Add project files.

Esiur/Engine/AsyncQueue.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Esiur.Engine
+{
+    public class AsyncQueue<T> : AsyncReply
+    {
+        List<AsyncReply<T>> list = new List<AsyncReply<T>>();
+        //Action<T> callback;
+        object queueLock = new object();
+
+        public void Then(Action<T> callback)
+        {
+            base.Then(new Action<object>(o => callback((T)o)));
+        }
+
+        public void Add(AsyncReply<T> reply)
+        {
+            lock (queueLock)
+                list.Add(reply);
+
+            resultReady = false;
+            reply.Then(processQueue);
+        }
+
+        public void Remove(AsyncReply<T> reply)
+        {
+            lock (queueLock)
+                list.Remove(reply);
+            processQueue(default(T));
+        }
+
+        void processQueue(T o)
+        {
+            lock (queueLock)
+                for (var i = 0; i < list.Count; i++)
+                    if (list[i].Ready)
+                    {
+                        Trigger(list[i].Result);
+                        list.RemoveAt(i);
+                        i--;
+                    }
+                    else
+                        break;
+
+            resultReady = (list.Count == 0);
+        }
+
+        public AsyncQueue()
+        {
+
+        }
+    }
+}