return the singleton instance for the current process . concode_field_sep int POOL_SIZE concode_elem_sep String identifier concode_elem_sep Log LOG concode_elem_sep ReadaheadPool instance concode_elem_sep long len concode_elem_sep int MAX_POOL_SIZE concode_elem_sep ThreadPoolExecutor pool concode_elem_sep int CAPACITY concode_elem_sep FileDescriptor fd concode_elem_sep long off concode_elem_sep boolean canceled concode_field_sep void cancel concode_elem_sep void cancel concode_elem_sep ReadaheadRequest readaheadStream concode_elem_sep long getOffset concode_elem_sep long getOffset concode_elem_sep long getLength concode_elem_sep long getLength concode_elem_sep ReadaheadRequest submitReadahead concode_elem_sep void run concode_elem_sep String toString
ReadaheadPool function ( ) { synchronized ( ReadaheadPool . class ) { if ( instance == null && NativeIO . isAvailable ( ) ) { instance = new ReadaheadPool ( ) ; } return instance ; } }