private void spConsumerIndexCache(final long value) {
      UNSAFE.putLong(null, consumerIndexCacheAddress, value);
   }
This is to be used for an IPC queue with the direct buffer used being a memory mapped file.

@param buff
@param capacity
jctools-channels/src/main/java/org/jctools/channels/mpsc/MpscFFLamportOffHeapFixedSizeRingBuffer.java