31 lines
1.6 KiB
C#
31 lines
1.6 KiB
C#
//----------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//----------------------------------------------------------------
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namespace System.Runtime.DurableInstancing
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{
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// This class serves as a reference back to an InstanceHandle from the perspective of an InstanceOwner for tracking lock binds in progress.
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// It works in two modes, one as a pure cancelable handle reference (where cancelling means nulling out the reference) and the
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// 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
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// marker mode (InstanceOwner.LockResolutionMarker), it carries some additional context for maintaining the state of the
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// InstancePersistenceContext.ResolveExistingLock operation.
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class InstanceHandleReference
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{
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internal InstanceHandleReference(InstanceHandle instanceHandle)
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{
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Fx.Assert(instanceHandle != null, "Null instanceHandle provided to InstanceHandleReference.");
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InstanceHandle = instanceHandle;
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}
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// This is set to null when the InstanceHandleReference is detached from the InstanceHandle - i.e. it is
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// no longer in use, and exists just to make it possible to lazily drain out of the various queues.
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internal InstanceHandle InstanceHandle { get; private set; }
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internal void Cancel()
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{
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Fx.Assert(InstanceHandle != null, "InstanceHandleReference already cancelled.");
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InstanceHandle = null;
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}
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}
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}
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