From d9c1f771a7575510a9612e0a67be6c61d83de982 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Mon, 9 May 2011 11:51:19 +0200
Subject: FFI: Allow setting errno with ffi.errno(), too.

---
 src/lib_ffi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lib_ffi.c b/src/lib_ffi.c
index 321de499..0f8d5013 100644
--- a/src/lib_ffi.c
+++ b/src/lib_ffi.c
@@ -545,7 +545,10 @@ LJLIB_CF(ffi_offsetof)
 
 LJLIB_CF(ffi_errno)
 {
-  setintV(L->top++, errno);
+  int err = errno;
+  if (L->top > L->base)
+    errno = ffi_checkint(L, 1);
+  setintV(L->top++, err);
   return 1;
 }
 
-- 
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