From 4591d418da990d71989be97e2cb59530b7adbb8e Mon Sep 17 00:00:00 2001
From: Sebastian Schmidt <mrschmidt@google.com>
Date: Thu, 9 Nov 2017 15:41:32 -0800
Subject: Using defereed init to ensure that we init FEmptyNode only once

---
 Firebase/Database/Snapshot/FEmptyNode.m | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'Firebase/Database')

diff --git a/Firebase/Database/Snapshot/FEmptyNode.m b/Firebase/Database/Snapshot/FEmptyNode.m
index dd2d9ea..f41e118 100644
--- a/Firebase/Database/Snapshot/FEmptyNode.m
+++ b/Firebase/Database/Snapshot/FEmptyNode.m
@@ -21,9 +21,10 @@
 
 + (id<FNode>) emptyNode {
     static FChildrenNode* empty = nil;
-    if (empty == nil) {
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
         empty = [[FChildrenNode alloc] init];
-    }
+    });
     return empty;
 }
 @end
-- 
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