From f5ad31c186ec68c78f0106da4474dca3b660bca0 Mon Sep 17 00:00:00 2001
From: Trond Norbye <trond.norbye@gmail.com>
Date: Wed, 27 Oct 2010 12:47:07 +0200
Subject: [PATCH] Check return value for ioctlsocket on win32

---
 evutil.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/evutil.c b/evutil.c
index a01c6dad..54d49e16 100644
--- a/evutil.c
+++ b/evutil.c
@@ -266,8 +266,11 @@ evutil_make_socket_nonblocking(evutil_socket_t fd)
 {
 #ifdef WIN32
 	{
-		unsigned long nonblocking = 1;
-		ioctlsocket(fd, FIONBIO, (unsigned long*) &nonblocking);
+		u_long nonblocking = 1;
+		if (ioctlsocket(fd, FIONBIO, &nonblocking) == SOCKET_ERROR) {
+			event_warn("fcntl(%d, F_GETFL)", (int)fd);
+			return -1;
+		}
 	}
 #else
 	{