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by brian
clean slate |
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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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#if DATA_ROW_ID_LEN != 6 |
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# error "DATA_ROW_ID_LEN != 6" |
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#endif
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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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#if DATA_ROW_ID_LEN != 6 |
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# error "DATA_ROW_ID_LEN != 6" |
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#endif
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mach_write_to_6(field, row_id); |
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}
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