public async Task DisposeTryDecrementAsync()
{ //****************************************
var MyLock = new AsyncCounter();
//****************************************
_ = MyLock.DisposeAsync();
Assert.IsFalse(await MyLock.TryDecrementAsync());
//****************************************
Assert.AreEqual(0, MyLock.WaitingCount, "Waiter still registered");
Assert.AreEqual(0, MyLock.CurrentCount, "Count not zero");
}
/// <summary>
/// Attempts to take an Item to the collection
/// </summary>
/// <param name="timeout">The amount of time to wait for an item to arrive in the collection</param>
/// <param name="token">A cancellation token to abort the take operation</param>
/// <returns>A task returning the result of the take operation</returns>
/// <exception cref="OperationCanceledException">The cancellation token was raised while we were waiting for an item</exception>
/// <exception cref="InvalidOperationException">The collection was completed and emptied while we were waiting for an item</exception>
/// <exception cref="TimeoutException">The timeout elapsed</exception>
public ValueTask <T> Take(TimeSpan timeout, CancellationToken token = default)
{
// Is there an item to take?
var TakeItem = _UsedSlots.TryDecrementAsync(timeout, token);
if (TakeItem.IsCompleted)
{
if (TakeItem.Result)
{
return(new ValueTask <T>(CompleteTake()));
}
throw new InvalidOperationException("Collection is empty and adding has been completed");
}
// No, wait for one to arrive
var Instance = CollectionTakeInstance.GetOrCreateFor(this, TakeItem);
return(new ValueTask <T>(Instance, Instance.Version));
}