/// <summary>
/// Communicates a request for cancellation.
/// </summary>
public void Cancel()
{
lock (locker)
{
if (IsCancellationRequested || !TaskStatesChecker.IsPendingOrWorking(State))
{
return;
}
State = TaskStates.Cancelling;
}
try
{
OnCancel();
}
catch (OperationCanceledException)
{
}
CancellationRequested?.Invoke(this, new EventArgs());
}
internal async Task DoRequestCancellation()
{
CancellationRequested?.Invoke(this, EventArgs.Empty);
await Task.CompletedTask.ConfigureAwait(false);
}
protected virtual void OnCancellationRequested()
{
CancellationRequested?.Invoke(null, new AutomaticCancellationEventArgs(cancellationResons));
}
private void RaiseCancellationRequestedEvent()
{
CancellationRequested?.Invoke(this, EventArgs.Empty);
}
