88 lines
2.6 KiB
Plaintext
88 lines
2.6 KiB
Plaintext
/*****************************************************************************
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Copyright (c) 1996, 2018, Oracle and/or its affiliates. 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, version 2.0, as published by the
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Free Software Foundation.
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This program is also distributed with certain software (including but not
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limited to OpenSSL) that is licensed under separate terms, as designated in a
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particular file or component or in included license documentation. The authors
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of MySQL hereby grant you an additional permission to link the program and
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your derivative works with the separately licensed software that they have
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included with MySQL.
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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, version 2.0,
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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.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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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/** 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 dict_sys_get_new_row_id(void) {
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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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/** 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 dict_sys_read_row_id(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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/** Writes a row id to a record or other 6-byte stored form. */
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UNIV_INLINE
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void dict_sys_write_row_id(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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/** Check if a table id belongs to old innodb internal system table.
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@param[in] id table id
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@return true if the table id belongs to a system table. */
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UNIV_INLINE
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bool dict_is_old_sys_table(table_id_t id) {
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if (srv_is_upgrade_mode) {
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return (id < DICT_HDR_FIRST_ID);
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}
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return (false);
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}
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