Method register

src/com/sun/jna/internal/Cleaner.java:55–59

(Object obj, Runnable cleanupTask)

    }

    public synchronized Cleanable register(Object obj, Runnable cleanupTask) {
        // The important side effect is the PhantomReference, that is yielded
        // after the referent is GCed
        return add(new CleanerRef(this, obj, referenceQueue, cleanupTask));
    }

    private synchronized CleanerRef add(CleanerRef ref) {
        synchronized (referenceQueue) {