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 };