add VRM scripts

Scripts/UniTask/LockQueue.cs

@@ -0,0 +1,56 @@
+using System.Collections;
+using System.Collections.Generic;
+
+
+namespace UniTask
+{
+    public class LockQueue<T> where T : class
+    {
+        List<T> m_queue = new List<T>();
+        public int Count
+        {
+            get
+            {
+                lock (((ICollection)m_queue).SyncRoot)
+                {
+                    return m_queue.Count;
+                }
+            }
+        }
+
+        public void Enqueue(T t)
+        {
+            lock (((ICollection)m_queue).SyncRoot)
+            {
+                m_queue.Add(t);
+            }
+        }
+
+        public T Dequeue(out int remain)
+        {
+            lock (((ICollection)m_queue).SyncRoot)
+            {
+                if (m_queue.Count == 0)
+                {
+                    remain = 0;
+                    return null;
+                }
+                var item = m_queue[0];
+                m_queue.RemoveAt(0);
+                remain = m_queue.Count;
+                return item;
+            }
+        }
+
+        public T Dequeue()
+        {
+            lock (((ICollection)m_queue).SyncRoot)
+            {
+                if (m_queue.Count == 0) return null;
+                var item = m_queue[0];
+                m_queue.RemoveAt(0);
+                return item;
+            }
+        }
+    }
+}