From 2acbf45d368e03f8a38906676b2e3e63f299c67d Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 25 Dec 2024 13:16:14 +0900
Subject: [PATCH] [DOC] Monitor

---
 ext/monitor/lib/monitor.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ext/monitor/lib/monitor.rb b/ext/monitor/lib/monitor.rb
index 8ad39bd201..82d0a75c56 100644
--- a/ext/monitor/lib/monitor.rb
+++ b/ext/monitor/lib/monitor.rb
@@ -238,6 +238,8 @@ module MonitorMixin
     @mon_data_owner_object_id = self.object_id
   end
 
+  # Ensures that the MonitorMixin is owned by the current thread,
+  # otherwise raises an exception.
   def mon_check_owner
     @mon_data.mon_check_owner
   end