public AwaitableCancellationToken(CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
_task = TaskConstants <T> .Canceled;
_registration = default;
}
else if (cancellationToken.CanBeCanceled)
{
var promise = new Promise <T>();
_task = promise.Task;
_registration = promise.AssignCancellationToken(cancellationToken);
}
else
{
_task = TaskConstants <T> .Infinite;
_registration = default;
}
}
private static async Task <T> WithCancellationAsync <T>(Task <T> task, CancellationToken cancellationToken, Action <Task <T> > disposeAction = null)
{
var cancellationPromise = new Promise <T>();
using (cancellationPromise.AssignCancellationToken(cancellationToken))
{
var completedTask = await Task.WhenAny(task, cancellationPromise.Task).ConfigureAwait(false);
if (completedTask != task)
{
if (disposeAction != null)
{
task.ContinueWithSynchronously(disposeAction, CancellationToken.None).IgnoreAwait(Log);
}
else
{
task.IgnoreAwait(Log);
}
}
return(completedTask.GetResult());
}
}
public void AssignCancellationToken(CancellationToken cancellationToken) => _inner.AssignCancellationToken(cancellationToken);
public CancellationTokenRegistration AssignCancellationToken(CancellationToken cancellationToken) => _inner.AssignCancellationToken(cancellationToken);