Update upstream B/CB

Closes GH-569

Spigot-API-Patches/0039-Misc-Utils.patch

@@ -0,0 +1,46 @@
+From 80f595a006d469d8fe65d1324ee05d8b498a1ce5 Mon Sep 17 00:00:00 2001
+From: vemacs <d@nkmem.es>
+Date: Wed, 23 Nov 2016 12:53:43 -0500
+Subject: [PATCH] Misc Utils
+
+
+diff --git a/src/main/java/com/destroystokyo/paper/utils/CachedSizeConcurrentLinkedQueue.java b/src/main/java/com/destroystokyo/paper/utils/CachedSizeConcurrentLinkedQueue.java
+new file mode 100644
+index 0000000..d60ecbb
+--- /dev/null
++++ b/src/main/java/com/destroystokyo/paper/utils/CachedSizeConcurrentLinkedQueue.java
+@@ -0,0 +1,31 @@
++package com.destroystokyo.paper.utils;
++
++import java.util.concurrent.ConcurrentLinkedQueue;
++import java.util.concurrent.atomic.LongAdder;
++
++public class CachedSizeConcurrentLinkedQueue<E> extends ConcurrentLinkedQueue<E> {
++    private final LongAdder cachedSize = new LongAdder();
++
++    @Override
++    public boolean add(E e) {
++        boolean result = super.add(e);
++        if (result) {
++            cachedSize.increment();
++        }
++        return result;
++    }
++
++    @Override
++    public E poll() {
++        E result = super.poll();
++        if (result != null) {
++            cachedSize.decrement();
++        }
++        return result;
++    }
++
++    @Override
++    public int size() {
++        return cachedSize.intValue();
++    }
++}
+-- 
+2.9.3
+