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

   1 //
   2 // System.Runtime.Remoting.StackBuilderSink.cs
   3 //
   4 // Author: Lluis Sanchez Gual (lsg@ctv.es)
   5 //
   6 // (C) 2002, Lluis Sanchez Gual
   7 //
   8
   9 //
  10 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.Threading;
  34 using System.Reflection;
  35 using System.Runtime.Remoting.Proxies;
  36
  37 namespace System.Runtime.Remoting.Messaging
  38 {
  39         // Sink that calls the real method of the object
  40
  41         internal class StackBuilderSink: IMessageSink
  42         {
  43                 MarshalByRefObject _target;
  44                 RealProxy _rp;
  45
  46                 public StackBuilderSink (MarshalByRefObject obj, bool forceInternalExecute)
  47                 {
  48                         _target = obj;
  49                         if (!forceInternalExecute && RemotingServices.IsTransparentProxy (obj))
  50                                 _rp = RemotingServices.GetRealProxy (obj);
  51                 }
  52
  53                 public IMessage SyncProcessMessage (IMessage msg)
  54                 {
  55                         CheckParameters (msg);
  56
  57                         // Makes the real call to the object
  58                         if (_rp != null) return _rp.Invoke (msg);
  59                         else return RemotingServices.InternalExecuteMessage (_target, (IMethodCallMessage)msg);
  60                 }
  61
  62                 public IMessageCtrl AsyncProcessMessage (IMessage msg, IMessageSink replySink)
  63                 {
  64                         object[] parms = new object[] {msg, replySink};
  65                         ThreadPool.QueueUserWorkItem (new WaitCallback (ExecuteAsyncMessage), parms);
  66                         return null;
  67                 }
  68
  69                 void ExecuteAsyncMessage (object ob)
  70                 {
  71                         object[] parms = (object[]) ob;
  72                         IMethodCallMessage msg = (IMethodCallMessage) parms[0];
  73                         IMessageSink replySink = (IMessageSink)parms[1];
  74
  75                         CheckParameters (msg);
  76
  77                         IMessage res;
  78                         if (_rp != null) res = _rp.Invoke (msg);
  79                         else res = RemotingServices.InternalExecuteMessage (_target, msg);
  80
  81                         replySink.SyncProcessMessage (res);
  82                 }
  83
  84                 public IMessageSink NextSink
  85                 {
  86                         get { return null; }
  87                 }
  88
  89                 void CheckParameters (IMessage msg)
  90                 {
  91                         IMethodCallMessage mcm = (IMethodCallMessage) msg;
  92
  93                         MethodInfo mi = (MethodInfo) mcm.MethodBase;
  94
  95                         ParameterInfo[] parameters = mi.GetParameters();
  96                         int narg = 0;
  97
  98                         foreach (ParameterInfo pi in parameters)
  99                         {
 100                                 object pval = mcm.GetArg (narg++);
 101                                 Type pt = pi.ParameterType;
 102                                 if (pt.IsByRef) pt = pt.GetElementType ();
 103
 104                                 if (pval != null && !pt.IsInstanceOfType (pval))
 105                                         throw new RemotingException ("Cannot cast argument " + pi.Position + " of type '" + pval.GetType().AssemblyQualifiedName +
 106                                                 "' to type '" + pt.AssemblyQualifiedName + "'");
 107                         }
 108                 }
 109         }
 110 }