From 35d98ffd0be2d38fa2e1990466b05595cf8067e9 Mon Sep 17 00:00:00 2001
From: aozhiwei <aozhiwe@kingsome.cn>
Date: Sat, 13 Apr 2019 19:49:17 +0800
Subject: [PATCH] 1

---
 cpp/utils.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/cpp/utils.h b/cpp/utils.h
index aca7d55..fd69778 100644
--- a/cpp/utils.h
+++ b/cpp/utils.h
@@ -20,13 +20,19 @@ namespace a8
 
 namespace f8
 {
+    typedef void (*ReadCsvMetaFileCallback)(const std::string&);
+
     bool ReadCsvMetaFile(const std::string& filename,
                          google::protobuf::Message* prototype,
                          std::function<void (google::protobuf::Message*)> push_back_func);
 
     template <typename T>
-    bool ReadCsvMetaFile(const std::string& filename, std::list<T>& meta_list)
+    bool ReadCsvMetaFile(const std::string& filename, std::list<T>& meta_list,
+                         ReadCsvMetaFileCallback callback_func = nullptr)
     {
+        if (callback_func) {
+            callback_func(filename);
+        }
         T dummy;
         return ReadCsvMetaFile(filename,
                                &dummy,