From 3679d33b02782ff7d7d0fa163b815902b189c89e Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 13 Aug 2013 14:36:44 -0300
Subject: barrier conditions rewritten to test first 'isblack' and then
 'iswhite' (during a pause all objects are white, so 'isblack' fails much more
 often than 'iswhite')

---
 lgc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'lgc.c')

diff --git a/lgc.c b/lgc.c
index 700a329f..75daf796 100644
--- a/lgc.c
+++ b/lgc.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.c,v 2.143 2013/08/07 12:18:11 roberto Exp roberto $
+** $Id: lgc.c,v 2.144 2013/08/07 15:39:09 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -63,6 +63,8 @@
 #define black2gray(x)	resetbit(gch(x)->marked, BLACKBIT)
 
 
+#define valiswhite(x)   (iscollectable(x) && iswhite(gcvalue(x)))
+
 #define isfinalized(x)		testbit(gch(x)->marked, FINALIZEDBIT)
 
 #define checkdeadkey(n)	lua_assert(!ttisdeadkey(gkey(n)) || ttisnil(gval(n)))
-- 
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