private void UpdateSavedState(EndpointManager.Link key, EndpointManager.ResendState expectedState)
{
if (expectedState == null)
{
if (_receiveBuffers.ContainsKey(key))
{
var updatedValue = new EndpointManager.ResendState(_uid, _ackedReceiveBuffer);
_receiveBuffers.AddOrUpdate(key, updatedValue, (link, state) => updatedValue);
UpdateSavedState(key, updatedValue);
}
}
else
{
var canReplace = _receiveBuffers.ContainsKey(key) && _receiveBuffers[key].Equals(expectedState);
if (canReplace)
{
_receiveBuffers[key] = Merge(new EndpointManager.ResendState(_uid, _ackedReceiveBuffer),
expectedState);
}
else
{
EndpointManager.ResendState previousValue;
_receiveBuffers.TryGetValue(key, out previousValue);
UpdateSavedState(key, previousValue);
}
}
}