void load_config(void)
{
  switch (su_mode) {
  case SU_MODE:
    logindefs_load_file(_PATH_LOGINDEFS_SU);
    break;
  case RUNUSER_MODE:
    logindefs_load_file(_PATH_LOGINDEFS_RUNUSER);
    break;
  }

  logindefs_load_file(_PATH_LOGINDEFS);
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.