From 217d1dae0093ccaaac59a4fa42000e732492cb66 Mon Sep 17 00:00:00 2001
From: Jeremy Huddleston <jeremyhu@apple.com>
Date: Wed, 27 Apr 2011 17:25:53 -0700
Subject: [PATCH] Add _X_NONNULL macro to annotate when a function expects
 arguments to be non-null

This will allow with compiler optimization and better static analysis.

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
---
 Xfuncproto.h.in | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Xfuncproto.h.in b/Xfuncproto.h.in
index 88d91c0..39ca3b2 100644
--- a/Xfuncproto.h.in
+++ b/Xfuncproto.h.in
@@ -122,6 +122,12 @@ in this Software without prior written authorization from The Open Group.
 # define _X_ATTRIBUTE_PRINTF(x,y)
 #endif
 
+#if defined(__GNUC__) &&  ((__GNUC__ * 100 + __GNUC_MINOR__) >= 303)
+#define _X_NONNULL(args...)  __attribute__((nonnull(args)))
+#else
+#define _X_NONNULL(...)  /* */
+#endif
+
 #if defined(__GNUC__) &&  ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)
 #define _X_UNUSED  __attribute__((__unused__))
 #else