--- a/TaskManager/kernel/ppe/MailManager.cc	Thu Nov 19 18:45:24 2009 +0900
+++ b/TaskManager/kernel/ppe/MailManager.cc	Fri Nov 20 23:12:34 2009 +0900
@@ -98,3 +98,24 @@
 	return list;
     }
 }
+
+int
+MailManager::length(MailQueuePtr list)
+{
+    MailQueuePtr p = list;
+    MailQueuePtr q = p;
+    int i = 0;
+
+    while(p) {
+	i++;
+	p=p->next;
+	if (i%2==0) {
+	    q = q->next;
+	}
+	if (p==q)
+	    return -1; // means loop
+    }
+    return i;
+}
+
+/* end */