函数 xdes_get_state

/**********************************************************************//**
Gets the state of an xdes.
@return    state */
UNIV_INLINE
ulint
xdes_get_state(
/*===========*/
    const xdes_t*    descr,    /*!< in: descriptor */
    mtr_t*        mtr)    /*!< in: mtr handle */
{
    ulint    state;

    ut_ad(descr && mtr);
    ut_ad(mtr_memo_contains_page(mtr, descr, MTR_MEMO_PAGE_X_FIX));

    state = mtr_read_ulint(descr + XDES_STATE, MLOG_4BYTES, mtr);
    ut_ad(state - 1 < XDES_FSEG);
    return(state);
}