From ad7edc7b2798c8363e30e38df519172a7d9f86d3 Mon Sep 17 00:00:00 2001
From: Changbin Park <gh4ck3r@gmail.com>
Date: Thu, 3 Nov 2022 23:23:45 +0900
Subject: [PATCH] avoid lockup in `ThreadPool::shutdown()` on legacy host
 (#1417)

It is found on CentOS 7.0.1406 which is very early version of CentOS 7.

Co-authored-by: Changbin Park <changbin.park@ahnlab.com>
---
 httplib.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/httplib.h b/httplib.h
index 12c7b85..761481b 100644
--- a/httplib.h
+++ b/httplib.h
@@ -560,10 +560,9 @@ public:
     {
       std::unique_lock<std::mutex> lock(mutex_);
       shutdown_ = true;
+      cond_.notify_all();
     }
 
-    cond_.notify_all();
-
     // Join...
     for (auto &t : threads_) {
       t.join();