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Viewing changes to mysql-source/innobase/include/dict0boot.ic

  • Committer: Aleksandr Kuzminsky
  • Date: 2010-01-14 13:05:06 UTC
  • mfrom: (1.1.1 page-signature-check)
  • Revision ID: aleksandr.kuzminsky@percona.com-20100114130506-72t6jxtll15gk3pp
Added InnoDB page signature check.
At the beginning of InnoDB page (type FIL_PAGE_INODE) there are infimum and supremum records.
They are located in fixed position depending on InnoDB page format(REDUNDANT (4.x and 5.x versions) or COMPACT(5.x only)).

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mysql-source/innobase/include/dict0boot.ic
 
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/******************************************************
 
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Data dictionary creation and booting
 
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(c) 1996 Innobase Oy
 
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Created 4/18/1996 Heikki Tuuri
 
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*******************************************************/
 
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/**************************************************************************
 
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Writes the current value of the row id counter to the dictionary header file
 
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page. */
 
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void
 
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dict_hdr_flush_row_id(void);
 
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/*=======================*/
 
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/**************************************************************************
 
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Returns a new row id. */
 
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UNIV_INLINE
 
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dulint
 
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dict_sys_get_new_row_id(void)
 
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/*=========================*/
 
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                        /* out: the new id */
 
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{
 
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        dulint  id;
 
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        mutex_enter(&(dict_sys->mutex));
 
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        id = dict_sys->row_id;
 
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        if (0 == (ut_dulint_get_low(id) % DICT_HDR_ROW_ID_WRITE_MARGIN)) {
 
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                dict_hdr_flush_row_id();
 
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        }
 
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        UT_DULINT_INC(dict_sys->row_id);
 
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        mutex_exit(&(dict_sys->mutex));
 
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        return(id);
 
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}                       
 
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/**************************************************************************
 
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Reads a row id from a record or other 6-byte stored form. */
 
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UNIV_INLINE
 
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dulint
 
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dict_sys_read_row_id(
 
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/*=================*/
 
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                        /* out: row id */
 
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        byte*   field)  /* in: record field */
 
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{
 
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        ut_ad(DATA_ROW_ID_LEN == 6);
 
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        return(mach_read_from_6(field));
 
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}                               
 
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/**************************************************************************
 
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Writes a row id to a record or other 6-byte stored form. */
 
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UNIV_INLINE
 
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void
 
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dict_sys_write_row_id(
 
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/*==================*/
 
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        byte*   field,  /* in: record field */
 
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        dulint  row_id) /* in: row id */
 
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{
 
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        ut_ad(DATA_ROW_ID_LEN == 6);
 
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        mach_write_to_6(field, row_id);
 
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}                               
 
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