/// <summary>
/// Repeats given action until the given task/awaitable completes.
/// The optional final action gets called with the task's result.
/// </summary>
public static async Task RepeatUntilCompleted <T>(this IAwaitable <T> self, Func <Task> action, Func <T, Task> finallyAction = null)
{
while (!self.IsCompleted)
{
await Await.WhenAny(action().AsAwaitable(), self);
}
if (finallyAction != null)
{
await finallyAction(self.Result);
}
}
/// <summary>
/// Repeats given action until the given task/awaitable completes.
/// </summary>
public static async Task RepeatUntilCompleted(this IAwaitable self, Func <Task> action, Action finallyAction)
{
while (!self.IsCompleted)
{
await Await.WhenAny(action().AsAwaitable(), self);
}
if (finallyAction != null)
{
finallyAction();
}
}
static async void Run(Awaitable <int> a, Awaitable <int> b, CancellationToken ct)
{
try
{
var i = await Await.WhenAny(a, b).WithCancellation(ct);
Console.WriteLine("got: {0}", i);
}
catch (OperationCanceledException)
{
Report.Line("cancelled");
}
}
/// <summary>
/// Repeats given action until the next value of this event source arrives.
/// The optional final action gets called with this newly arrived value.
/// </summary>
public static async Task RepeatUntilNext <T>(this IEvent <T> self, Func <Task> action, Action <T> finallyAction)
{
var next = self.Next;
while (!next.IsCompleted)
{
await Await.WhenAny(action().AsAwaitable(), next);
}
if (finallyAction != null)
{
finallyAction(next.Result);
}
}