* ruby.h: New macro: RB_GC_GUARD().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@16015 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/ruby.h b/ruby.h
index abf9e11085..a646c6a690 100644
--- a/ruby.h
+++ b/ruby.h
@@ -224,6 +224,8 @@ VALUE rb_ull2inum _((unsigned LONG_LONG));
 
 #define TYPE(x) rb_type((VALUE)(x))
 
+#define RB_GC_GUARD(v) (*(volatile VALUE *)&(v))
+
 void rb_check_type _((VALUE,int));
 #define Check_Type(v,t) rb_check_type((VALUE)(v),t)