From cb1c34aef0199b58000cc525d9017da244c00cf8 Mon Sep 17 00:00:00 2001
From: tqchen <tianqi.tchen@gmail.com>
Date: Sat, 22 Nov 2014 17:15:05 -0800
Subject: [PATCH] add nonblocking mode

---
 src/sync/sync_tcp.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/sync/sync_tcp.cpp b/src/sync/sync_tcp.cpp
index cfd0d57cd..dd851d05a 100644
--- a/src/sync/sync_tcp.cpp
+++ b/src/sync/sync_tcp.cpp
@@ -101,6 +101,8 @@ class SyncManager {
     // setup selecter
     selecter.Clear();
     for (size_t i = 0; i < links.size(); ++i) {
+      // set the socket to non-blocking mode
+      links[i].sock.SetNonBlock();
       selecter.WatchRead(links[i].sock);
       selecter.WatchWrite(links[i].sock);
     }