From 3b6163f5870cb7cfcddff0db320c1f29cbc8fadf Mon Sep 17 00:00:00 2001
From: Mateusz Jakub Fila <mateusz.jakub.fila@cern.ch>
Date: Thu, 9 Apr 2026 16:08:46 +0200
Subject: [PATCH] synchronize printouts

---
 examples/logging_utils.hpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/examples/logging_utils.hpp b/examples/logging_utils.hpp
index 8a1609d..837e4ed 100644
--- a/examples/logging_utils.hpp
+++ b/examples/logging_utils.hpp
@@ -3,14 +3,15 @@
 #include <format>
 #include <iostream>
 #include <string_view>
+#include <syncstream>
 #include <thread>
 
-static inline std::ostream& log() {
-    return std::cout << std::this_thread::get_id() << "  ";
+static inline auto log() {
+    return std::osyncstream(std::cout) << std::this_thread::get_id() << "  ";
 }
 
-static inline std::ostream& log(std::string_view self) {
-    return std::cout << std::this_thread::get_id() << "  " << self << "  ";
+static inline auto log(std::string_view self) {
+    return log() << self << "  ";
 }
 
 static inline std::string format_name(std::string_view parent,