papermc/Spigot-API-Patches/0038-Misc-Utils.patch

From 95c4831ed2b33d90983a86cbc86499d295e11ff7 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 000000000..5bb677ce5
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/utils/CachedSizeConcurrentLinkedQueue.java
@@ -0,0 +1,34 @@
+package com.destroystokyo.paper.utils;
+
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.atomic.LongAdder;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class CachedSizeConcurrentLinkedQueue<E> extends ConcurrentLinkedQueue<E> {
+    private final LongAdder cachedSize = new LongAdder();
+
+    @Override
+    public boolean add(@NotNull E e) {
+        boolean result = super.add(e);
+        if (result) {
+            cachedSize.increment();
+        }
+        return result;
+    }
+
+    @Nullable
+    @Override
+    public E poll() {
+        E result = super.poll();
+        if (result != null) {
+            cachedSize.decrement();
+        }
+        return result;
+    }
+
+    @Override
+    public int size() {
+        return cachedSize.intValue();
+    }
+}
-- 
2.21.0