AutoResetEvent Reset immediately after Set

Question

Consider the following pattern:

private AutoResetEvent signal = new AutoResetEvent(false);

private void Work()
{
    while (true)
    {
        Thread.Sleep(5000         


        

Answer 1

I would use TaskCompletionSources:

private volatile TaskCompletionSource signal = new TaskCompletionSource();

private void Work()
{
    while (true)
    {
        Thread.Sleep(5000);
        var oldSignal = signal;
        signal = new TaskCompletionSource()
        //has a waiting thread definitely been signaled by now?
        oldSignal.SetResult(0);
    }
}

public void WaitForNextEvent()
{
    signal.Task.Wait();
}

By the time that the code calls SetResult, no new code entering WaitForNextEvent can obtain the TaskCompletionSource that is being signalled.