mcs/class/corlib/System.Runtime.Remoting.Proxies/RealProxy.cs

   1 //
   2 // System.Runtime.Remoting.Proxies.RealProxy.cs
   3 //
   4 // Authors:
   5 //   Dietmar Maurer (dietmar@ximian.com)
   6 //   Lluis Sanchez (lsg@ctv.es)
   7 //   Patrik Torstensson
   8 //
   9 // (C) 2001 Ximian, Inc.  http://www.ximian.com
  10 //
  11
  12 using System;
  13 using System.Reflection;
  14 using System.Runtime.Remoting;
  15 using System.Runtime.Remoting.Messaging;
  16 using System.Runtime.Remoting.Activation;
  17 using System.Runtime.Remoting.Contexts;
  18 using System.Runtime.CompilerServices;
  19 using System.Runtime.Serialization;
  20
  21
  22 namespace System.Runtime.Remoting.Proxies
  23 {
  24         internal class TransparentProxy {
  25                 public RealProxy _rp;
  26                 IntPtr _class;
  27                 bool _custom_type_info;
  28         }
  29
  30         public abstract class RealProxy {
  31
  32                 Type class_to_proxy;
  33                 internal Context _targetContext;
  34                 MarshalByRefObject _server;
  35                 internal Identity _objectIdentity;
  36                 Object _objTP;
  37                 object _stubData;
  38
  39                 protected RealProxy ()
  40                 {
  41                         throw new NotImplementedException ();
  42                 }
  43
  44                 protected RealProxy (Type classToProxy) : this(classToProxy, (IntPtr) 0, null)
  45                 {
  46                 }
  47
  48                 internal RealProxy (Type classToProxy, ClientIdentity identity) : this(classToProxy, (IntPtr) 0, null)
  49                 {
  50                         _objectIdentity = identity;
  51                 }
  52
  53                 protected RealProxy (Type classToProxy, IntPtr stub, object stubData)
  54                 {
  55                         if (!classToProxy.IsMarshalByRef && !classToProxy.IsInterface)
  56                                 throw new ArgumentException("object must be MarshalByRef");
  57
  58                         this.class_to_proxy = classToProxy;
  59
  60                         // TODO: Fix stub
  61                         _objTP = InternalGetTransparentProxy();
  62                 }
  63
  64                 public Type GetProxiedType()
  65                 {
  66                         if (class_to_proxy.IsInterface) return typeof (MarshalByRefObject);
  67                         else return class_to_proxy;
  68                 }
  69
  70                 public virtual ObjRef CreateObjRef (Type requestedType)
  71                 {
  72                         return RemotingServices.Marshal ((MarshalByRefObject) GetTransparentProxy(), null, requestedType);
  73                 }
  74
  75                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
  76                 {
  77                         Object obj = GetTransparentProxy();\r
  78                         RemotingServices.GetObjectData (obj, info, context);            \r
  79                 }
  80
  81                 internal Identity ObjectIdentity
  82                 {
  83                         get { return _objectIdentity; }
  84                         set { _objectIdentity = value; }
  85                 }
  86
  87                 [MonoTODO]
  88                 public virtual IntPtr GetCOMIUnknown (bool fIsMarshalled)
  89                 {
  90                         throw new NotImplementedException ();
  91                 }
  92
  93                 [MonoTODO]
  94                 public virtual void SetCOMIUnknown (IntPtr i)
  95                 {
  96                         throw new NotImplementedException ();
  97                 }
  98
  99                 [MonoTODO]
 100                 public virtual IntPtr SupportsInterface (ref Guid iid)
 101                 {
 102                         throw new NotImplementedException ();
 103                 }
 104
 105                 public static object GetStubData (RealProxy rp)
 106                 {
 107                         return rp._stubData;
 108                 }
 109
 110                 public static void SetStubData (RealProxy rp, object stubData)
 111                 {
 112                         rp._stubData = stubData;
 113                 }
 114
 115                 public abstract IMessage Invoke (IMessage msg);
 116
 117                 /* this is called from unmanaged code */
 118                 internal static object PrivateInvoke (RealProxy rp, IMessage msg, out Exception exc,
 119                                                       out object [] out_args)
 120                 {
 121                         MonoMethodMessage mMsg = (MonoMethodMessage) msg;
 122                         mMsg.LogicalCallContext = CallContext.CreateLogicalCallContext();
 123
 124                         if (mMsg.CallType == CallType.BeginInvoke)
 125                                 mMsg.AsyncResult.CallMessage = mMsg;    // TODO: do this in the runtime
 126
 127                         IMethodReturnMessage res_msg = (IMethodReturnMessage)rp.Invoke (msg);
 128
 129                         if (res_msg.LogicalCallContext != null && res_msg.LogicalCallContext.HasInfo)
 130                                 CallContext.UpdateCurrentCallContext (res_msg.LogicalCallContext);
 131
 132                         exc = res_msg.Exception;
 133
 134                         // todo: remove throw exception from the runtime invoke
 135                         if (null != exc) {
 136                                 out_args = null;
 137                                 throw exc.FixRemotingException();
 138                         }
 139                         else if (res_msg is IConstructionReturnMessage || mMsg.CallType == CallType.BeginInvoke) {
 140                                 out_args = res_msg.OutArgs;
 141                         }
 142                         else if (mMsg.CallType == CallType.Sync) {
 143                                 out_args = ProcessResponse (res_msg, mMsg);
 144                         }
 145                         else if (mMsg.CallType == CallType.EndInvoke) {
 146                                 out_args = ProcessResponse (res_msg, mMsg.AsyncResult.CallMessage);
 147                         }
 148                         else {
 149                                 out_args = res_msg.OutArgs;
 150                         }
 151
 152                         return res_msg.ReturnValue;
 153                 }
 154
 155                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 156                 internal extern virtual object InternalGetTransparentProxy ();
 157
 158                 public virtual object GetTransparentProxy ()
 159                 {
 160                         return _objTP;
 161                 }
 162
 163                 [MonoTODO]
 164                 public IConstructionReturnMessage InitializeServerObject(IConstructionCallMessage ctorMsg)
 165                 {
 166                         throw new NotImplementedException();
 167                 }
 168
 169                 protected void AttachServer(MarshalByRefObject s)
 170                 {
 171                         _server = s;
 172                 }
 173
 174                 protected MarshalByRefObject DetachServer()
 175                 {
 176                         MarshalByRefObject ob = _server;
 177                         _server = null;
 178                         return ob;
 179                 }
 180
 181                 protected MarshalByRefObject GetUnwrappedServer()
 182                 {
 183                         return _server;
 184                 }
 185
 186                 static object[] ProcessResponse (IMethodReturnMessage mrm, IMethodCallMessage call)
 187                 {
 188                         // Check return type
 189
 190                         MethodInfo mi = (MethodInfo) call.MethodBase;
 191                         if (mrm.ReturnValue != null && !mi.ReturnType.IsInstanceOfType (mrm.ReturnValue))
 192                                 throw new RemotingException ("Return value has an invalid type");
 193
 194                         // Check out parameters
 195
 196                         if (mrm.OutArgCount > 0)
 197                         {
 198                                 ParameterInfo[] parameters = mi.GetParameters();
 199                                 int no = 0;
 200                                 foreach (ParameterInfo par in parameters)
 201                                         if (par.ParameterType.IsByRef) no++;
 202
 203                                 object[] outArgs = new object [no];
 204                                 int narg = 0;
 205                                 int nout = 0;
 206
 207                                 foreach (ParameterInfo par in parameters)
 208                                 {
 209                                         if (par.IsOut && !par.ParameterType.IsByRef)
 210                                         {
 211                                                 // Special marshalling required
 212
 213                                                 object outArg = mrm.GetOutArg (nout++);
 214                                                 if (outArg != null) {
 215                                                         object local = call.GetArg (par.Position);
 216                                                         if (local == null) throw new RemotingException ("Unexpected null value in local out parameter '" + par.Position + " " + par.Name + "'");
 217                                                         RemotingServices.UpdateOutArgObject (par, local, outArg);
 218                                                 }
 219                                         }
 220                                         else if (par.ParameterType.IsByRef)
 221                                         {
 222                                                 object outArg = mrm.GetOutArg (nout++);
 223                                                 if (outArg != null && !par.ParameterType.IsInstanceOfType (outArg))
 224                                                 {
 225                                                         throw new RemotingException ("Return argument '" + par.Name + "' has an invalid type");
 226                                                 }
 227                                                 outArgs [narg++] = outArg;
 228                                         }
 229                                 }
 230                                 return outArgs;
 231                         }
 232                         else
 233                                 return new object [0];
 234                 }
 235         }
 236 }