Heavily improved the overall performance and async handling

- added a queuing manager for all messages
- tcp now keeps the connection after the first handshake
- async tasks are now run by the time order they were added
- minor bugfixes

MewtocolNet/Queue/SerialQueue.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Threading.Tasks;
+
+namespace MewtocolNet.Queue {
+
+    internal class SerialQueue {
+
+        readonly object _locker = new object();
+        readonly WeakReference<Task> _lastTask = new WeakReference<Task>(null);
+
+        internal Task Enqueue (Action action) {
+            return Enqueue<bool>(() => {
+                action();
+                return true;
+            });
+        }
+
+        internal Task<T> Enqueue<T> (Func<T> function) {
+            lock (_locker) {
+                Task lastTask;
+                Task<T> resultTask;
+
+                if (_lastTask.TryGetTarget(out lastTask)) {
+                    resultTask = lastTask.ContinueWith(_ => function(), TaskContinuationOptions.ExecuteSynchronously);
+                } else {
+                    resultTask = Task.Run(function);
+                }
+
+                _lastTask.SetTarget(resultTask);
+
+                return resultTask;
+            }
+        }
+
+        internal Task Enqueue (Func<Task> asyncAction) {
+            lock (_locker) {
+                Task lastTask;
+                Task resultTask;
+
+                if (_lastTask.TryGetTarget(out lastTask)) {
+                    resultTask = lastTask.ContinueWith(_ => asyncAction(), TaskContinuationOptions.ExecuteSynchronously).Unwrap();
+                } else {
+                    resultTask = Task.Run(asyncAction);
+                }
+
+                _lastTask.SetTarget(resultTask);
+
+                return resultTask;
+            }
+        }
+
+        internal Task<T> Enqueue<T> (Func<Task<T>> asyncFunction) {
+            lock (_locker) {
+                Task lastTask;
+                Task<T> resultTask;
+
+                if (_lastTask.TryGetTarget(out lastTask)) {
+                    resultTask = lastTask.ContinueWith(_ => asyncFunction(), TaskContinuationOptions.ExecuteSynchronously).Unwrap();
+                } else {
+                    resultTask = Task.Run(asyncFunction);
+                }
+
+                _lastTask.SetTarget(resultTask);
+
+                return resultTask;
+            }
+        }
+
+    }
+
+}