public long getAndAdd(long delta) {
        return getAndAddVal(delta);
    }
Atomically adds to the current value the given value.

@param delta the value to add
@return the previous value
@see java.util.concurrent.atomic.AtomicLong#getAndAdd(long)
jctools-core/src/main/java/org/jctools/util/PaddedAtomicLong.java