InstanceHandleReference.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / System.Runtime.DurableInstancing / System / Runtime / DurableInstancing / InstanceHandleReference.cs / 1305376 / InstanceHandleReference.cs
                        

                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------

namespace System.Runtime.DurableInstancing 
{
    // This class serves as a reference back to an InstanceHandle from the perspective of an InstanceOwner for tracking lock binds in progress. 
    // It works in two modes, one as a pure cancelable handle reference (where cancelling means nulling out the reference) and the 
    // other as a queue position marker for determining when all of the in-progress requests at one point in time are all done.  In the
    // marker mode (InstanceOwner.LockResolutionMarker), it carries some additional context for maintaining the state of the 
    // InstancePersistenceContext.ResolveExistingLock operation.
    class InstanceHandleReference
    {
        internal InstanceHandleReference(InstanceHandle instanceHandle) 
        {
            Fx.Assert(instanceHandle != null, "Null instanceHandle provided to InstanceHandleReference."); 
            InstanceHandle = instanceHandle; 
        }
 
        // This is set to null when the InstanceHandleReference is detached from the InstanceHandle - i.e. it is
        // no longer in use, and exists just to make it possible to lazily drain out of the various queues.
        internal InstanceHandle InstanceHandle { get; private set; }
 
        internal void Cancel()
        { 
            Fx.Assert(InstanceHandle != null, "InstanceHandleReference already cancelled."); 
            InstanceHandle = null;
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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