From 739b3db69cf802214113b0a30ea6b52374fd1ede Mon Sep 17 00:00:00 2001
From: byronhe <1394332+byronhe@users.noreply.github.com>
Date: Sat, 24 Apr 2021 19:17:01 +0800
Subject: [PATCH] Update connection_pool.h (#363)

---
 include/sqlpp11/connection_pool.h | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/include/sqlpp11/connection_pool.h b/include/sqlpp11/connection_pool.h
index 14e4e81b..e2d057fa 100644
--- a/include/sqlpp11/connection_pool.h
+++ b/include/sqlpp11/connection_pool.h
@@ -173,12 +173,14 @@ namespace sqlpp
 
     pool_connection<Connection_config, Reconnect_policy, Connection> get_connection()
     {
-      std::lock_guard<std::mutex> lock(connection_pool_mutex);
-      if (!free_connections.empty())
       {
-        auto connection = std::move(free_connections.top());
-        free_connections.pop();
-        return pool_connection<Connection_config, Reconnect_policy, Connection>(connection, this);
+        std::lock_guard<std::mutex> lock(connection_pool_mutex);
+        if (!free_connections.empty())
+        {
+          auto connection = std::move(free_connections.top());
+          free_connections.pop();
+          return pool_connection<Connection_config, Reconnect_policy, Connection>(connection, this);
+        }
       }
 
       try