From f45ddcf8136fabc8a14c66250e3be540661b3634 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@operamail.com>
Date: Sat, 2 Aug 2014 20:20:16 +0200
Subject: misc
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Signed-off-by: Mattias Andrée <maandree@operamail.com>
---
 src/libmdsserver/macros.h | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'src/libmdsserver/macros.h')

diff --git a/src/libmdsserver/macros.h b/src/libmdsserver/macros.h
index cbef69c..b7eb1d8 100644
--- a/src/libmdsserver/macros.h
+++ b/src/libmdsserver/macros.h
@@ -21,9 +21,10 @@
 
 #include "config.h"
 
+#include <stdio.h>
+#include <errno.h>
 
 /*
-#include <stdio.h>
 #include <unistd.h>
 #include <pthread.h>
 #include <string.h>
@@ -333,7 +334,15 @@
  */
 #define growalloc(old, var, elements, type)  \
   (old = var, xrealloc(var, (elements) <<= 1, type) ? (var = old, (elements) >>= 1, perror(*argv), 1) : 0)
-  
+
+
+/**
+ * Call `perror` if `errno` is non-zero and set `errno` to zero
+ * 
+ * @param  str:const char*  The argument passed to `perror`
+ */
+#define xperror(str)  \
+  (errno ? perror(str), errno = 0 : 0)
 
 
 /**
-- 
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