mcs/class/corlib/System.Runtime.InteropServices/Marshal.cs

   1 // System.Runtime.InteropServices.Marshal.cs
   2 //
   3 // Sean MacIsaac (macisaac@ximian.com)
   4 // Paolo Molaro (lupus@ximian.com)
   5 // Dietmar Maurer (dietmar@ximian.com)
   6 // Jonathan Chambers (joncham@gmail.com)
   7 //
   8 // (C) 2001-2002 Ximian, Inc.
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System.Collections;
  34 using System.Collections.Generic;
  35 using System.Runtime.CompilerServices;
  36 using System;
  37 using System.Security;
  38 using System.Reflection;
  39 using System.Threading;
  40
  41 using System.Runtime.ConstrainedExecution;
  42 #if !FULL_AOT_RUNTIME
  43 using System.Runtime.InteropServices.ComTypes;
  44 using Mono.Interop;
  45 #endif
  46
  47 namespace System.Runtime.InteropServices
  48 {
  49         public static class Marshal
  50         {
  51                 /* fields */
  52                 public static readonly int SystemMaxDBCSCharSize = 2; // don't know what this is
  53                 public static readonly int SystemDefaultCharSize = Environment.OSVersion.Platform == PlatformID.Win32NT ? 2 : 1;
  54
  55 #if !MOBILE
  56                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  57                 private extern static int AddRefInternal (IntPtr pUnk);
  58 #endif
  59
  60                 public static int AddRef (IntPtr pUnk)
  61                 {
  62 #if !MOBILE
  63                         if (pUnk == IntPtr.Zero)
  64                                 throw new ArgumentException ("Value cannot be null.", "pUnk");
  65                         return AddRefInternal (pUnk);
  66 #else
  67                         throw new NotImplementedException ();
  68 #endif
  69                 }
  70
  71                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  72                 public extern static IntPtr AllocCoTaskMem (int cb);
  73
  74                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  75                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
  76                 public extern static IntPtr AllocHGlobal (IntPtr cb);
  77
  78                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
  79                 public static IntPtr AllocHGlobal (int cb)
  80                 {
  81                         return AllocHGlobal ((IntPtr)cb);
  82                 }
  83
  84                 [MonoTODO]
  85                 public static object BindToMoniker (string monikerName)
  86                 {
  87                         throw new NotImplementedException ();
  88                 }
  89
  90                 [MonoTODO]
  91                 public static void ChangeWrapperHandleStrength (object otp, bool fIsWeak)
  92                 {
  93                         throw new NotImplementedException ();
  94                 }
  95
  96                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  97                 internal extern static void copy_to_unmanaged (Array source, int startIndex,
  98                                                                IntPtr destination, int length);
  99
 100                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 101                 internal extern static void copy_from_unmanaged (IntPtr source, int startIndex,
 102                                                                  Array destination, int length);
 103
 104                 public static void Copy (byte[] source, int startIndex, IntPtr destination, int length)
 105                 {
 106                         copy_to_unmanaged (source, startIndex, destination, length);
 107                 }
 108
 109                 public static void Copy (char[] source, int startIndex, IntPtr destination, int length)
 110                 {
 111                         copy_to_unmanaged (source, startIndex, destination, length);
 112                 }
 113
 114                 public static void Copy (short[] source, int startIndex, IntPtr destination, int length)
 115                 {
 116                         copy_to_unmanaged (source, startIndex, destination, length);
 117                 }
 118
 119                 public static void Copy (int[] source, int startIndex, IntPtr destination, int length)
 120                 {
 121                         copy_to_unmanaged (source, startIndex, destination, length);
 122                 }
 123
 124                 public static void Copy (long[] source, int startIndex, IntPtr destination, int length)
 125                 {
 126                         copy_to_unmanaged (source, startIndex, destination, length);
 127                 }
 128
 129                 public static void Copy (float[] source, int startIndex, IntPtr destination, int length)
 130                 {
 131                         copy_to_unmanaged (source, startIndex, destination, length);
 132                 }
 133
 134                 public static void Copy (double[] source, int startIndex, IntPtr destination, int length)
 135                 {
 136                         copy_to_unmanaged (source, startIndex, destination, length);
 137                 }
 138
 139                 public static void Copy (IntPtr[] source, int startIndex, IntPtr destination, int length)
 140                 {
 141                         copy_to_unmanaged (source, startIndex, destination, length);
 142                 }
 143
 144                 public static void Copy (IntPtr source, byte[] destination, int startIndex, int length)
 145                 {
 146                         copy_from_unmanaged (source, startIndex, destination, length);
 147                 }
 148
 149                 public static void Copy (IntPtr source, char[] destination, int startIndex, int length)
 150                 {
 151                         copy_from_unmanaged (source, startIndex, destination, length);
 152                 }
 153
 154                 public static void Copy (IntPtr source, short[] destination, int startIndex, int length)
 155                 {
 156                         copy_from_unmanaged (source, startIndex, destination, length);
 157                 }
 158
 159                 public static void Copy (IntPtr source, int[] destination, int startIndex, int length)
 160                 {
 161                         copy_from_unmanaged (source, startIndex, destination, length);
 162                 }
 163
 164                 public static void Copy (IntPtr source, long[] destination, int startIndex, int length)
 165                 {
 166                         copy_from_unmanaged (source, startIndex, destination, length);
 167                 }
 168
 169                 public static void Copy (IntPtr source, float[] destination, int startIndex, int length)
 170                 {
 171                         copy_from_unmanaged (source, startIndex, destination, length);
 172                 }
 173
 174                 public static void Copy (IntPtr source, double[] destination, int startIndex, int length)
 175                 {
 176                         copy_from_unmanaged (source, startIndex, destination, length);
 177                 }
 178
 179                 public static void Copy (IntPtr source, IntPtr[] destination, int startIndex, int length)
 180                 {
 181                         copy_from_unmanaged (source, startIndex, destination, length);
 182                 }
 183
 184                 public static IntPtr CreateAggregatedObject (IntPtr pOuter,
 185                                                              object o)
 186                 {
 187                         throw new NotImplementedException ();
 188                 }
 189
 190 #if !FULL_AOT_RUNTIME
 191                 public static object CreateWrapperOfType (object o, Type t)
 192                 {
 193                         __ComObject co = o as __ComObject;
 194                         if (co == null)
 195                                 throw new ArgumentException ("o must derive from __ComObject", "o");
 196                         if (t == null)
 197                                 throw new ArgumentNullException ("t");
 198
 199                         Type[] itfs = o.GetType ().GetInterfaces ();
 200                         foreach (Type itf in itfs) {
 201                                 if (itf.IsImport && co.GetInterface (itf) == IntPtr.Zero)
 202                                         throw new InvalidCastException ();
 203                         }
 204
 205                         return ComInteropProxy.GetProxy (co.IUnknown, t).GetTransparentProxy ();
 206                 }
 207 #endif
 208
 209                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 210                 [ComVisible (true)]
 211                 public extern static void DestroyStructure (IntPtr ptr, Type structuretype);
 212
 213                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 214                 public extern static void FreeBSTR (IntPtr ptr);
 215
 216                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 217                 public extern static void FreeCoTaskMem (IntPtr ptr);
 218
 219                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 220                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 221                 public extern static void FreeHGlobal (IntPtr hglobal);
 222
 223                 static void ClearBSTR (IntPtr ptr)
 224                 {
 225                         int len = ReadInt32 (ptr, -4);
 226
 227                         for (int i = 0; i < len; i++)
 228                                 WriteByte (ptr, i, 0);
 229                 }
 230
 231                 public static void ZeroFreeBSTR (IntPtr s)
 232                 {
 233                         ClearBSTR (s);
 234                         FreeBSTR (s);
 235                 }
 236
 237                 static void ClearAnsi (IntPtr ptr)
 238                 {
 239                         for (int i = 0; ReadByte (ptr, i) != 0; i++)
 240                                 WriteByte (ptr, i, 0);
 241                 }
 242
 243                 static void ClearUnicode (IntPtr ptr)
 244                 {
 245                         for (int i = 0; ReadInt16 (ptr, i) != 0; i += 2)
 246                                 WriteInt16 (ptr, i, 0);
 247                 }
 248
 249                 public static void ZeroFreeCoTaskMemAnsi (IntPtr s)
 250                 {
 251                         ClearAnsi (s);
 252                         FreeCoTaskMem (s);
 253                 }
 254
 255                 public static void ZeroFreeCoTaskMemUnicode (IntPtr s)
 256                 {
 257                         ClearUnicode (s);
 258                         FreeCoTaskMem (s);
 259                 }
 260
 261                 public static void ZeroFreeGlobalAllocAnsi (IntPtr s)
 262                 {
 263                         ClearAnsi (s);
 264                         FreeHGlobal (s);
 265                 }
 266
 267                 public static void ZeroFreeGlobalAllocUnicode (IntPtr s)
 268                 {
 269                         ClearUnicode (s);
 270                         FreeHGlobal (s);
 271                 }
 272
 273 #if !FULL_AOT_RUNTIME
 274                 public static Guid GenerateGuidForType (Type type)
 275                 {
 276                         return type.GUID;
 277                 }
 278
 279                 public static string GenerateProgIdForType (Type type)
 280                 {
 281                         IList<CustomAttributeData> attrs = CustomAttributeData.GetCustomAttributes (type);
 282
 283                         foreach (var a in attrs)
 284                         {
 285                                 var dt = a.Constructor.DeclaringType;
 286                                 string name = dt.Name;
 287                                 if (name == "ProgIdAttribute")
 288                                 {
 289                                         var args = a.ConstructorArguments;
 290                                         string text = a.ConstructorArguments[0].Value as string;
 291                                         if (text == null)
 292                                         {
 293                                                 text = string.Empty;
 294                                         }
 295                                         return text;
 296                                 }
 297                         }
 298
 299                         return type.FullName;
 300                 }
 301
 302                 [MonoTODO]
 303                 public static object GetActiveObject (string progID)
 304                 {
 305                         throw new NotImplementedException ();
 306                 }
 307
 308 #if !MOBILE
 309                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 310                 private extern static IntPtr GetCCW (object o, Type T);
 311
 312                 private static IntPtr GetComInterfaceForObjectInternal (object o, Type T)
 313                 {
 314                         if (IsComObject (o))
 315                                 return ((__ComObject)o).GetInterface (T);
 316                         else
 317                                 return GetCCW (o, T);
 318                 }
 319 #endif
 320
 321                 public static IntPtr GetComInterfaceForObject (object o, Type T)
 322                 {
 323 #if !MOBILE
 324                         IntPtr pItf = GetComInterfaceForObjectInternal (o, T);
 325                         AddRef (pItf);
 326                         return pItf;
 327 #else
 328                         throw new NotImplementedException ();
 329 #endif
 330                 }
 331
 332                 [MonoTODO]
 333                 public static IntPtr GetComInterfaceForObjectInContext (object o, Type t)
 334                 {
 335                         throw new NotImplementedException ();
 336                 }
 337
 338                 [MonoNotSupportedAttribute ("MSDN states user code should never need to call this method.")]
 339                 public static object GetComObjectData (object obj, object key)
 340                 {
 341                         throw new NotSupportedException ("MSDN states user code should never need to call this method.");
 342                 }
 343
 344 #if !MOBILE
 345                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 346                 private extern static int GetComSlotForMethodInfoInternal (MemberInfo m);
 347 #endif
 348
 349                 public static int GetComSlotForMethodInfo (MemberInfo m)
 350                 {
 351 #if !MOBILE
 352                         if (m == null)
 353                                 throw new ArgumentNullException ("m");
 354                         if (!(m is MethodInfo))
 355                                 throw new ArgumentException ("The MemberInfo must be an interface method.", "m");
 356                         if (!m.DeclaringType.IsInterface)
 357                                 throw new ArgumentException ("The MemberInfo must be an interface method.", "m");
 358                         return GetComSlotForMethodInfoInternal (m);
 359 #else
 360                         throw new NotImplementedException ();
 361 #endif
 362                 }
 363
 364                 [MonoTODO]
 365                 public static int GetEndComSlot (Type t)
 366                 {
 367                         throw new NotImplementedException ();
 368                 }
 369
 370                 [MonoTODO]
 371                 public static int GetExceptionCode()
 372                 {
 373                         throw new NotImplementedException ();
 374                 }
 375
 376                 [MonoTODO]
 377                 [ComVisible (true)]
 378                 public static IntPtr GetExceptionPointers()
 379                 {
 380                         throw new NotImplementedException ();
 381                 }
 382
 383                 public static IntPtr GetHINSTANCE (Module m)
 384                 {
 385                         if (m == null)
 386                                 throw new ArgumentNullException ("m");
 387
 388                         return m.GetHINSTANCE ();
 389                 }
 390 #endif // !FULL_AOT_RUNTIME
 391
 392 #if !FULL_AOT_RUNTIME
 393                 [MonoTODO ("SetErrorInfo")]
 394                 public static int GetHRForException (Exception e)
 395                 {
 396                         return e.hresult;
 397                 }
 398
 399                 [MonoTODO]
 400                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
 401                 public static int GetHRForLastWin32Error()
 402                 {
 403                         throw new NotImplementedException ();
 404                 }
 405
 406                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 407                 private extern static IntPtr GetIDispatchForObjectInternal (object o);
 408
 409                 public static IntPtr GetIDispatchForObject (object o)
 410                 {
 411                         IntPtr pUnk = GetIDispatchForObjectInternal (o);
 412                         // Internal method does not AddRef
 413                         AddRef (pUnk);
 414                         return pUnk;
 415                 }
 416
 417                 [MonoTODO]
 418                 public static IntPtr GetIDispatchForObjectInContext (object o)
 419                 {
 420                         throw new NotImplementedException ();
 421                 }
 422
 423                 [MonoTODO]
 424                 public static IntPtr GetITypeInfoForType (Type t)
 425                 {
 426                         throw new NotImplementedException ();
 427                 }
 428
 429                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 430                 private extern static IntPtr GetIUnknownForObjectInternal (object o);
 431
 432                 public static IntPtr GetIUnknownForObject (object o)
 433                 {
 434                         IntPtr pUnk = GetIUnknownForObjectInternal (o);
 435                         // Internal method does not AddRef
 436                         AddRef (pUnk);
 437                         return pUnk;
 438                 }
 439
 440                 [MonoTODO]
 441                 public static IntPtr GetIUnknownForObjectInContext (object o)
 442                 {
 443                         throw new NotImplementedException ();
 444                 }
 445
 446                 [MonoTODO]
 447                 [Obsolete ("This method has been deprecated")]
 448                 public static IntPtr GetManagedThunkForUnmanagedMethodPtr (IntPtr pfnMethodToWrap, IntPtr pbSignature, int cbSignature)
 449                 {
 450                         throw new NotImplementedException ();
 451                 }
 452
 453                 [MonoTODO]
 454                 public static MemberInfo GetMethodInfoForComSlot (Type t, int slot, ref ComMemberType memberType)
 455                 {
 456                         throw new NotImplementedException ();
 457                 }
 458
 459                 public static void GetNativeVariantForObject (object obj, IntPtr pDstNativeVariant)
 460                 {
 461                         Variant vt = new Variant();
 462                         vt.SetValue(obj);
 463                         Marshal.StructureToPtr(vt, pDstNativeVariant, false);
 464                 }
 465
 466 #if !MOBILE
 467                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 468                 private static extern object GetObjectForCCW (IntPtr pUnk);
 469 #endif
 470
 471                 public static object GetObjectForIUnknown (IntPtr pUnk)
 472                 {
 473 #if !MOBILE
 474                         object obj = GetObjectForCCW (pUnk);
 475                         // was not a CCW
 476                         if (obj == null) {
 477                                 ComInteropProxy proxy = ComInteropProxy.GetProxy (pUnk, typeof (__ComObject));
 478                                 obj = proxy.GetTransparentProxy ();
 479                         }
 480                         return obj;
 481 #else
 482                         throw new NotImplementedException ();
 483 #endif
 484                 }
 485
 486                 public static object GetObjectForNativeVariant (IntPtr pSrcNativeVariant)
 487                 {
 488                         Variant vt = (Variant)Marshal.PtrToStructure(pSrcNativeVariant, typeof(Variant));
 489                         return vt.GetValue();
 490                 }
 491
 492                 public static object[] GetObjectsForNativeVariants (IntPtr aSrcNativeVariant, int cVars)
 493                 {
 494                         if (cVars < 0)
 495                                 throw new ArgumentOutOfRangeException ("cVars", "cVars cannot be a negative number.");
 496                         object[] objects = new object[cVars];
 497                         for (int i = 0; i < cVars; i++)
 498                                 objects[i] = GetObjectForNativeVariant ((IntPtr)(aSrcNativeVariant.ToInt64 () +
 499                                         i * SizeOf (typeof(Variant))));
 500                         return objects;
 501                 }
 502
 503                 [MonoTODO]
 504                 public static int GetStartComSlot (Type t)
 505                 {
 506                         throw new NotImplementedException ();
 507                 }
 508
 509                 [MonoTODO]
 510                 [Obsolete ("This method has been deprecated")]
 511                 public static Thread GetThreadFromFiberCookie (int cookie)
 512                 {
 513                         throw new NotImplementedException ();
 514                 }
 515
 516                 public static object GetTypedObjectForIUnknown (IntPtr pUnk, Type t)
 517                 {
 518                         ComInteropProxy proxy = new ComInteropProxy (pUnk, t);
 519                         __ComObject co = (__ComObject)proxy.GetTransparentProxy ();
 520                         foreach (Type itf in t.GetInterfaces ()) {
 521                                 if ((itf.Attributes & TypeAttributes.Import) == TypeAttributes.Import) {
 522                                         if (co.GetInterface (itf) == IntPtr.Zero)
 523                                                 return null;
 524                                 }
 525                         }
 526                         return co;
 527                 }
 528
 529                 [MonoTODO]
 530                 public static Type GetTypeForITypeInfo (IntPtr piTypeInfo)
 531                 {
 532                         throw new NotImplementedException ();
 533                 }
 534
 535 #if !FULL_AOT_RUNTIME
 536                 [Obsolete]
 537                 [MonoTODO]
 538                 public static string GetTypeInfoName (UCOMITypeInfo pTI)
 539                 {
 540                         throw new NotImplementedException ();
 541                 }
 542
 543                 public static string GetTypeInfoName (ITypeInfo typeInfo)
 544                 {
 545                         throw new NotImplementedException ();
 546                 }
 547
 548                 [Obsolete]
 549                 [MonoTODO]
 550                 public static Guid GetTypeLibGuid (UCOMITypeLib pTLB)
 551                 {
 552                         throw new NotImplementedException ();
 553                 }
 554
 555                 [MonoTODO]
 556                 public static Guid GetTypeLibGuid (ITypeLib typelib)
 557                 {
 558                         throw new NotImplementedException ();
 559                 }
 560
 561                 [MonoTODO]
 562                 public static Guid GetTypeLibGuidForAssembly (Assembly asm)
 563                 {
 564                         throw new NotImplementedException ();
 565                 }
 566
 567                 [Obsolete]
 568                 [MonoTODO]
 569                 public static int GetTypeLibLcid (UCOMITypeLib pTLB)
 570                 {
 571                         throw new NotImplementedException ();
 572                 }
 573
 574                 [MonoTODO]
 575                 public static int GetTypeLibLcid (ITypeLib typelib)
 576                 {
 577                         throw new NotImplementedException ();
 578                 }
 579
 580                 [Obsolete]
 581                 [MonoTODO]
 582                 public static string GetTypeLibName (UCOMITypeLib pTLB)
 583                 {
 584                         throw new NotImplementedException ();
 585                 }
 586
 587                 [MonoTODO]
 588                 public static string GetTypeLibName (ITypeLib typelib)
 589                 {
 590                         throw new NotImplementedException ();
 591                 }
 592
 593                 [MonoTODO]
 594                 public static void GetTypeLibVersionForAssembly (Assembly inputAssembly, out int majorVersion, out int minorVersion)
 595                 {
 596                         throw new NotImplementedException ();
 597                 }
 598
 599                 public static object GetUniqueObjectForIUnknown (IntPtr unknown)
 600                 {
 601                         throw new NotImplementedException ();
 602                 }
 603 #endif
 604
 605                 [MonoTODO]
 606                 [Obsolete ("This method has been deprecated")]
 607                 public static IntPtr GetUnmanagedThunkForManagedMethodPtr (IntPtr pfnMethodToWrap, IntPtr pbSignature, int cbSignature)
 608                 {
 609                         throw new NotImplementedException ();
 610                 }
 611
 612 #if !MOBILE
 613                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 614                 public extern static bool IsComObject (object o);
 615 #else
 616                 public static bool IsComObject (object o)
 617                 {
 618                         throw new NotImplementedException ();
 619                 }
 620 #endif
 621
 622                 [MonoTODO]
 623                 public static bool IsTypeVisibleFromCom (Type t)
 624                 {
 625                         throw new NotImplementedException ();
 626                 }
 627
 628                 [MonoTODO]
 629                 public static int NumParamBytes (MethodInfo m)
 630                 {
 631                         throw new NotImplementedException ();
 632                 }
 633 #endif
 634
 635                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 636                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 637                 public static extern int GetLastWin32Error();
 638
 639                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 640                 public extern static IntPtr OffsetOf (Type t, string fieldName);
 641
 642                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 643                 public extern static void Prelink (MethodInfo m);
 644
 645                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 646                 public extern static void PrelinkAll (Type c);
 647
 648                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 649                 public extern static string PtrToStringAnsi (IntPtr ptr);
 650
 651                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 652                 public extern static string PtrToStringAnsi (IntPtr ptr, int len);
 653
 654                 public static string PtrToStringAuto (IntPtr ptr)
 655                 {
 656                         return SystemDefaultCharSize == 2
 657                                 ? PtrToStringUni (ptr) : PtrToStringAnsi (ptr);
 658                 }
 659
 660                 public static string PtrToStringAuto (IntPtr ptr, int len)
 661                 {
 662                         return SystemDefaultCharSize == 2
 663                                 ? PtrToStringUni (ptr, len) : PtrToStringAnsi (ptr, len);
 664                 }
 665
 666                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 667                 public extern static string PtrToStringUni (IntPtr ptr);
 668
 669                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 670                 public extern static string PtrToStringUni (IntPtr ptr, int len);
 671
 672 #if !MOBILE
 673                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 674                 public extern static string PtrToStringBSTR (IntPtr ptr);
 675 #else
 676                 public static string PtrToStringBSTR (IntPtr ptr)
 677                 {
 678                         throw new NotImplementedException ();
 679                 }
 680 #endif
 681
 682                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 683                 [ComVisible (true)]
 684                 public extern static void PtrToStructure (IntPtr ptr, object structure);
 685
 686                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 687                 [ComVisible (true)]
 688                 public extern static object PtrToStructure (IntPtr ptr, Type structureType);
 689
 690 #if !MOBILE
 691                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 692                 private extern static int QueryInterfaceInternal (IntPtr pUnk, ref Guid iid, out IntPtr ppv);
 693 #endif
 694
 695                 public static int QueryInterface (IntPtr pUnk, ref Guid iid, out IntPtr ppv)
 696                 {
 697 #if !MOBILE
 698                         if (pUnk == IntPtr.Zero)
 699                                 throw new ArgumentException ("Value cannot be null.", "pUnk");
 700                         return QueryInterfaceInternal (pUnk, ref iid, out ppv);
 701 #else
 702                         throw new NotImplementedException ();
 703 #endif
 704                 }
 705
 706                 public static byte ReadByte (IntPtr ptr)
 707                 {
 708                         return ReadByte (ptr, 0);
 709                 }
 710
 711                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 712                 public extern static byte ReadByte (IntPtr ptr, int ofs);
 713
 714                 [MonoTODO]
 715                 [SuppressUnmanagedCodeSecurity]
 716                 public static byte ReadByte ([In, MarshalAs (UnmanagedType.AsAny)] object ptr, int ofs)
 717                 {
 718                         throw new NotImplementedException ();
 719                 }
 720
 721                 public static short ReadInt16 (IntPtr ptr)
 722                 {
 723                         return ReadInt16 (ptr, 0);
 724                 }
 725
 726                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 727                 public extern static short ReadInt16 (IntPtr ptr, int ofs);
 728
 729                 [MonoTODO]
 730                 [SuppressUnmanagedCodeSecurity]
 731                 public static short ReadInt16 ([In, MarshalAs(UnmanagedType.AsAny)] object ptr, int ofs)
 732                 {
 733                         throw new NotImplementedException ();
 734                 }
 735
 736                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 737                 public static int ReadInt32 (IntPtr ptr)
 738                 {
 739                         return ReadInt32 (ptr, 0);
 740                 }
 741
 742                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 743                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 744                 public extern static int ReadInt32 (IntPtr ptr, int ofs);
 745
 746                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 747                 [MonoTODO]
 748                 [SuppressUnmanagedCodeSecurity]
 749                 public static int ReadInt32 ([In, MarshalAs(UnmanagedType.AsAny)] object ptr, int ofs)
 750                 {
 751                         throw new NotImplementedException ();
 752                 }
 753
 754                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 755                 public static long ReadInt64 (IntPtr ptr)
 756                 {
 757                         return ReadInt64 (ptr, 0);
 758                 }
 759
 760                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 761                 public extern static long ReadInt64 (IntPtr ptr, int ofs);
 762
 763                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 764                 [MonoTODO]
 765                 [SuppressUnmanagedCodeSecurity]
 766                 public static long ReadInt64 ([In, MarshalAs (UnmanagedType.AsAny)] object ptr, int ofs)
 767                 {
 768                         throw new NotImplementedException ();
 769                 }
 770
 771                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 772                 public static IntPtr ReadIntPtr (IntPtr ptr)
 773                 {
 774                         return ReadIntPtr (ptr, 0);
 775                 }
 776
 777                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 778                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 779                 public extern static IntPtr ReadIntPtr (IntPtr ptr, int ofs);
 780
 781                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 782                 [MonoTODO]
 783                 public static IntPtr ReadIntPtr ([In, MarshalAs (UnmanagedType.AsAny)] object ptr, int ofs)
 784                 {
 785                         throw new NotImplementedException ();
 786                 }
 787
 788                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 789                 public extern static IntPtr ReAllocCoTaskMem (IntPtr pv, int cb);
 790
 791                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 792                 public extern static IntPtr ReAllocHGlobal (IntPtr pv, IntPtr cb);
 793
 794 #if !MOBILE
 795                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 796                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 797                 private extern static int ReleaseInternal (IntPtr pUnk);
 798 #endif
 799
 800                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
 801                 public static int Release (IntPtr pUnk)
 802                 {
 803 #if !MOBILE
 804                         if (pUnk == IntPtr.Zero)
 805                                 throw new ArgumentException ("Value cannot be null.", "pUnk");
 806
 807                         return ReleaseInternal (pUnk);
 808 #else
 809                         throw new NotImplementedException ();
 810 #endif
 811                 }
 812
 813 #if !FULL_AOT_RUNTIME
 814                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 815                 private extern static int ReleaseComObjectInternal (object co);
 816
 817                 public static int ReleaseComObject (object o)
 818                 {
 819                         if (o == null)
 820                                 throw new ArgumentException ("Value cannot be null.", "o");
 821                         if (!IsComObject (o))
 822                                 throw new ArgumentException ("Value must be a Com object.", "o");
 823                         return ReleaseComObjectInternal (o);
 824                 }
 825
 826                 [Obsolete]
 827                 [MonoTODO]
 828                 public static void ReleaseThreadCache()
 829                 {
 830                         throw new NotImplementedException ();
 831                 }
 832
 833                 [MonoNotSupportedAttribute ("MSDN states user code should never need to call this method.")]
 834                 public static bool SetComObjectData (object obj, object key, object data)
 835                 {
 836                         throw new NotSupportedException ("MSDN states user code should never need to call this method.");
 837                 }
 838 #endif
 839
 840                 [ComVisible (true)]
 841                 public static int SizeOf (object structure)
 842                 {
 843                         return SizeOf (structure.GetType ());
 844                 }
 845
 846                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 847                 public extern static int SizeOf (Type t);
 848
 849                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 850                 public extern static IntPtr StringToBSTR (string s);
 851
 852                 //
 853                 // I believe this is wrong, because in Mono and in P/Invoke
 854                 // we treat "Ansi" conversions as UTF-8 conversions, while
 855                 // this one does not do this
 856                 //
 857                 public static IntPtr StringToCoTaskMemAnsi (string s)
 858                 {
 859                         int length = s.Length + 1;
 860                         IntPtr ctm = AllocCoTaskMem (length);
 861
 862                         byte[] asBytes = new byte[length];
 863                         for (int i = 0; i < s.Length; i++)
 864                                 asBytes[i] = (byte)s[i];
 865                         asBytes[s.Length] = 0;
 866
 867                         copy_to_unmanaged (asBytes, 0, ctm, length);
 868                         return ctm;
 869                 }
 870
 871                 public static IntPtr StringToCoTaskMemAuto (string s)
 872                 {
 873                         return SystemDefaultCharSize == 2
 874                                 ? StringToCoTaskMemUni (s) : StringToCoTaskMemAnsi (s);
 875                 }
 876
 877                 public static IntPtr StringToCoTaskMemUni (string s)
 878                 {
 879                         int length = s.Length + 1;
 880                         IntPtr ctm = AllocCoTaskMem (length * 2);
 881
 882                         char[] asChars = new char[length];
 883                         s.CopyTo (0, asChars, 0, s.Length);
 884                         asChars[s.Length] = '\0';
 885
 886                         copy_to_unmanaged (asChars, 0, ctm, length);
 887                         return ctm;
 888                 }
 889
 890                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 891                 public extern static IntPtr StringToHGlobalAnsi (string s);
 892
 893                 public static IntPtr StringToHGlobalAuto (string s)
 894                 {
 895                         return SystemDefaultCharSize == 2
 896                                 ? StringToHGlobalUni (s) : StringToHGlobalAnsi (s);
 897                 }
 898
 899                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 900                 public extern static IntPtr StringToHGlobalUni (string s);
 901
 902                 public static IntPtr SecureStringToBSTR (SecureString s)
 903                 {
 904                         if (s == null)
 905                                 throw new ArgumentNullException ("s");
 906                         int len = s.Length;
 907                         IntPtr ctm = AllocCoTaskMem ((len+1) * 2 + 4);
 908                         byte [] buffer = null;
 909                         WriteInt32 (ctm, 0, len*2);
 910                         try {
 911                                 buffer = s.GetBuffer ();
 912
 913                                 for (int i = 0; i < len; i++)
 914                                         WriteInt16 (ctm, 4 + (i * 2), (short) ((buffer [(i*2)] << 8) | (buffer [i*2+1])));
 915                                 WriteInt16 (ctm, 4 + buffer.Length, 0);
 916                         } finally {
 917                                 if (buffer != null)
 918                                         for (int i = buffer.Length; i > 0; ){
 919                                                 i--;
 920                                                 buffer [i] = 0;
 921                                         }
 922                         }
 923                         return (IntPtr) ((long)ctm + 4);
 924                 }
 925
 926                 public static IntPtr SecureStringToCoTaskMemAnsi (SecureString s)
 927                 {
 928                         if (s == null)
 929                                 throw new ArgumentNullException ("s");
 930                         int len = s.Length;
 931                         IntPtr ctm = AllocCoTaskMem (len + 1);
 932                         byte [] copy = new byte [len+1];
 933
 934                         try {
 935                                 byte [] buffer = s.GetBuffer ();
 936                                 int i = 0, j = 0;
 937                                 for (; i < len; i++, j += 2){
 938                                         copy [i] = buffer [j+1];
 939                                         buffer [j] = 0;
 940                                         buffer [j+1] = 0;
 941                                 }
 942                                 copy [i] = 0;
 943                                 copy_to_unmanaged (copy, 0, ctm, len+1);
 944                         } finally {
 945                                 // Ensure that we clear the buffer.
 946                                 for (int i = len; i > 0; ){
 947                                         i--;
 948                                         copy [i] = 0;
 949                                 }
 950                         }
 951                         return ctm;
 952                 }
 953
 954                 public static IntPtr SecureStringToCoTaskMemUnicode (SecureString s)
 955                 {
 956                         if (s == null)
 957                                 throw new ArgumentNullException ("s");
 958                         int len = s.Length;
 959                         IntPtr ctm = AllocCoTaskMem (len * 2 + 2);
 960                         byte [] buffer = null;
 961                         try {
 962                                 buffer = s.GetBuffer ();
 963                                 for (int i = 0; i < len; i++)
 964                                         WriteInt16 (ctm, i * 2, (short) ((buffer [(i*2)] << 8) | (buffer [i*2+1])));
 965                                 WriteInt16 (ctm, buffer.Length, 0);
 966                         } finally {
 967                                 if (buffer != null)
 968                                         for (int i = buffer.Length; i > 0; ){
 969                                                 i--;
 970                                                 buffer [i] = 0;
 971                                         }
 972                         }
 973                         return ctm;
 974                 }
 975
 976                 public static IntPtr SecureStringToGlobalAllocAnsi (SecureString s)
 977                 {
 978                         if (s == null)
 979                                 throw new ArgumentNullException ("s");
 980                         return SecureStringToCoTaskMemAnsi (s);
 981                 }
 982
 983                 public static IntPtr SecureStringToGlobalAllocUnicode (SecureString s)
 984                 {
 985                         if (s == null)
 986                                 throw new ArgumentNullException ("s");
 987                         return SecureStringToCoTaskMemUnicode (s);
 988                 }
 989
 990                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
 991                 [ComVisible (true)]
 992                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 993                 public extern static void StructureToPtr (object structure, IntPtr ptr, bool fDeleteOld);
 994
 995                 public static void ThrowExceptionForHR (int errorCode) {
 996                         Exception ex = GetExceptionForHR (errorCode);
 997                         if (ex != null)
 998                                 throw ex;
 999                 }
1000
1001                 public static void ThrowExceptionForHR (int errorCode, IntPtr errorInfo) {
1002                         Exception ex = GetExceptionForHR (errorCode, errorInfo);
1003                         if (ex != null)
1004                                 throw ex;
1005                 }
1006
1007                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1008                 public extern static IntPtr UnsafeAddrOfPinnedArrayElement (Array arr, int index);
1009
1010                 public static void WriteByte (IntPtr ptr, byte val)
1011                 {
1012                         WriteByte (ptr, 0, val);
1013                 }
1014
1015                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1016                 public extern static void WriteByte (IntPtr ptr, int ofs, byte val);
1017
1018                 [MonoTODO]
1019                 [SuppressUnmanagedCodeSecurity]
1020                 public static void WriteByte ([In, Out, MarshalAs (UnmanagedType.AsAny)] object ptr, int ofs, byte val)
1021                 {
1022                         throw new NotImplementedException ();
1023                 }
1024
1025                 public static void WriteInt16 (IntPtr ptr, short val)
1026                 {
1027                         WriteInt16 (ptr, 0, val);
1028                 }
1029
1030                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1031                 public extern static void WriteInt16 (IntPtr ptr, int ofs, short val);
1032
1033                 [MonoTODO]
1034                 [SuppressUnmanagedCodeSecurity]
1035                 public static void WriteInt16 ([In, Out, MarshalAs (UnmanagedType.AsAny)] object ptr, int ofs, short val)
1036                 {
1037                         throw new NotImplementedException ();
1038                 }
1039
1040                 public static void WriteInt16 (IntPtr ptr, char val)
1041                 {
1042                         WriteInt16 (ptr, 0, val);
1043                 }
1044
1045                 [MonoTODO]
1046                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1047                 public extern static void WriteInt16 (IntPtr ptr, int ofs, char val);
1048
1049                 [MonoTODO]
1050                 public static void WriteInt16([In, Out] object ptr, int ofs, char val)
1051                 {
1052                         throw new NotImplementedException ();
1053                 }
1054
1055                 public static void WriteInt32 (IntPtr ptr, int val)
1056                 {
1057                         WriteInt32 (ptr, 0, val);
1058                 }
1059
1060                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1061                 public extern static void WriteInt32 (IntPtr ptr, int ofs, int val);
1062
1063                 [MonoTODO]
1064                 [SuppressUnmanagedCodeSecurity]
1065                 public static void WriteInt32([In, Out, MarshalAs(UnmanagedType.AsAny)] object ptr, int ofs, int val)
1066                 {
1067                         throw new NotImplementedException ();
1068                 }
1069
1070                 public static void WriteInt64 (IntPtr ptr, long val)
1071                 {
1072                         WriteInt64 (ptr, 0, val);
1073                 }
1074
1075                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1076                 public extern static void WriteInt64 (IntPtr ptr, int ofs, long val);
1077
1078                 [MonoTODO]
1079                 [SuppressUnmanagedCodeSecurity]
1080                 public static void WriteInt64 ([In, Out, MarshalAs (UnmanagedType.AsAny)] object ptr, int ofs, long val)
1081                 {
1082                         throw new NotImplementedException ();
1083                 }
1084
1085                 public static void WriteIntPtr (IntPtr ptr, IntPtr val)
1086                 {
1087                         WriteIntPtr (ptr, 0, val);
1088                 }
1089
1090                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1091                 public extern static void WriteIntPtr (IntPtr ptr, int ofs, IntPtr val);
1092
1093                 [MonoTODO]
1094                 public static void WriteIntPtr([In, Out, MarshalAs(UnmanagedType.AsAny)] object ptr, int ofs, IntPtr val)
1095                 {
1096                         throw new NotImplementedException ();
1097                 }
1098
1099                 public static Exception GetExceptionForHR (int errorCode) {
1100                         return GetExceptionForHR (errorCode, IntPtr.Zero);
1101                 }
1102
1103                 public static Exception GetExceptionForHR (int errorCode, IntPtr errorInfo) {
1104
1105                         const int E_OUTOFMEMORY = unchecked ((int)0x8007000EL);
1106                         const int E_INVALIDARG = unchecked ((int)0X80070057);
1107
1108                         switch (errorCode)
1109                         {
1110                         case E_OUTOFMEMORY:
1111                                 return new OutOfMemoryException ();
1112                         case E_INVALIDARG:
1113                                 return new ArgumentException ();
1114                         }
1115                         if (errorCode < 0)
1116                                 return new COMException ("", errorCode);
1117                         return null;
1118                 }
1119
1120 #if !FULL_AOT_RUNTIME
1121                 public static int FinalReleaseComObject (object o)
1122                 {
1123                         while (ReleaseComObject (o) != 0);
1124                         return 0;
1125                 }
1126 #endif
1127
1128                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1129                 private static extern Delegate GetDelegateForFunctionPointerInternal (IntPtr ptr, Type t);
1130
1131                 public static Delegate GetDelegateForFunctionPointer (IntPtr ptr, Type t)
1132                 {
1133                         if (t == null)
1134                                 throw new ArgumentNullException ("t");
1135                         if (!t.IsSubclassOf (typeof (MulticastDelegate)) || (t == typeof (MulticastDelegate)))
1136                                 throw new ArgumentException ("Type is not a delegate", "t");
1137                         if (t.IsGenericType)
1138                                 throw new ArgumentException ("The specified Type must not be a generic type definition.");
1139                         if (ptr == IntPtr.Zero)
1140                                 throw new ArgumentNullException ("ptr");
1141
1142                         return GetDelegateForFunctionPointerInternal (ptr, t);
1143                 }
1144
1145                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1146                 private static extern IntPtr GetFunctionPointerForDelegateInternal (Delegate d);
1147
1148                 public static IntPtr GetFunctionPointerForDelegate (Delegate d)
1149                 {
1150                         if (d == null)
1151                                 throw new ArgumentNullException ("d");
1152
1153                         return GetFunctionPointerForDelegateInternal (d);
1154                 }
1155         }
1156 }