函数flst_init

/** The null file address */
UNIV_INTERN fil_addr_t fil_addr_null = {FIL_NULL, 0};

/********************************************************************//**
Initializes a list base node. */
UNIV_INLINE
void
flst_init(
/*======*/
    flst_base_node_t*    base,    /*!< in: pointer to base node */
    mtr_t*            mtr)    /*!< in: mini-transaction handle */
{
    ut_ad(mtr_memo_contains_page(mtr, base, MTR_MEMO_PAGE_X_FIX));

    mlog_write_ulint(base + FLST_LEN, 0, MLOG_4BYTES, mtr);
    flst_write_addr(base + FLST_FIRST, fil_addr_null, mtr);
    flst_write_addr(base + FLST_LAST, fil_addr_null, mtr);
}

/********************************************************************//**
Writes a file address. */
UNIV_INLINE
void
flst_write_addr(
/*============*/
    fil_faddr_t*    faddr,    /*!< in: pointer to file faddress */
    fil_addr_t    addr,    /*!< in: file address */
    mtr_t*        mtr)    /*!< in: mini-transaction handle */
{
    ut_ad(faddr && mtr);
    ut_ad(mtr_memo_contains_page(mtr, faddr, MTR_MEMO_PAGE_X_FIX));
    ut_a(addr.page == FIL_NULL || addr.boffset >= FIL_PAGE_DATA);
    ut_a(ut_align_offset(faddr, UNIV_PAGE_SIZE) >= FIL_PAGE_DATA);

    mlog_write_ulint(faddr + FIL_ADDR_PAGE, addr.page, MLOG_4BYTES, mtr);
    mlog_write_ulint(faddr + FIL_ADDR_BYTE, addr.boffset,
             MLOG_2BYTES, mtr);
}