public void Cancel(out CompletionData completionData)
{
Complete(out completionData);
_canceledState = completionData.Completion == null ?
CanceledState.CancellationPreRequested :
CanceledState.CancellationRequested;
}
public bool ObserveCancelation()
{
if (_canceledState == CanceledState.NotCanceled)
{
return(false);
}
bool isPrerequested = _canceledState == CanceledState.CancellationPreRequested;
if (_canceledState >= CanceledState.CancellationPreRequested)
{
_canceledState = CanceledState.CancellationObserved;
// Do not reset awaitable if we were not awaiting in the first place
if (!isPrerequested)
{
Reset();
}
_cancellationToken.ThrowIfCancellationRequested();
return(true);
}
return(false);
}
public Action Cancel()
{
Action action = Complete();
_canceledState = action == null ?
CanceledState.CancellationPreRequested :
CanceledState.CancellationRequested;
return(action);
}
public PipeAwaitable(bool completed, bool useSynchronizationContext)
{
_canceledState = CanceledState.NotCanceled;
_completion = completed ? s_awaitableIsCompleted : s_awaitableIsNotCompleted;
_completionState = null;
_synchronizationContext = null;
_executionContext = null;
_useSynchronizationContext = useSynchronizationContext;
}
public void Reset()
{
if (ReferenceEquals(_state, _awaitableIsCompleted) &&
_canceledState < CanceledState.CancellationPreRequested)
{
_state = _awaitableIsNotCompleted;
}
// Change the state from observed -> not cancelled.
// We only want to reset the cancelled state if it was observed
if (_canceledState == CanceledState.CancellationObserved)
{
_canceledState = CanceledState.NotCanceled;
}
}
private AbstractState CreateAbstractState(Shipping m_Parent)
{
AbstractState _ret = null;
switch (m_Parent.ShippingState2.GetValueOrDefault(GetDefaultValue(m_Parent)))
{
case ShippingState2.Cancelation:
_ret = new CancelationState(this);
break;
case ShippingState2.Canceled:
_ret = new CanceledState(this);
break;
case ShippingState2.Completed:
_ret = new CompletedState(this);
break;
case ShippingState2.Confirmed:
_ret = new ConfirmedState(this);
break;
case ShippingState2.Creation:
_ret = new CreationState(this);
break;
case ShippingState2.Delayed:
_ret = new DelayedState(this);
break;
case ShippingState2.LackOfData:
_ret = new LackOfDataState(this);
break;
case ShippingState2.Left:
_ret = new LeftState(this);
break;
case ShippingState2.Started:
_ret = new StartedState(this);
break;
case ShippingState2.Waiting:
_ret = new WaitingState(this);
break;
}
return(_ret);
}
public void Reset()
{
if (ReferenceEquals(_completion, s_awaitableIsCompleted) &&
_canceledState < CanceledState.CancellationPreRequested)
{
_completion = s_awaitableIsNotCompleted;
_completionState = null;
_synchronizationContext = null;
_executionContext = null;
}
// Change the state from observed -> not cancelled.
// We only want to reset the cancelled state if it was observed
if (_canceledState == CanceledState.CancelationObserved)
{
_canceledState = CanceledState.NotCanceled;
}
}
public void Complete(out CompletionData completionData)
{
Action <object> currentCompletion = _completion;
object currentState = _completionState;
_completion = s_awaitableIsCompleted;
_completionState = null;
completionData = default;
if (!ReferenceEquals(currentCompletion, s_awaitableIsCompleted) &&
!ReferenceEquals(currentCompletion, s_awaitableIsNotCompleted))
{
completionData = new CompletionData(currentCompletion, currentState, _executionContext, _synchronizationContext);
}
else if (_canceledState == CanceledState.CancellationRequested)
{
// Make sure we won't reset the awaitable in ObserveCancellation
// If Complete happens in between Cancel and ObserveCancellation
_canceledState = CanceledState.CancellationPreRequested;
}
}
public PipeAwaitable(bool completed)
{
_canceledState = CanceledState.NotCanceled;
_state = completed ? _awaitableIsCompleted : _awaitableIsNotCompleted;
}
internal override void TrySetCanceled(out State state, out Func <bool> postscript, CancellationToken cancellationToken)
{
state = new CanceledState(cancellationToken);
postscript = TryPostscript;
}
internal override void SetCanceled(out State state, out Action postscript, CancellationToken cancellationToken)
{
state = new CanceledState(cancellationToken);
postscript = Postscript;
}
