Class SynchronizedRef

    • Field Detail

      • value_

        protected Object value_
        The maintained reference
    • Constructor Detail

      • SynchronizedRef

        public SynchronizedRef​(Object initialValue)
        Create a SynchronizedRef initially holding the given reference and using its own internal lock.
      • SynchronizedRef

        public SynchronizedRef​(Object initialValue,
                               Object lock)
        Make a new SynchronizedRef with the given initial value, and using the supplied lock.
    • Method Detail

      • get

        public final Object get()
        Return the current value
      • set

        public Object set​(Object newValue)
        Set to newValue.
        Returns:
        the old value
      • commit

        public boolean commit​(Object assumedValue,
                              Object newValue)
        Set value to newValue only if it is currently assumedValue.
        Returns:
        true if successful
      • swap

        public Object swap​(SynchronizedRef other)
        Atomically swap values with another SynchronizedRef. Uses identityHashCode to avoid deadlock when two SynchronizedRefs attempt to simultaneously swap with each other. (Note: Ordering via identyHashCode is not strictly guaranteed by the language specification to return unique, orderable values, but in practice JVMs rely on them being unique.)
        Returns:
        the new value