lua

commit 55a710545c811f3ccb6aea6232657015f474139f
parent 753f2c1da4f80f78b12a4a7afa9a380067945e47
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Wed, 23 Jul 2014 14:16:25 -0300

detail (extra byte in LUAI_EXTRASPACE to test proper alignment of
a lua_State)

Diffstat:
M
ltests.h
 | 
5
+++--

1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/ltests.h b/ltests.h
@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.h,v 2.35 2014/07/18 13:27:45 roberto Exp roberto $
+** $Id: ltests.h,v 2.36 2014/07/23 16:47:47 roberto Exp roberto $
 ** Internal Header for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -64,7 +64,8 @@ int lua_checkmemory (lua_State *L);
 /* test for lock/unlock */
 
 struct L_EXTRA { int lock; int *plock; };
-#define LUAI_EXTRASPACE		sizeof(struct L_EXTRA)
+/* extra space before a Lua state (+1 to make it unaligned) */
+#define LUAI_EXTRASPACE		(sizeof(struct L_EXTRA) + 1)
 #define getlock(l)	(cast(struct L_EXTRA *, l) - 1)
 #define luai_userstateopen(l)  \
 	(getlock(l)->lock = 0, getlock(l)->plock = &(getlock(l)->lock))