Notify when thread is complete, without locking calling thread

Question

I am working on a legacy application that is built on top of NET 3.5. This is a constraint that I can\'t change. I need to execute a second thread to run a long running tas

Answer 1

1. A very simple thread of execution with completion callback
2. This does not need to run in a mono behavior and is simply used for convenience

using System;
using System.Collections.Generic;
using System.Threading;
using UnityEngine;

public class ThreadTest : MonoBehaviour
{
    private List numbers = null;

    private void Start()
    {
        Debug.Log("1. Call thread task");

        StartMyLongRunningTask();

        Debug.Log("2. Do something else");
    }

    private void StartMyLongRunningTask()
    {
        numbers = new List();

        ThreadStart starter = myLongRunningTask;

        starter += () =>
        {
            myLongRunningTaskDone();
        };

        Thread _thread = new Thread(starter) { IsBackground = true };
        _thread.Start();
    }

    private void myLongRunningTaskDone()
    {
        Debug.Log("3. Task callback result");

        foreach (int num in numbers)
            Debug.Log(num);
    }


    private void myLongRunningTask()
    {
        for (int i = 0; i < 10; i++)
        {
            numbers.Add(i);

            Thread.Sleep(1000);
        }
    }
}