dlls/ole32/ftmarshal.c

   1 /*
   2  *      free threaded marshaller
   3  *
   4  *  Copyright 2002  Juergen Schmied
   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 "config.h"
  22
  23 #include <stdlib.h>
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #define COBJMACROS
  30
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "objbase.h"
  34
  35 #include "wine/debug.h"
  36
  37 #include "compobj_private.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  40
  41 typedef struct _FTMarshalImpl {
  42         IUnknown IUnknown_inner;
  43         IMarshal IMarshal_iface;
  44         IUnknown *outer_unk;
  45         LONG ref;
  46 } FTMarshalImpl;
  47
  48 static inline FTMarshalImpl *impl_from_IUnknown(IUnknown *iface)
  49 {
  50     return CONTAINING_RECORD(iface, FTMarshalImpl, IUnknown_inner);
  51 }
  52
  53 static inline FTMarshalImpl *impl_from_IMarshal( IMarshal *iface )
  54 {
  55     return CONTAINING_RECORD(iface, FTMarshalImpl, IMarshal_iface);
  56 }
  57
  58 /* inner IUnknown to handle aggregation */
  59 static HRESULT WINAPI
  60 IiFTMUnknown_fnQueryInterface (IUnknown * iface, REFIID riid, LPVOID * ppv)
  61 {
  62
  63     FTMarshalImpl *This = impl_from_IUnknown(iface);
  64
  65     TRACE ("\n");
  66     *ppv = NULL;
  67
  68     if (IsEqualIID (&IID_IUnknown, riid))
  69         *ppv = &This->IUnknown_inner;
  70     else if (IsEqualIID (&IID_IMarshal, riid))
  71         *ppv = &This->IMarshal_iface;
  72     else {
  73         FIXME ("No interface for %s.\n", debugstr_guid (riid));
  74         return E_NOINTERFACE;
  75     }
  76     IUnknown_AddRef ((IUnknown *) * ppv);
  77     return S_OK;
  78 }
  79
  80 static ULONG WINAPI IiFTMUnknown_fnAddRef (IUnknown * iface)
  81 {
  82
  83     FTMarshalImpl *This = impl_from_IUnknown(iface);
  84
  85     TRACE ("\n");
  86     return InterlockedIncrement (&This->ref);
  87 }
  88
  89 static ULONG WINAPI IiFTMUnknown_fnRelease (IUnknown * iface)
  90 {
  91
  92     FTMarshalImpl *This = impl_from_IUnknown(iface);
  93
  94     TRACE ("\n");
  95     if (InterlockedDecrement (&This->ref))
  96         return This->ref;
  97     HeapFree (GetProcessHeap (), 0, This);
  98     return 0;
  99 }
 100
 101 static const IUnknownVtbl iunkvt =
 102 {
 103         IiFTMUnknown_fnQueryInterface,
 104         IiFTMUnknown_fnAddRef,
 105         IiFTMUnknown_fnRelease
 106 };
 107
 108 static HRESULT WINAPI
 109 FTMarshalImpl_QueryInterface (LPMARSHAL iface, REFIID riid, LPVOID * ppv)
 110 {
 111
 112     FTMarshalImpl *This = impl_from_IMarshal(iface);
 113
 114     TRACE ("(%p)->(%s,%p)\n", This, debugstr_guid (riid), ppv);
 115     return IUnknown_QueryInterface(This->outer_unk, riid, ppv);
 116 }
 117
 118 static ULONG WINAPI
 119 FTMarshalImpl_AddRef (LPMARSHAL iface)
 120 {
 121
 122     FTMarshalImpl *This = impl_from_IMarshal(iface);
 123
 124     TRACE ("\n");
 125     return IUnknown_AddRef(This->outer_unk);
 126 }
 127
 128 static ULONG WINAPI
 129 FTMarshalImpl_Release (LPMARSHAL iface)
 130 {
 131
 132     FTMarshalImpl *This = impl_from_IMarshal(iface);
 133
 134     TRACE ("\n");
 135     return IUnknown_Release(This->outer_unk);
 136 }
 137
 138 static HRESULT WINAPI
 139 FTMarshalImpl_GetUnmarshalClass (LPMARSHAL iface, REFIID riid, void *pv, DWORD dwDestContext,
 140                                                 void *pvDestContext, DWORD mshlflags, CLSID * pCid)
 141 {
 142     TRACE("(%s, %p, 0x%x, %p, 0x%x, %p)\n", debugstr_guid(riid), pv,
 143         dwDestContext, pvDestContext, mshlflags, pCid);
 144     if (dwDestContext == MSHCTX_INPROC || dwDestContext == MSHCTX_CROSSCTX)
 145         *pCid = CLSID_InProcFreeMarshaler;
 146     else
 147         *pCid = CLSID_StdMarshal;
 148     return S_OK;
 149 }
 150
 151 static HRESULT WINAPI
 152 FTMarshalImpl_GetMarshalSizeMax (LPMARSHAL iface, REFIID riid, void *pv, DWORD dwDestContext,
 153                                                 void *pvDestContext, DWORD mshlflags, DWORD * pSize)
 154 {
 155
 156     IMarshal *pMarshal = NULL;
 157     HRESULT hres;
 158
 159     TRACE("(%s, %p, 0x%x, %p, 0x%x, %p)\n", debugstr_guid(riid), pv,
 160         dwDestContext, pvDestContext, mshlflags, pSize);
 161
 162     /* if the marshalling happens inside the same process the interface pointer is
 163        copied between the apartments */
 164     if (dwDestContext == MSHCTX_INPROC || dwDestContext == MSHCTX_CROSSCTX) {
 165         *pSize = sizeof (mshlflags) + sizeof (pv) + sizeof (DWORD) + sizeof (GUID);
 166         return S_OK;
 167     }
 168
 169     /* use the standard marshaller to handle all other cases */
 170     CoGetStandardMarshal (riid, pv, dwDestContext, pvDestContext, mshlflags, &pMarshal);
 171     hres = IMarshal_GetMarshalSizeMax (pMarshal, riid, pv, dwDestContext, pvDestContext, mshlflags, pSize);
 172     IMarshal_Release (pMarshal);
 173     return hres;
 174 }
 175
 176 static HRESULT WINAPI
 177 FTMarshalImpl_MarshalInterface (LPMARSHAL iface, IStream * pStm, REFIID riid, void *pv,
 178                                DWORD dwDestContext, void *pvDestContext, DWORD mshlflags)
 179 {
 180
 181     IMarshal *pMarshal = NULL;
 182     HRESULT hres;
 183
 184     TRACE("(%p, %s, %p, 0x%x, %p, 0x%x)\n", pStm, debugstr_guid(riid), pv,
 185         dwDestContext, pvDestContext, mshlflags);
 186
 187     /* if the marshalling happens inside the same process the interface pointer is
 188        copied between the apartments */
 189     if (dwDestContext == MSHCTX_INPROC || dwDestContext == MSHCTX_CROSSCTX) {
 190         void *object;
 191         DWORD constant = 0;
 192         GUID unknown_guid = { 0 };
 193
 194         hres = IUnknown_QueryInterface((IUnknown *)pv, riid, &object);
 195         if (FAILED(hres))
 196             return hres;
 197
 198         /* don't hold a reference to table-weak marshaled interfaces */
 199         if (mshlflags & MSHLFLAGS_TABLEWEAK)
 200             IUnknown_Release((IUnknown *)object);
 201
 202         hres = IStream_Write (pStm, &mshlflags, sizeof (mshlflags), NULL);
 203         if (hres != S_OK) return STG_E_MEDIUMFULL;
 204
 205         hres = IStream_Write (pStm, &object, sizeof (object), NULL);
 206         if (hres != S_OK) return STG_E_MEDIUMFULL;
 207
 208         if (sizeof(object) == sizeof(DWORD))
 209         {
 210             hres = IStream_Write (pStm, &constant, sizeof (constant), NULL);
 211             if (hres != S_OK) return STG_E_MEDIUMFULL;
 212         }
 213
 214         hres = IStream_Write (pStm, &unknown_guid, sizeof (unknown_guid), NULL);
 215         if (hres != S_OK) return STG_E_MEDIUMFULL;
 216
 217         return S_OK;
 218     }
 219
 220     /* use the standard marshaler to handle all other cases */
 221     CoGetStandardMarshal (riid, pv, dwDestContext, pvDestContext, mshlflags, &pMarshal);
 222     hres = IMarshal_MarshalInterface (pMarshal, pStm, riid, pv, dwDestContext, pvDestContext, mshlflags);
 223     IMarshal_Release (pMarshal);
 224     return hres;
 225 }
 226
 227 static HRESULT WINAPI
 228 FTMarshalImpl_UnmarshalInterface (LPMARSHAL iface, IStream * pStm, REFIID riid, void **ppv)
 229 {
 230     DWORD mshlflags;
 231     IUnknown *object;
 232     DWORD constant;
 233     GUID unknown_guid;
 234     HRESULT hres;
 235
 236     TRACE ("(%p, %s, %p)\n", pStm, debugstr_guid(riid), ppv);
 237
 238     hres = IStream_Read (pStm, &mshlflags, sizeof (mshlflags), NULL);
 239     if (hres != S_OK) return STG_E_READFAULT;
 240
 241     hres = IStream_Read (pStm, &object, sizeof (object), NULL);
 242     if (hres != S_OK) return STG_E_READFAULT;
 243
 244     if (sizeof(object) == sizeof(DWORD))
 245     {
 246         hres = IStream_Read (pStm, &constant, sizeof (constant), NULL);
 247         if (hres != S_OK) return STG_E_READFAULT;
 248         if (constant != 0)
 249             FIXME("constant is 0x%x instead of 0\n", constant);
 250     }
 251
 252     hres = IStream_Read (pStm, &unknown_guid, sizeof (unknown_guid), NULL);
 253     if (hres != S_OK) return STG_E_READFAULT;
 254
 255     hres = IUnknown_QueryInterface(object, riid, ppv);
 256     if (!(mshlflags & (MSHLFLAGS_TABLEWEAK|MSHLFLAGS_TABLESTRONG)))
 257         IUnknown_Release(object);
 258     return hres;
 259 }
 260
 261 static HRESULT WINAPI FTMarshalImpl_ReleaseMarshalData (LPMARSHAL iface, IStream * pStm)
 262 {
 263     DWORD mshlflags;
 264     IUnknown *object;
 265     DWORD constant;
 266     GUID unknown_guid;
 267     HRESULT hres;
 268
 269     TRACE ("(%p)\n", pStm);
 270
 271     hres = IStream_Read (pStm, &mshlflags, sizeof (mshlflags), NULL);
 272     if (hres != S_OK) return STG_E_READFAULT;
 273
 274     hres = IStream_Read (pStm, &object, sizeof (object), NULL);
 275     if (hres != S_OK) return STG_E_READFAULT;
 276
 277     if (sizeof(object) == sizeof(DWORD))
 278     {
 279         hres = IStream_Read (pStm, &constant, sizeof (constant), NULL);
 280         if (hres != S_OK) return STG_E_READFAULT;
 281         if (constant != 0)
 282             FIXME("constant is 0x%x instead of 0\n", constant);
 283     }
 284
 285     hres = IStream_Read (pStm, &unknown_guid, sizeof (unknown_guid), NULL);
 286     if (hres != S_OK) return STG_E_READFAULT;
 287
 288     IUnknown_Release(object);
 289     return S_OK;
 290 }
 291
 292 static HRESULT WINAPI FTMarshalImpl_DisconnectObject (LPMARSHAL iface, DWORD dwReserved)
 293 {
 294     TRACE ("()\n");
 295     /* nothing to do */
 296     return S_OK;
 297 }
 298
 299 static const IMarshalVtbl ftmvtbl =
 300 {
 301         FTMarshalImpl_QueryInterface,
 302         FTMarshalImpl_AddRef,
 303         FTMarshalImpl_Release,
 304         FTMarshalImpl_GetUnmarshalClass,
 305         FTMarshalImpl_GetMarshalSizeMax,
 306         FTMarshalImpl_MarshalInterface,
 307         FTMarshalImpl_UnmarshalInterface,
 308         FTMarshalImpl_ReleaseMarshalData,
 309         FTMarshalImpl_DisconnectObject
 310 };
 311
 312 /***********************************************************************
 313  *          CoCreateFreeThreadedMarshaler [OLE32.@]
 314  *
 315  * Creates a free-threaded marshaler.
 316  *
 317  * PARAMS
 318  *  punkOuter    [I] Optional. Outer unknown.
 319  *  ppunkMarshal [O] On return, the inner unknown of the created free-threaded marshaler.
 320  *
 321  * RETURNS
 322  *  Success: S_OK
 323  *  Failure: E_OUTOFMEMORY if no memory available to create object.
 324  *
 325  * NOTES
 326  *  Objects that ensure their state is maintained consistent when used by
 327  *  multiple threads and reference no single-threaded objects are known as
 328  *  free-threaded. The free-threaded marshaler enables these objects to be
 329  *  efficiently marshaled within the same process, by not creating proxies
 330  *  (as they aren't needed for the object to be safely used), whilst still
 331  *  allowing the object to be used in inter-process and inter-machine contexts.
 332  */
 333 HRESULT WINAPI CoCreateFreeThreadedMarshaler (LPUNKNOWN punkOuter, LPUNKNOWN * ppunkMarshal)
 334 {
 335
 336     FTMarshalImpl *ftm;
 337
 338     TRACE ("(%p %p)\n", punkOuter, ppunkMarshal);
 339
 340     ftm = HeapAlloc (GetProcessHeap (), 0, sizeof (FTMarshalImpl));
 341     if (!ftm)
 342         return E_OUTOFMEMORY;
 343
 344     ftm->IUnknown_inner.lpVtbl = &iunkvt;
 345     ftm->IMarshal_iface.lpVtbl = &ftmvtbl;
 346     ftm->ref = 1;
 347     ftm->outer_unk = punkOuter ? punkOuter : &ftm->IUnknown_inner;
 348
 349     *ppunkMarshal = &ftm->IUnknown_inner;
 350     return S_OK;
 351 }
 352
 353 static HRESULT WINAPI FTMarshalCF_QueryInterface(LPCLASSFACTORY iface,
 354                                                   REFIID riid, LPVOID *ppv)
 355 {
 356     *ppv = NULL;
 357     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory))
 358     {
 359         *ppv = iface;
 360         IClassFactory_AddRef(iface);
 361         return S_OK;
 362     }
 363     return E_NOINTERFACE;
 364 }
 365
 366 static ULONG WINAPI FTMarshalCF_AddRef(LPCLASSFACTORY iface)
 367 {
 368     return 2; /* non-heap based object */
 369 }
 370
 371 static ULONG WINAPI FTMarshalCF_Release(LPCLASSFACTORY iface)
 372 {
 373     return 1; /* non-heap based object */
 374 }
 375
 376 static HRESULT WINAPI FTMarshalCF_CreateInstance(LPCLASSFACTORY iface,
 377     LPUNKNOWN pUnk, REFIID riid, LPVOID *ppv)
 378 {
 379     IUnknown *pUnknown;
 380     HRESULT  hr;
 381
 382     TRACE("(%p, %s, %p)\n", pUnk, debugstr_guid(riid), ppv);
 383
 384     *ppv = NULL;
 385
 386     hr = CoCreateFreeThreadedMarshaler(pUnk, &pUnknown);
 387
 388     if (SUCCEEDED(hr))
 389     {
 390         hr = IUnknown_QueryInterface(pUnknown, riid, ppv);
 391         IUnknown_Release(pUnknown);
 392     }
 393
 394     return hr;
 395 }
 396
 397 static HRESULT WINAPI FTMarshalCF_LockServer(LPCLASSFACTORY iface, BOOL fLock)
 398 {
 399     FIXME("(%d), stub!\n",fLock);
 400     return S_OK;
 401 }
 402
 403 static const IClassFactoryVtbl FTMarshalCFVtbl =
 404 {
 405     FTMarshalCF_QueryInterface,
 406     FTMarshalCF_AddRef,
 407     FTMarshalCF_Release,
 408     FTMarshalCF_CreateInstance,
 409     FTMarshalCF_LockServer
 410 };
 411 static const IClassFactoryVtbl *FTMarshalCF = &FTMarshalCFVtbl;
 412
 413 HRESULT FTMarshalCF_Create(REFIID riid, LPVOID *ppv)
 414 {
 415     return IClassFactory_QueryInterface((IClassFactory *)&FTMarshalCF, riid, ppv);
 416 }