mcs/class/corlib/System/MarshalByRefObject.cs

   1 //
   2 // System.MarshalByRefObject.cs
   3 //
   4 // Authors:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //   Lluis Sanchez Gual (lsg@ctv.es)
   7 //   Patrik Torstensson (totte_mono@yahoo.com)
   8 //
   9 // (C) Ximian, Inc.  http://www.ximian.com
  10 // Copyright (C) 2004-2005 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.Threading;
  33 using System.Runtime.Remoting;
  34 using System.Security.Permissions;
  35 using System.Runtime.InteropServices;
  36
  37 namespace System
  38 {
  39         [Serializable]
  40         [ComVisible (true)]
  41         [StructLayout (LayoutKind.Sequential)]
  42         public abstract class MarshalByRefObject
  43         {
  44                 [NonSerialized]
  45 #if DISABLE_REMOTING
  46                 private object _identity; //Keep layout equal to avoid runtime issues
  47 #else
  48                 private ServerIdentity _identity; // Holds marshalling iformation of the object
  49 #endif
  50
  51                 protected MarshalByRefObject ()
  52                 {
  53                 }
  54
  55 #if DISABLE_REMOTING
  56                 internal ServerIdentity ObjectIdentity {
  57                         get { throw new NotSupportedException (); }
  58                         set { throw new NotSupportedException (); }
  59                 }
  60 #else
  61
  62                 internal Identity GetObjectIdentity (MarshalByRefObject obj, out bool IsClient)
  63                 {
  64                         IsClient = false;
  65                         Identity objId = null;
  66
  67                         if (RemotingServices.IsTransparentProxy (obj)) {
  68                                 objId = RemotingServices.GetRealProxy (obj).ObjectIdentity;
  69                                 IsClient = true;
  70                         }
  71                         else {
  72                                 objId = obj.ObjectIdentity;
  73                         }
  74
  75                         return objId;
  76                 }
  77
  78                 internal ServerIdentity ObjectIdentity {
  79                         get { return _identity; }
  80                         set { _identity = value; }
  81                 }
  82 #endif
  83
  84                 [SecurityPermission (SecurityAction.LinkDemand, Infrastructure = true)]
  85                 public virtual ObjRef CreateObjRef (Type requestedType)
  86                 {
  87 #if DISABLE_REMOTING
  88                         throw new NotSupportedException ();
  89 #else
  90                         // This method can only be called when this object has been marshalled
  91                         if (_identity == null)
  92                                 throw new RemotingException (Locale.GetText ("No remoting information was found for the object."));
  93                         return _identity.CreateObjRef (requestedType);
  94 #endif
  95                 }
  96
  97                 // corcompare says it is "virtual final", so there is likely
  98                 // an internal interface in .NET.
  99                 [SecurityPermission (SecurityAction.LinkDemand, Infrastructure = true)]
 100                 public object GetLifetimeService ()
 101                 {
 102 #if DISABLE_REMOTING
 103                         throw new NotSupportedException ();
 104 #else
 105                         if (_identity == null)
 106                                 return null;
 107                         else return _identity.Lease;
 108 #endif
 109                 }
 110
 111                 [SecurityPermission (SecurityAction.LinkDemand, Infrastructure = true)]
 112                 public virtual object InitializeLifetimeService ()
 113                 {
 114 #if DISABLE_REMOTING
 115                         throw new NotSupportedException ();
 116 #else
 117                         if (_identity != null && _identity.Lease != null)
 118                                 return _identity.Lease;
 119                         else
 120                                 return new System.Runtime.Remoting.Lifetime.Lease();
 121 #endif
 122                 }
 123
 124                 protected MarshalByRefObject MemberwiseClone (bool cloneIdentity)
 125                 {
 126 #if DISABLE_REMOTING
 127                         throw new NotSupportedException ();
 128 #else
 129                         MarshalByRefObject mbr = (MarshalByRefObject) MemberwiseClone ();
 130                         if (!cloneIdentity)
 131                                 mbr._identity = null;
 132                         return mbr;
 133 #endif
 134                 }
 135         }
 136 }