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