From 34d7570a34c0daec5ca9c705296470b31d743d91 Mon Sep 17 00:00:00 2001
From: guo-shaoge <shaoge1994@163.com>
Date: Mon, 11 Jul 2022 20:13:04 +0800
Subject: [PATCH] delete copy/move ctor of MPMCQueue explicitly (#5328)

close pingcap/tiflash#5329
---
 dbms/src/Common/MPMCQueue.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dbms/src/Common/MPMCQueue.h b/dbms/src/Common/MPMCQueue.h
index 31dfc65a174..e005c363eae 100644
--- a/dbms/src/Common/MPMCQueue.h
+++ b/dbms/src/Common/MPMCQueue.h
@@ -15,6 +15,7 @@
 #pragma once
 
 #include <Common/SimpleIntrusiveNode.h>
+#include <Common/nocopyable.h>
 #include <common/defines.h>
 #include <common/types.h>
 
@@ -74,6 +75,11 @@ class MPMCQueue
             destruct(getObj(read_pos));
     }
 
+    // Cannot to use copy/move constructor,
+    // because MPMCQueue maybe used by different threads.
+    // Copy and move it is dangerous.
+    DISALLOW_COPY_AND_MOVE(MPMCQueue);
+
     /// Block until:
     /// 1. Pop succeeds with a valid T: return true.
     /// 2. The queue is cancelled or finished: return false.