Function needFinish

lib/internal/streams/writable.js:870–884

(state)

};

function needFinish(state) {
  return (
    // State is ended && constructed but not destroyed, finished, writing, errorEmitted or closedEmitted
    (state[kState] & (
      kEnding |
          kDestroyed |
          kConstructed |
          kFinished |
          kWriting |
          kErrorEmitted |
          kCloseEmitted |
          kErrored |
          kBuffered
    )) === (kEnding | kConstructed) && state.length === 0);
}

function onFinish(stream, state, err) {
  if ((state[kState] & kPrefinished) !== 0) {