From f04387e9f259070dfa9d7de7b9a6dc15bffe1afa Mon Sep 17 00:00:00 2001
From: James M Snell <jasnell@gmail.com>
Date: Wed, 15 Feb 2017 13:49:51 -0800
Subject: [PATCH] lib: refactor internal/freelist
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PR-URL: https://github.com/nodejs/node/pull/11406
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
---
 lib/internal/freelist.js | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/lib/internal/freelist.js b/lib/internal/freelist.js
index 580726e872..ed1084753b 100644
--- a/lib/internal/freelist.js
+++ b/lib/internal/freelist.js
@@ -1,24 +1,25 @@
 'use strict';
 
-// This is a free list to avoid creating so many of the same object.
-exports.FreeList = function(name, max, constructor) {
-  this.name = name;
-  this.constructor = constructor;
-  this.max = max;
-  this.list = [];
-};
-
-
-exports.FreeList.prototype.alloc = function() {
-  return this.list.length ? this.list.pop() :
-                            this.constructor.apply(this, arguments);
-};
+class FreeList {
+  constructor(name, max, ctor) {
+    this.name = name;
+    this.ctor = ctor;
+    this.max = max;
+    this.list = [];
+  }
 
+  alloc() {
+    return this.list.length ? this.list.pop() :
+                              this.ctor.apply(this, arguments);
+  }
 
-exports.FreeList.prototype.free = function(obj) {
-  if (this.list.length < this.max) {
-    this.list.push(obj);
-    return true;
+  free(obj) {
+    if (this.list.length < this.max) {
+      this.list.push(obj);
+      return true;
+    }
+    return false;
   }
-  return false;
-};
+}
+
+module.exports = {FreeList};