mcs/class/corlib/System.Runtime.Remoting.Messaging/MonoMethodMessage.cs

   1 //
   2 // System.Runtime.Remoting.Messaging.MonoMethodMessage.cs
   3 //
   4 // Author:
   5 //   Dietmar Maurer (dietmar@ximian.com)
   6 //   Patrik Torstensson
   7 //
   8 // (C) Ximian, Inc.  http://www.ximian.com
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Collections;
  36 using System.Reflection;
  37 using System.Runtime.CompilerServices;
  38 using System.Runtime.InteropServices;
  39
  40 namespace System.Runtime.Remoting.Messaging {
  41
  42         [Serializable]
  43         [StructLayout (LayoutKind.Sequential)]
  44         internal class MonoMethodMessage : IMethodCallMessage, IMethodReturnMessage, IInternalMessage {
  45
  46 #pragma warning disable 649
  47                 #region keep in sync with MonoMessage in object-internals.h
  48                 MonoMethod method;
  49                 object []  args;
  50                 string []  names;
  51                 byte [] arg_types; /* 1 == IN; 2 == OUT; 3 == INOUT; 4 == COPY OUT */
  52                 public LogicalCallContext ctx;
  53                 public object rval;
  54                 public Exception exc;
  55                 AsyncResult asyncResult;
  56                 CallType call_type;
  57                 #endregion
  58 #pragma warning restore 649
  59
  60                 string uri;
  61
  62                 MCMDictionary properties;
  63
  64                 Type[] methodSignature;
  65
  66                 Identity identity;
  67
  68                 internal static String CallContextKey = "__CallContext";
  69                 internal static String UriKey           = "__Uri";
  70
  71                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  72                 internal extern void InitMessage (MonoMethod method, object [] out_args);
  73
  74                 public MonoMethodMessage (MethodBase method, object [] out_args)
  75                 {
  76                         if (method != null)
  77                                 InitMessage ((MonoMethod)method, out_args);
  78                         else
  79                                 args = null;
  80                 }
  81
  82                 public MonoMethodMessage (Type type, string method_name, object [] in_args)
  83                 {
  84                         // fixme: consider arg types
  85                         MethodInfo minfo = type.GetMethod (method_name);
  86
  87                         InitMessage ((MonoMethod)minfo, null);
  88
  89                         int len = in_args.Length;
  90                         for (int i = 0; i < len; i++) {
  91                                 args [i] = in_args [i];
  92                         }
  93                 }
  94
  95                 public IDictionary Properties {
  96                         get {
  97                                 if (properties == null) properties = new MCMDictionary (this);
  98                                 return properties;
  99                         }
 100                 }
 101
 102                 public int ArgCount {
 103                         get {
 104                                 if (CallType == CallType.EndInvoke)
 105                                         return -1;
 106
 107                                 if (null == args)
 108                                         return 0;
 109
 110                                 return args.Length;
 111                         }
 112                 }
 113
 114                 public object [] Args {
 115                         get {
 116                                 return args;
 117                         }
 118                 }
 119
 120                 public bool HasVarArgs {
 121                         get {
 122                                 return false;
 123                         }
 124                 }
 125
 126                 public LogicalCallContext LogicalCallContext {
 127                         get {
 128                                 return ctx;
 129                         }
 130
 131                         set {
 132                                 ctx = value;
 133                         }
 134                 }
 135
 136                 public MethodBase MethodBase {
 137                         get {
 138                                 return method;
 139                         }
 140                 }
 141
 142                 public string MethodName {
 143                         get {
 144                                 if (null == method)
 145                                         return String.Empty;
 146
 147                                 return method.Name;
 148                         }
 149                 }
 150
 151                 public object MethodSignature {
 152                         get {
 153                                 if (methodSignature == null) {
 154                                         ParameterInfo[] parameters = method.GetParameters();
 155                                         methodSignature = new Type[parameters.Length];
 156                                         for (int n=0; n<parameters.Length; n++)
 157                                                 methodSignature[n] = parameters[n].ParameterType;
 158                                 }
 159                                 return methodSignature;
 160                         }
 161                 }
 162
 163                 public string TypeName {
 164                         get {
 165                                 if (null == method)
 166                                         return String.Empty;
 167
 168                                 return method.DeclaringType.AssemblyQualifiedName;
 169                         }
 170                 }
 171
 172                 public string Uri {
 173                         get {
 174                                 return uri;
 175                         }
 176
 177                         set {
 178                                 uri = value;
 179                         }
 180                 }
 181
 182                 public object GetArg (int arg_num)
 183                 {
 184                         if (null == args)
 185                                 return null;
 186
 187                         return args [arg_num];
 188                 }
 189
 190                 public string GetArgName (int arg_num)
 191                 {
 192                         if (null == args)
 193                                 return String.Empty;
 194
 195                         return names [arg_num];
 196                 }
 197
 198                 public int InArgCount {
 199                         get {
 200                                 if (CallType == CallType.EndInvoke)
 201                                         return -1;
 202
 203                                 if (null == args)
 204                                         return 0;
 205
 206                                 int count = 0;
 207
 208                                 foreach (byte t in arg_types) {
 209                                         if ((t & 1) != 0) count++;
 210
 211                                 }
 212                                 return count;
 213                         }
 214                 }
 215
 216                 public object [] InArgs {
 217                         get {
 218                                 int i, j, count = InArgCount;
 219                                 object [] inargs = new object [count];
 220
 221                                 i = j = 0;
 222                                 foreach (byte t in arg_types) {
 223                                         if ((t & 1) != 0)
 224                                                 inargs [j++] = args [i];
 225                                         i++;
 226                                 }
 227
 228                                 return inargs;
 229                         }
 230                 }
 231
 232                 public object GetInArg (int arg_num)
 233                 {
 234                         int i = 0, j = 0;
 235                         foreach (byte t in arg_types) {
 236                                 if ((t & 1) != 0) {
 237                                         if (j++ == arg_num)
 238                                                 return args [i];
 239                                 }
 240                                 i++;
 241                         }
 242                         return null;
 243                 }
 244
 245                 public string GetInArgName (int arg_num)
 246                 {
 247                         int i = 0, j = 0;
 248                         foreach (byte t in arg_types) {
 249                                 if ((t & 1) != 0) {
 250                                         if (j++ == arg_num)
 251                                                 return names [i];
 252                                 }
 253                                 i++;
 254                         }
 255                         return null;
 256                 }
 257
 258                 public Exception Exception {
 259                         get {
 260                                 return exc;
 261                         }
 262                 }
 263
 264                 public int OutArgCount {
 265                         get {
 266                                 if (null == args)
 267                                         return 0;
 268
 269                                 int count = 0;
 270
 271                                 foreach (byte t in arg_types) {
 272                                         if ((t & 2) != 0) count++;
 273
 274                                 }
 275                                 return count;
 276                         }
 277                 }
 278
 279                 public object [] OutArgs {
 280                         get {
 281                                 if (null == args)
 282                                         return null;
 283
 284                                 int i, j, count = OutArgCount;
 285                                 object [] outargs = new object [count];
 286
 287                                 i = j = 0;
 288                                 foreach (byte t in arg_types) {
 289                                         if ((t & 2) != 0)
 290                                                 outargs [j++] = args [i];
 291                                         i++;
 292                                 }
 293
 294                                 return outargs;
 295                         }
 296                 }
 297
 298                 public object ReturnValue {
 299                         get {
 300                                 return rval;
 301                         }
 302                 }
 303
 304                 public object GetOutArg (int arg_num)
 305                 {
 306                         int i = 0, j = 0;
 307                         foreach (byte t in arg_types) {
 308                                 if ((t & 2) != 0) {
 309                                         if (j++ == arg_num)
 310                                                 return args [i];
 311                                 }
 312                                 i++;
 313                         }
 314                         return null;
 315                 }
 316
 317                 public string GetOutArgName (int arg_num)
 318                 {
 319                         int i = 0, j = 0;
 320                         foreach (byte t in arg_types) {
 321                                 if ((t & 2) != 0) {
 322                                         if (j++ == arg_num)
 323                                                 return names [i];
 324                                 }
 325                                 i++;
 326                         }
 327                         return null;
 328                 }
 329
 330                 Identity IInternalMessage.TargetIdentity
 331                 {
 332                         get { return identity; }
 333                         set { identity = value; }
 334                 }
 335
 336                 bool IInternalMessage.HasProperties()
 337                 {
 338                         return properties != null;
 339                 }
 340
 341                 public bool IsAsync
 342                 {
 343                         get { return asyncResult != null; }
 344                 }
 345
 346                 public AsyncResult AsyncResult
 347                 {
 348                         get { return asyncResult; }
 349                 }
 350
 351                 internal CallType CallType
 352                 {
 353                         get
 354                         {
 355                                 // FIXME: ideally, the OneWay type would be set by the runtime
 356
 357                                 if (call_type == CallType.Sync && RemotingServices.IsOneWay (method))
 358                                         call_type = CallType.OneWay;
 359                                 return call_type;
 360                         }
 361                 }
 362
 363                 public bool NeedsOutProcessing (out int outCount) {
 364                         bool res = false;
 365                         outCount = 0;
 366                         foreach (byte t in arg_types) {
 367                                 if ((t & 2) != 0)
 368                                         outCount++;
 369                                 else if ((t & 4) != 0)
 370                                         res = true;
 371                         }
 372                         return outCount > 0 || res;
 373                 }
 374
 375         }
 376
 377         internal enum CallType: int
 378         {
 379                 Sync = 0,
 380                 BeginInvoke = 1,
 381                 EndInvoke = 2,
 382                 OneWay = 3
 383         }
 384 }
 385