// This happens only when the transaction under which the handle was bound is committed.
internal bool TryCompleteBind(ref InstanceHandleReference reference, ref List <InstanceHandleReference> handlesPendingResolution, out InstanceHandle handleToFree)
{
Fx.Assert(reference != null, "Bind wasn't registered - RegisterStartBind must be called.");
Fx.Assert(reference.InstanceHandle != null, "Cannot cancel and complete a bind.");
Fx.Assert(reference.InstanceHandle.Version != -1, "Handle state must be set first.");
Fx.Assert(object.ReferenceEquals(this, reference.InstanceHandle.Owner), "TryCompleteBind called on the wrong owner for a handle.");
Fx.Assert(!(reference is LockResolutionMarker) || ((LockResolutionMarker)reference).NonConflicting, "How did a Version get set if we're still resolving.");
handleToFree = null;
lock (HandlesLock)
{
try
{
InstanceHandle existingHandle;
if (BoundHandles.TryGetValue(reference.InstanceHandle.Id, out existingHandle))
{
Fx.AssertAndFailFast(!object.ReferenceEquals(existingHandle, reference.InstanceHandle), "InstanceStore lock state is not correct.");
if (existingHandle.Version <= 0 || reference.InstanceHandle.Version <= 0)
{
if (existingHandle.Version != 0 || reference.InstanceHandle.Version != 0)
{
throw Fx.Exception.AsError(new InvalidOperationException(SRCore.InvalidLockToken));
}
reference.InstanceHandle.ConflictingHandle = existingHandle;
return(false);
}
if (existingHandle.Version > reference.InstanceHandle.Version)
{
reference.InstanceHandle.ConflictingHandle = existingHandle;
return(false);
}
if (existingHandle.Version < reference.InstanceHandle.Version)
{
existingHandle.ConflictingHandle = reference.InstanceHandle;
handleToFree = existingHandle;
BoundHandles[reference.InstanceHandle.Id] = reference.InstanceHandle;
return(true);
}
if (existingHandle.Version == reference.InstanceHandle.Version)
{
// This could be a case of amnesia (backup / restore).
throw Fx.Exception.AsError(new InvalidOperationException(SRCore.InstanceStoreBoundSameVersionTwice));
}
throw Fx.AssertAndThrow("All cases covered above.");
}
else
{
BoundHandles.Add(reference.InstanceHandle.Id, reference.InstanceHandle);
return(true);
}
}
finally
{
CancelReference(ref reference, ref handlesPendingResolution);
}
}
}