Class CleanerRef

src/com/sun/jna/internal/Cleaner.java:101–135

    }

    private static class CleanerRef extends PhantomReference<Object> implements Cleanable {
        private final Cleaner cleaner;
        private final Runnable cleanupTask;
        private CleanerRef previous;
        private CleanerRef next;

        public CleanerRef(Cleaner cleaner, Object referent, ReferenceQueue<? super Object> q, Runnable cleanupTask) {
            super(referent, q);
            this.cleaner = cleaner;
            this.cleanupTask = cleanupTask;
        }

        @Override
        public void clean() {
            if(cleaner.remove(this)) {
                cleanupTask.run();
            }
        }

        CleanerRef getPrevious() {
            return previous;
        }

        void setPrevious(CleanerRef previous) {
            this.previous = previous;
        }

        CleanerRef getNext() {
            return next;
        }

        void setNext(CleanerRef next) {
            this.next = next;
        }
    }

    public static interface Cleanable {
        public void clean();