reactos/lib/devenum/factory.c

   1 /*
   2  *      ClassFactory implementation for DEVENUM.dll
   3  *
   4  * Copyright (C) 2002 John K. Hohm
   5  * Copyright (C) 2002 Robert Shearman
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "devenum_private.h"
  23
  24 #include "wine/debug.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(devenum);
  27
  28 /**********************************************************************
  29  * DEVENUM_IClassFactory_QueryInterface (also IUnknown)
  30  */
  31 static HRESULT WINAPI DEVENUM_IClassFactory_QueryInterface(
  32     LPCLASSFACTORY iface,
  33     REFIID riid,
  34     LPVOID *ppvObj)
  35 {
  36     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
  37
  38     if (ppvObj == NULL) return E_POINTER;
  39
  40     if (IsEqualGUID(riid, &IID_IUnknown) ||
  41         IsEqualGUID(riid, &IID_IClassFactory))
  42     {
  43         *ppvObj = (LPVOID)iface;
  44         IClassFactory_AddRef(iface);
  45         return S_OK;
  46     }
  47     else if (IsEqualGUID(riid, &IID_IParseDisplayName))
  48     {
  49         return IClassFactory_CreateInstance(iface, NULL, riid, ppvObj);
  50     }
  51
  52     FIXME("- no interface\n\tIID:\t%s\n", debugstr_guid(riid));
  53     return E_NOINTERFACE;
  54 }
  55
  56 /**********************************************************************
  57  * DEVENUM_IClassFactory_AddRef (also IUnknown)
  58  */
  59 static ULONG WINAPI DEVENUM_IClassFactory_AddRef(LPCLASSFACTORY iface)
  60 {
  61     TRACE("\n");
  62
  63     DEVENUM_LockModule();
  64
  65     return 2; /* non-heap based object */
  66 }
  67
  68 /**********************************************************************
  69  * DEVENUM_IClassFactory_Release (also IUnknown)
  70  */
  71 static ULONG WINAPI DEVENUM_IClassFactory_Release(LPCLASSFACTORY iface)
  72 {
  73     TRACE("\n");
  74
  75     DEVENUM_UnlockModule();
  76
  77     return 1; /* non-heap based object */
  78 }
  79
  80 /**********************************************************************
  81  * DEVENUM_IClassFactory_CreateInstance
  82  */
  83 static HRESULT WINAPI DEVENUM_IClassFactory_CreateInstance(
  84     LPCLASSFACTORY iface,
  85     LPUNKNOWN pUnkOuter,
  86     REFIID riid,
  87     LPVOID *ppvObj)
  88 {
  89     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
  90
  91     if (ppvObj == NULL) return E_POINTER;
  92
  93     /* Don't support aggregation (Windows doesn't) */
  94     if (pUnkOuter != NULL) return CLASS_E_NOAGGREGATION;
  95
  96     if (IsEqualGUID(&IID_ICreateDevEnum, riid))
  97     {
  98         *ppvObj = &DEVENUM_CreateDevEnum;
  99         return S_OK;
 100     }
 101     if (IsEqualGUID(&IID_IParseDisplayName, riid))
 102     {
 103         *ppvObj = &DEVENUM_ParseDisplayName;
 104         return S_OK;
 105     }
 106
 107     return CLASS_E_CLASSNOTAVAILABLE;
 108 }
 109
 110 /**********************************************************************
 111  * DEVENUM_IClassFactory_LockServer
 112  */
 113 static HRESULT WINAPI DEVENUM_IClassFactory_LockServer(
 114     LPCLASSFACTORY iface,
 115     BOOL fLock)
 116 {
 117     TRACE("\n");
 118
 119     if (fLock)
 120         DEVENUM_LockModule();
 121     else
 122         DEVENUM_UnlockModule();
 123     return S_OK;
 124 }
 125
 126 /**********************************************************************
 127  * IClassFactory_Vtbl
 128  */
 129 static IClassFactoryVtbl IClassFactory_Vtbl =
 130 {
 131     DEVENUM_IClassFactory_QueryInterface,
 132     DEVENUM_IClassFactory_AddRef,
 133     DEVENUM_IClassFactory_Release,
 134     DEVENUM_IClassFactory_CreateInstance,
 135     DEVENUM_IClassFactory_LockServer
 136 };
 137
 138 /**********************************************************************
 139  * static ClassFactory instance
 140  */
 141 ClassFactoryImpl DEVENUM_ClassFactory = { &IClassFactory_Vtbl };