From 0299517fc89e1123017baaa310333e3d9a0fbbd8 Mon Sep 17 00:00:00 2001
From: Aleksandar Levic <aleksandar.levic@agile-robots.com>
Date: Mon, 5 Sep 2022 15:26:53 +0200
Subject: [PATCH] feat: Add logging of dropped messages

---
 include/spdlog/async_logger-inl.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/spdlog/async_logger-inl.h b/include/spdlog/async_logger-inl.h
index a1c27a59..0fe01a03 100644
--- a/include/spdlog/async_logger-inl.h
+++ b/include/spdlog/async_logger-inl.h
@@ -7,6 +7,7 @@
 #    include <spdlog/async_logger.h>
 #endif
 
+#include <spdlog/spdlog.h>
 #include <spdlog/sinks/sink.h>
 #include <spdlog/details/thread_pool.h>
 
@@ -66,6 +67,15 @@ SPDLOG_INLINE void spdlog::async_logger::backend_sink_it_(const details::log_msg
         }
     }
 
+    if (auto pool_ptr = thread_pool_.lock())
+    {
+        auto lost_messages = pool_ptr->overrun_counter();
+        if (lost_messages > 0) {
+            spdlog::warn("Lost {} messages.", lost_messages);
+            pool_ptr->reset_overrun_counter();
+        }
+    }
+
     if (should_flush_(msg))
     {
         backend_flush_();