From f96329907641be180b50a48b8b8658fa0fe57262 Mon Sep 17 00:00:00 2001
From: zengkai <zengkai@bytedance.com>
Date: Mon, 13 Jan 2020 20:43:58 +0800
Subject: [PATCH] fix data race crash in memory cache

---
 YYCache/YYMemoryCache.m | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/YYCache/YYMemoryCache.m b/YYCache/YYMemoryCache.m
index 9042d9b..3a27ccc 100644
--- a/YYCache/YYMemoryCache.m
+++ b/YYCache/YYMemoryCache.m
@@ -402,8 +402,9 @@ - (id)objectForKey:(id)key {
         node->_time = CACurrentMediaTime();
         [_lru bringNodeToHead:node];
     }
+    id value = node ? node->_value : nil;
     pthread_mutex_unlock(&_lock);
-    return node ? node->_value : nil;
+    return value;
 }
 
 - (void)setObject:(id)object forKey:(id)key {