From 8b461326d85241ef39bb59dd1daea50d6c0de7f4 Mon Sep 17 00:00:00 2001
From: antao <antao2002@gmail.com>
Date: Mon, 17 Dec 2018 14:22:25 +0800
Subject: [PATCH] Modify the ConfigLoader.cc file

---
 config.example.json     |  7 ++++---
 lib/src/ConfigLoader.cc | 10 ++++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/config.example.json b/config.example.json
index d9329e86..3a0ca063 100644
--- a/config.example.json
+++ b/config.example.json
@@ -47,8 +47,9 @@
     }
   ],*/
   "app": {
-    //threads_num:num of threads,1 by default
-    "threads_num": 16,
+    //threads_num:the number of IO threads,1 by default, if the value is set to 0, the number of threads
+    //will be the number of processors.
+    "threads_num": 1,
     //enable_session:false by default
     "enable_session": false,
     "session_timeout": 0,
@@ -132,4 +133,4 @@
     //of the connection without read or write
     "idle_connection_timeout": 60
   }
-}
\ No newline at end of file
+}
diff --git a/lib/src/ConfigLoader.cc b/lib/src/ConfigLoader.cc
index c30b726b..7ce11cea 100644
--- a/lib/src/ConfigLoader.cc
+++ b/lib/src/ConfigLoader.cc
@@ -19,6 +19,8 @@
 #include <iostream>
 #include <fstream>
 #include <unistd.h>
+#include <thread>
+
 using namespace drogon;
 
 ConfigLoader::ConfigLoader(const std::string &configFile)
@@ -136,6 +138,14 @@ static void loadApp(const Json::Value &app)
         return;
     //threads number
     auto threadsNum = app.get("threads_num", 1).asUInt64();
+    if (threadsNum == 0)
+    {
+        //set the number to the number of processors.
+        threadsNum = std::thread::hardware_concurrency();
+        LOG_DEBUG << "The number of processors is " << threadsNum;
+    }
+    if (threadsNum < 1)
+        threadsNum = 1;
     drogon::app().setThreadNum(threadsNum);
     //session
     auto enableSession = app.get("enable_session", false).asBool();