public static async Task WhenAny()
{
var box = new StrongBox <int>(0);
var source1 = new ValueTaskCompletionSource();
var source2 = new ValueTaskCompletionSource();
var source3 = new ValueTaskCompletionSource();
ThreadPool.QueueUserWorkItem(state =>
{
box.Value.VolatileWrite(1);
Thread.Sleep(50);
source1.Complete();
});
ThreadPool.QueueUserWorkItem(state =>
{
box.Value.VolatileWrite(2);
Thread.Sleep(200);
source2.Complete();
});
ThreadPool.QueueUserWorkItem(state =>
{
box.Value.VolatileWrite(3);
Thread.Sleep(150);
source3.Complete();
});
var completedTask = await ValueTaskSynchronization.WhenAny(source1.Task, source2.Task, source3.Task);
True(completedTask == source1.Task);
False(completedTask == source2.Task);
False(completedTask == source3.Task);
}
public static async Task WhenAnyWithResult()
{
var source1 = new ValueTaskCompletionSource <int>();
var source2 = new ValueTaskCompletionSource <int>();
var source3 = new ValueTaskCompletionSource <int>();
ThreadPool.QueueUserWorkItem(state =>
{
Thread.Sleep(50);
source1.Complete(1);
});
ThreadPool.QueueUserWorkItem(state =>
{
Thread.Sleep(200);
source2.Complete(2);
});
ThreadPool.QueueUserWorkItem(state =>
{
Thread.Sleep(150);
source3.Complete(3);
});
var completedTask = await ValueTaskSynchronization.WhenAny(source1.Task, source2.Task, source3.Task);
True(completedTask == source1.Task);
False(completedTask == source2.Task);
False(completedTask == source3.Task);
Equal(1, completedTask.Result);
}
public static async Task WhenAll()
{
var counter = new SharedCounter();
var source1 = new ValueTaskCompletionSource();
var source2 = new ValueTaskCompletionSource();
var source3 = new ValueTaskCompletionSource();
ThreadPool.QueueUserWorkItem(state =>
{
counter.Inc();
Thread.Sleep(100);
source1.Complete();
});
ThreadPool.QueueUserWorkItem(state =>
{
counter.Inc();
Thread.Sleep(200);
source2.Complete();
});
ThreadPool.QueueUserWorkItem(state =>
{
counter.Inc();
Thread.Sleep(150);
source3.Complete();
});
await ValueTaskSynchronization.WhenAll(source1.Task, source2.Task, source3.Task);
Equal(3, counter.Value);
}