ko1	2013-12-06 19:09:38 +0900 (Fri, 06 Dec 2013)

  New Revision: 44039

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=44039

  Log:
    * gc.c (atomic_sub_nounderflow): not 0 but val itself.

  Modified files:
    trunk/ChangeLog
    trunk/gc.c
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 44038)
+++ ChangeLog	(revision 44039)
@@ -1,3 +1,7 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Fri Dec  6 19:08:48 2013  Koichi Sasada  <ko1@a...>
+
+	* gc.c (atomic_sub_nounderflow): not 0 but val itself.
+
 Fri Dec  6 18:37:11 2013  Koichi Sasada  <ko1@a...>
 
 	* gc.c (rb_objspace_alloc, Init_heap): initialize
Index: gc.c
===================================================================
--- gc.c	(revision 44038)
+++ gc.c	(revision 44039)
@@ -5816,7 +5816,7 @@ atomic_sub_nounderflow(size_t *var, size https://github.com/ruby/ruby/blob/trunk/gc.c#L5816
 
     while (1) {
 	size_t val = *var;
-	if (val < sub) sub = 0;
+	if (val < sub) sub = val;
 	if (ATOMIC_SIZE_CAS(*var, val, val-sub) == val) break;
     }
 }

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