namespace ClaudeDo.Worker.Queue;

/// <summary>
/// Owns the wake semaphore. Producers (state mutations, hub) call Wake();
/// the queue dispatcher awaits WaitAsync.
/// </summary>
public sealed class QueueWaker : IQueueWaker
{
    private readonly SemaphoreSlim _signal = new(0, 1);

    public void Wake()
    {
        try { _signal.Release(); }
        catch (SemaphoreFullException) { /* already signalled */ }
    }

    public Task WaitAsync(CancellationToken ct) => _signal.WaitAsync(ct);
}