Added TaskQueue

ln.types.csproj

@@ -131,6 +131,7 @@
     <Compile Include="ByteArrayExtensions.cs" />
     <Compile Include="Promise.cs" />
     <Compile Include="test\PromiseTests.cs" />
+    <Compile Include="threads\TaskQueue.cs" />
   </ItemGroup>
   <ItemGroup>
     <Folder Include="odb\" />

threads/TaskQueue.cs

@@ -0,0 +1,44 @@
+// /**
+//  * File: TaskQueue.cs
+//  * Author: haraldwolff
+//  *
+//  * This file and it's content is copyrighted by the Author and / or copyright holder.
+//  * Any use wihtout proper permission is illegal and may lead to legal actions.
+//  *
+//  *
+//  **/
+using System;
+using ln.types.btree;
+using System.Linq;
+namespace ln.types.threads
+{
+    public class TaskQueue
+    {
+        BTreeValueList<int, Action> queue = new BTreeValueList<int, Action>();
+
+        public TaskQueue()
+        {
+        }
+
+        public bool Empty => queue.Keys.Count() == 0;
+
+        public void Enqueue(Action action) => Enqueue(0, action);
+        public void Enqueue(int priority,Action action)
+        {
+            lock (queue)
+            {
+                queue.TryRemove(priority, action);
+                queue.Add(priority, action);
+            }
+        }
+
+        public Action Dequeue()
+        {
+            lock (queue)
+            {
+                return queue.Shift();
+            }
+        }
+
+    }
+}