source: binary-improvements/7dtd-server-fixes/src/BlockingQueue.cs@ 285

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

namespace AllocsFixes
{
        public class BlockingQueue<T>
        {
                private bool closing = false;
                private Queue<T> queue = new Queue<T> ();

                public void Enqueue (T item)
                {
                        lock (queue) {
                                queue.Enqueue (item);
                                Monitor.PulseAll (queue);
                        }
                }

                public T Dequeue ()
                {
                        lock (queue) {
                                while (queue.Count == 0) {
                                        if (closing) {
                                                return default(T);
                                        }
                                        Monitor.Wait (queue);
                                }
                                return queue.Dequeue ();
                        }
                }

                public void Close ()
                {
                        lock (queue) {
                                closing = true;
                                Monitor.PulseAll (queue);
                        }
                }

        }
}