0
114 * Also releases the child object, if destroyed. That's almost the whole sense
115 * of this interface.
116 *
117 * Params:
118 *
119 * Return values
120 * The new refcount
121 *
122 *****************************************************************************/
123 static ULONG WINAPI
124 IParentImpl_Release(IParent *iface)
125 {
126 ICOM_THIS_FROM(IParentImpl, IParent, iface);
127 ULONG ref = InterlockedDecrement(&This->ref);
128
129 TRACE("(%p) : ReleaseRef to %d\n", This, ref);
130
131 if (ref == 0)
132 {
133 TRACE("(%p) Releasing child at %p\n", This, This->child);
134 if(This->child)
135 IUnknown_Release(This->child);
136 HeapFree(GetProcessHeap(), 0, This);
137 TRACE("Released\n");
138 }
139 return ref;
140 }
141
142 /*****************************************************************************
143 * The VTable
144 *****************************************************************************/
145 const IParentVtbl IParent_Vtbl =
146 {
147 IParentImpl_QueryInterface,
148 IParentImpl_AddRef,
149 IParentImpl_Release,
150 };
151
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