Add a comment for thd->proc_info.

2d716209 · Konstantin Osipov · 381ca8f5 · 2d716209
Commit 2d716209 authored Jul 22, 2009 by Konstantin Osipov
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sql/sql_class.h sql/sql_class.h +4 -0

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--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -1335,6 +1335,10 @@ public:

    Set it using the  thd_proc_info(THD *thread, const char *message)
    macro/function.
+
+    This member is accessed and assigned without any synchronization.
+    Therefore, it may point only to constant (statically
+    allocated) strings, which memory won't go away over time.
  */
  const char *proc_info;