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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*============================================================
**
**
**
** ObjectHandle wraps object references. A Handle allows a
** marshal by value object to be returned through an
** indirection allowing the caller to control when the
** object is loaded into their domain.
**
**
===========================================================*/
namespace System.Runtime.Remoting{
using System;
using System.Security.Permissions;
using System.Runtime.InteropServices;
using System.Runtime.Remoting;
#if FEATURE_REMOTING
using System.Runtime.Remoting.Activation;
using System.Runtime.Remoting.Lifetime;
#endif
[ClassInterface(ClassInterfaceType.AutoDual)]
[System.Runtime.InteropServices.ComVisible(true)]
public class ObjectHandle:
#if FEATURE_REMOTING
MarshalByRefObject,
#endif
IObjectHandle
{
private Object WrappedObject;
private ObjectHandle()
{
}
public ObjectHandle(Object o)
{
WrappedObject = o;
}
public Object Unwrap()
{
return WrappedObject;
}
// ObjectHandle has a finite lifetime. For now the default
// lifetime is being used, this can be changed in this method to
// specify a custom lifetime.
#if FEATURE_REMOTING
[System.Security.SecurityCritical] // auto-generated_required
public override Object InitializeLifetimeService()
{
BCLDebug.Trace("REMOTE", "ObjectHandle.InitializeLifetimeService");
//
// If the wrapped object has implemented InitializeLifetimeService to return null,
// we don't want to go to the base class (which will result in a lease being
// requested from the MarshalByRefObject, which starts up the LeaseManager,
// which starts up the ThreadPool, adding three threads to the process.
// We check if the wrapped object is a MarshalByRef object, and call InitializeLifetimeServices on it
// and if it returns null, we return null. Otherwise we fall back to the old behavior.
//
MarshalByRefObject mbr = WrappedObject as MarshalByRefObject;
if (mbr != null) {
Object o = mbr.InitializeLifetimeService();
if (o == null)
return null;
}
ILease lease = (ILease)base.InitializeLifetimeService();
return lease;
}
#endif // FEATURE_REMOTING
}
}
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