From 3d010df1a87248e10e3e553b8db23890fc144ac5 Mon Sep 17 00:00:00 2001
From: henryzhx8 <zhhxjack8@aliyun.com>
Date: Sat, 14 Sep 2024 09:37:53 +0000
Subject: [PATCH] polish

---
 core/monitor/LogtailMetric.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/core/monitor/LogtailMetric.h b/core/monitor/LogtailMetric.h
index d6d76666ed..6c98081b2a 100644
--- a/core/monitor/LogtailMetric.h
+++ b/core/monitor/LogtailMetric.h
@@ -58,6 +58,8 @@ class MetricsRecord {
 
 class MetricsRecordRef {
     friend class WriteMetrics;
+    friend bool operator==(const MetricsRecordRef& lhs, std::nullptr_t rhs);
+    friend bool operator==(std::nullptr_t rhs, const MetricsRecordRef& lhs);
 
 private:
     MetricsRecord* mMetrics = nullptr;
@@ -83,6 +85,22 @@ class MetricsRecordRef {
 #endif
 };
 
+inline bool operator==(const MetricsRecordRef& lhs, std::nullptr_t rhs) {
+    return lhs.mMetrics == rhs;
+}
+
+inline bool operator==(std::nullptr_t lhs, const MetricsRecordRef& rhs) {
+    return lhs == rhs.mMetrics;
+}
+
+inline bool operator!=(const MetricsRecordRef& lhs, std::nullptr_t rhs) {
+    return !(lhs == rhs);
+}
+
+inline bool operator!=(std::nullptr_t lhs, const MetricsRecordRef& rhs) {
+    return !(lhs == rhs);
+}
+
 class ReentrantMetricsRecord {
 private:
     MetricsRecordRef mMetricsRecordRef;