ntdll: Remove unneeded casts.
[wine] / dlls / comcat / factory.c
1 /*
2  *      ClassFactory implementation for comcat.dll
3  *
4  * Copyright (C) 2002 John K. Hohm
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
21 #include "comcat_private.h"
22
23 #include "wine/debug.h"
24
25 WINE_DEFAULT_DEBUG_CHANNEL(ole);
26
27 static ULONG WINAPI COMCAT_IClassFactory_AddRef(LPCLASSFACTORY iface);
28
29 /**********************************************************************
30  * COMCAT_IClassFactory_QueryInterface (also IUnknown)
31  */
32 static HRESULT WINAPI COMCAT_IClassFactory_QueryInterface(
33     LPCLASSFACTORY iface,
34     REFIID riid,
35     LPVOID *ppvObj)
36 {
37     ClassFactoryImpl *This = (ClassFactoryImpl *)iface;
38     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
39
40     if (This == NULL || ppvObj == NULL) return E_POINTER;
41
42     if (IsEqualGUID(riid, &IID_IUnknown) ||
43         IsEqualGUID(riid, &IID_IClassFactory))
44     {
45         *ppvObj = (LPVOID)iface;
46         COMCAT_IClassFactory_AddRef(iface);
47         return S_OK;
48     }
49
50     return E_NOINTERFACE;
51 }
52
53 /**********************************************************************
54  * COMCAT_IClassFactory_AddRef (also IUnknown)
55  */
56 static ULONG WINAPI COMCAT_IClassFactory_AddRef(LPCLASSFACTORY iface)
57 {
58     ClassFactoryImpl *This = (ClassFactoryImpl *)iface;
59     ULONG ref;
60
61     TRACE("\n");
62
63     if (This == NULL) return E_POINTER;
64
65     ref = InterlockedIncrement(&This->ref);
66     if (ref == 1) {
67         InterlockedIncrement(&dll_ref);
68     }
69     return ref;
70 }
71
72 /**********************************************************************
73  * COMCAT_IClassFactory_Release (also IUnknown)
74  */
75 static ULONG WINAPI COMCAT_IClassFactory_Release(LPCLASSFACTORY iface)
76 {
77     ClassFactoryImpl *This = (ClassFactoryImpl *)iface;
78     ULONG ref;
79
80     TRACE("\n");
81
82     if (This == NULL) return E_POINTER;
83
84     ref = InterlockedDecrement(&This->ref);
85     if (ref == 0) {
86         InterlockedDecrement(&dll_ref);
87     }
88     return ref;
89 }
90
91 /**********************************************************************
92  * COMCAT_IClassFactory_CreateInstance
93  */
94 static HRESULT WINAPI COMCAT_IClassFactory_CreateInstance(
95     LPCLASSFACTORY iface,
96     LPUNKNOWN pUnkOuter,
97     REFIID riid,
98     LPVOID *ppvObj)
99 {
100     ClassFactoryImpl *This = (ClassFactoryImpl *)iface;
101     HRESULT res;
102     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
103
104     if (This == NULL || ppvObj == NULL) return E_POINTER;
105
106     /* Don't support aggregation (Windows doesn't) */
107     if (pUnkOuter != NULL) return CLASS_E_NOAGGREGATION;
108
109     res = IUnknown_QueryInterface((LPUNKNOWN)&COMCAT_ComCatMgr, riid, ppvObj);
110     if (SUCCEEDED(res)) {
111         return res;
112     }
113
114     return CLASS_E_CLASSNOTAVAILABLE;
115 }
116
117 /**********************************************************************
118  * COMCAT_IClassFactory_LockServer
119  */
120 static HRESULT WINAPI COMCAT_IClassFactory_LockServer(
121     LPCLASSFACTORY iface,
122     BOOL fLock)
123 {
124     TRACE("\n");
125
126     if (fLock != FALSE) {
127         IClassFactory_AddRef(iface);
128     } else {
129         IClassFactory_Release(iface);
130     }
131     return S_OK;
132 }
133
134 /**********************************************************************
135  * IClassFactory_Vtbl
136  */
137 static const IClassFactoryVtbl IClassFactory_Vtbl =
138 {
139     COMCAT_IClassFactory_QueryInterface,
140     COMCAT_IClassFactory_AddRef,
141     COMCAT_IClassFactory_Release,
142     COMCAT_IClassFactory_CreateInstance,
143     COMCAT_IClassFactory_LockServer
144 };
145
146 /**********************************************************************
147  * static ClassFactory instance
148  */
149 ClassFactoryImpl COMCAT_ClassFactory = { &IClassFactory_Vtbl, 0 };