Function getTimerDuration

lib/internal/timers.js:421–436

(msecs, name)

// Type checking used by timers.enroll() and Socket#setTimeout()
function getTimerDuration(msecs, name) {
  validateNumber(msecs, name);
  if (msecs < 0 || !NumberIsFinite(msecs)) {
    throw new ERR_OUT_OF_RANGE(name, 'a non-negative finite number', msecs);
  }

  // Ensure that msecs fits into signed int32
  if (msecs > TIMEOUT_MAX) {
    process.emitWarning(`${msecs} does not fit into a 32-bit signed integer.` +
                        `\nTimer duration was truncated to ${TIMEOUT_MAX}.`,
                        'TimeoutOverflowWarning');
    return TIMEOUT_MAX;
  }

  return msecs;
}

function compareTimersLists(a, b) {
  const expiryDiff = a.expiry - b.expiry;