From 2441ef11a22170499d7ae12865dc98a61230f7ed Mon Sep 17 00:00:00 2001
From: Martin Sustrik <sustrik@250bpm.com>
Date: Tue, 23 Feb 2010 23:28:25 +0100
Subject: zmq_errno helper function added

---
 bindings/c/zmq.h | 10 ++++++++++
 src/zmq.cpp      |  5 +++++
 2 files changed, 15 insertions(+)

diff --git a/bindings/c/zmq.h b/bindings/c/zmq.h
index c6d4692..254971d 100644
--- a/bindings/c/zmq.h
+++ b/bindings/c/zmq.h
@@ -211,6 +211,16 @@ typedef struct
 
 ZMQ_EXPORT int zmq_poll (zmq_pollitem_t *items, int nitems, long timeout);
 
+////////////////////////////////////////////////////////////////////////////////
+//  Experimental.
+////////////////////////////////////////////////////////////////////////////////
+
+//  This function retrieves the errno as it is known to 0MQ library. The goal
+//  of this function is to make the code 100% portable, including where 0MQ
+//  compiled with certain CRT library (on Windows) is linked to an application
+//  compiled with different CRT library.
+int zmq_errno ();
+
 ////////////////////////////////////////////////////////////////////////////////
 //  Helper functions.
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/src/zmq.cpp b/src/zmq.cpp
index 1275804..ca9a970 100644
--- a/src/zmq.cpp
+++ b/src/zmq.cpp
@@ -615,6 +615,11 @@ int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
 #endif
 }
 
+int zmq_errno ()
+{
+    return errno;
+}
+
 #if defined ZMQ_HAVE_WINDOWS
 
 static uint64_t now ()
-- 
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