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/*****************************************************************************
Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*****************************************************************************/
/**************************************************//**
@file include/dict0boot.ic
Data dictionary creation and booting
Created 4/18/1996 Heikki Tuuri
*******************************************************/
/**********************************************************************//**
Writes the current value of the row id counter to the dictionary header file
page. */
UNIV_INTERN
void
dict_hdr_flush_row_id(void);
/*=======================*/
/**********************************************************************//**
Returns a new row id.
@return the new id */
UNIV_INLINE
row_id_t
dict_sys_get_new_row_id(void)
/*=========================*/
{
row_id_t id;
mutex_enter(&(dict_sys->mutex));
id = dict_sys->row_id;
if (0 == (id % DICT_HDR_ROW_ID_WRITE_MARGIN)) {
dict_hdr_flush_row_id();
}
dict_sys->row_id++;
mutex_exit(&(dict_sys->mutex));
return(id);
}
/**********************************************************************//**
Reads a row id from a record or other 6-byte stored form.
@return row id */
UNIV_INLINE
row_id_t
dict_sys_read_row_id(
/*=================*/
const byte* field) /*!< in: record field */
{
#if DATA_ROW_ID_LEN != 6
# error "DATA_ROW_ID_LEN != 6"
#endif
return(mach_read_from_6(field));
}
/**********************************************************************//**
Writes a row id to a record or other 6-byte stored form. */
UNIV_INLINE
void
dict_sys_write_row_id(
/*==================*/
byte* field, /*!< in: record field */
row_id_t row_id) /*!< in: row id */
{
#if DATA_ROW_ID_LEN != 6
# error "DATA_ROW_ID_LEN != 6"
#endif
mach_write_to_6(field, row_id);
}
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