max_size.

git-svn-id: svn://qnap.local/TwoTerm/trunk@3152 5590a31f-7b70-45f8-8c82-aa3a8e5f4507

cpp/ring_buffer.h

@@ -85,6 +85,10 @@ public:
         return rv;
     }
     
+    size_t max_size() const {
+        return Size;
+    }
+
     size_t size() const {
         return Size - _capacity;
     }