static Either<O, Thread> evalWithTimeoutReleasingDBLock(int timeoutMS, fO r) {
  bool hadLock = unlockIfHolding(dbLock());
  try {
    ret assertNotNull(evalWithTimeout(timeoutMS, r));
  } finally {
    if (hadLock) lock(dbLock());
  }
}

static Either<O, Thread> evalWithTimeoutReleasingDBLock(double timeoutSeconds, fO r) {
  ret evalWithTimeoutReleasingDBLock(toMS_int(timeoutSeconds), r);
}