Added multiplayer plugin

Assets/Mirror/Runtime/Transport/Telepathy/SafeQueue.cs

@@ -0,0 +1,75 @@
+// Net 4.X has ConcurrentQueue, but ConcurrentQueue has no TryDequeueAll method,
+// which makes SafeQueue twice as fast for the send thread.
+//
+// uMMORPG 450 CCU
+//   SafeQueue:       900-1440ms latency
+//   ConcurrentQueue:     2000ms latency
+//
+// It's also noticeable in the LoadTest project, which hardly handles 300 CCU
+// with ConcurrentQueue!
+using System.Collections.Generic;
+
+namespace Telepathy
+{
+    public class SafeQueue<T>
+    {
+        readonly Queue<T> queue = new Queue<T>();
+
+        // for statistics. don't call Count and assume that it's the same after the
+        // call.
+        public int Count
+        {
+            get
+            {
+                lock (queue)
+                {
+                    return queue.Count;
+                }
+            }
+        }
+
+        public void Enqueue(T item)
+        {
+            lock (queue)
+            {
+                queue.Enqueue(item);
+            }
+        }
+
+        // can't check .Count before doing Dequeue because it might change inbetween,
+        // so we need a TryDequeue
+        public bool TryDequeue(out T result)
+        {
+            lock (queue)
+            {
+                result = default(T);
+                if (queue.Count > 0)
+                {
+                    result = queue.Dequeue();
+                    return true;
+                }
+                return false;
+            }
+        }
+
+        // for when we want to dequeue and remove all of them at once without
+        // locking every single TryDequeue.
+        public bool TryDequeueAll(out T[] result)
+        {
+            lock (queue)
+            {
+                result = queue.ToArray();
+                queue.Clear();
+                return result.Length > 0;
+            }
+        }
+
+        public void Clear()
+        {
+            lock (queue)
+            {
+                queue.Clear();
+            }
+        }
+    }
+}