final long hashMask = 0x7fffffffffffffffl;
    long nTableElements = 11671106;

        public void put(long hash, int score, int depth) {
                // mask to make sure it is a positive value
                hash &= hashMask;

        // make sure no other thread fiddles with it
                int lockIndex = (int)(hash & 255);
                locks[lockIndex].acquireUninterruptibly();

                int arrayIndex = (int)(hash % nTableElements);
                hashes[arrayIndex] = hash;
                scores[arrayIndex] = score;
                depths[arrayIndex] = depth;

                locks[lockIndex].release();
        }