From 630f6d6ae7dd5d45c6817c9b318059bdec290210 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anton=20Ba=CC=88rwald?= <anton.barwald@hotmail.com>
Date: Thu, 2 Nov 2017 09:59:47 +0100
Subject: [PATCH] Problem: On OSX usleep() changes the errno value

Solution: Update errno value after calling usleep()
---
 src/socket_poller.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/socket_poller.cpp b/src/socket_poller.cpp
index a460b548..3bda68e2 100644
--- a/src/socket_poller.cpp
+++ b/src/socket_poller.cpp
@@ -553,6 +553,10 @@ int zmq::socket_poller_t::wait (zmq::socket_poller_t::event_t *events_,
 #elif defined ZMQ_HAVE_ANDROID
         usleep (timeout_ * 1000);
         return -1;
+#elif defined ZMQ_HAVE_OSX
+        usleep (timeout_ * 1000);
+        errno = EAGAIN;
+        return -1;
 #else
         usleep (timeout_ * 1000);
         return -1;