Double checked locking and GCJ?

[Martin Egholm Nielsen <martin at egholm-nielsen dot dk>]

Hi there,

Sorry for bringing up what may be the most tedious thread ever. But does 
"double checked locking" work with GCJ:

// Works with acquire/release semantics for volatile
// Broken under current semantics for volatile
  class Foo {
        private volatile Helper helper = null;
        public Helper getHelper() {
            if (helper == null) {
                synchronized(this) {
                    if (helper == null)
                        helper = new Helper();
                }
            }
            return helper;
        }
    }

(From: 
http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html)

BR,
 Martin Egholm