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93 lines
2.4 KiB
Text
93 lines
2.4 KiB
Text
/*****************************************************************************
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Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/dict0boot.ic
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Data dictionary creation and booting
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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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UNIV_INTERN
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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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@return the new id */
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UNIV_INLINE
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row_id_t
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dict_sys_get_new_row_id(void)
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/*=========================*/
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{
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row_id_t 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 == (id % DICT_HDR_ROW_ID_WRITE_MARGIN)) {
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dict_hdr_flush_row_id();
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}
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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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@return row id */
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UNIV_INLINE
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row_id_t
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dict_sys_read_row_id(
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/*=================*/
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const 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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row_id_t 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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