using System;
using System.Linq;
using System.Collections.Generic;
using System.Collections.Concurrent;
using System.Reflection;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Tasks;

int data = 0, ready = 0, observed = -1;
OwnedThreads.Run(
    () => { data = 37; Volatile.Write(ref ready, 1); },
    () => { if (!SpinWait.SpinUntil(() => Volatile.Read(ref ready) == 1, TimeSpan.FromSeconds(5))) throw new TimeoutException(); observed = data; });
Console.WriteLine($"value:{observed}");
Console.WriteLine($"ready:{Volatile.Read(ref ready)}");

public static class OwnedThreads
{
    public static void Run(params Action[] actions)
    {
        var errors = new ConcurrentQueue<Exception>();
        var threads = actions.Select(action => new Thread(() => { try { action(); } catch (Exception error) { errors.Enqueue(error); } }) { IsBackground = true }).ToArray();
        foreach (var thread in threads) thread.Start();
        foreach (var thread in threads) if (!thread.Join(TimeSpan.FromSeconds(8))) throw new TimeoutException("Owned worker did not finish");
        if (!errors.IsEmpty) throw new AggregateException(errors);
    }
}