From 62f0a50faf813d4dfd30b1c5d25405f7e1cfaa12 Mon Sep 17 00:00:00 2001
From: Yuichi Nishiwaki <yuichi.nishiwaki@gmail.com>
Date: Tue, 3 Dec 2013 11:53:36 +0900
Subject: [PATCH] set bitfield to union header.mark

---
 include/picrin/gc.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/picrin/gc.h b/include/picrin/gc.h
index 0562f5f1..fc5a644d 100644
--- a/include/picrin/gc.h
+++ b/include/picrin/gc.h
@@ -2,15 +2,15 @@
 #define GC_H__
 
 enum pic_gc_mark {
-  PIC_GC_MARK,
-  PIC_GC_UNMARK
+  PIC_GC_UNMARK = 0,
+  PIC_GC_MARK
 };
 
 union header {
   struct {
     union header *ptr;
     size_t size;
-    enum pic_gc_mark mark;
+    enum pic_gc_mark mark : 1;
   } s;
   long alignment[2];
 };