1/***************************************************************************** 2 3Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. 4 5This program is free software; you can redistribute it and/or modify 6it under the terms of the GNU General Public License, version 2.0, 7as published by the Free Software Foundation. 8 9This program is also distributed with certain software (including 10but not limited to OpenSSL) that is licensed under separate terms, 11as designated in a particular file or component or in included license 12documentation. The authors of MySQL hereby grant you an additional 13permission to link the program and your derivative works with the 14separately licensed software that they have included with MySQL. 15 16This program is distributed in the hope that it will be useful, 17but WITHOUT ANY WARRANTY; without even the implied warranty of 18MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19GNU General Public License, version 2.0, for more details. 20 21You should have received a copy of the GNU General Public License along with 22this program; if not, write to the Free Software Foundation, Inc., 2351 Franklin Street, Suite 500, Boston, MA 02110-1335 USA 24 25*****************************************************************************/ 26 27/**************************************************//** 28@file include/dict0boot.ic 29Data dictionary creation and booting 30 31Created 4/18/1996 Heikki Tuuri 32*******************************************************/ 33 34/**********************************************************************//** 35Returns a new row id. 36@return the new id */ 37UNIV_INLINE 38row_id_t 39dict_sys_get_new_row_id(void) 40/*=========================*/ 41{ 42 row_id_t id; 43 44 mutex_enter(&(dict_sys->mutex)); 45 46 id = dict_sys->row_id; 47 48 if (0 == (id % DICT_HDR_ROW_ID_WRITE_MARGIN)) { 49 50 dict_hdr_flush_row_id(); 51 } 52 53 dict_sys->row_id++; 54 55 mutex_exit(&(dict_sys->mutex)); 56 57 return(id); 58} 59 60/**********************************************************************//** 61Reads a row id from a record or other 6-byte stored form. 62@return row id */ 63UNIV_INLINE 64row_id_t 65dict_sys_read_row_id( 66/*=================*/ 67 const byte* field) /*!< in: record field */ 68{ 69#if DATA_ROW_ID_LEN != 6 70# error "DATA_ROW_ID_LEN != 6" 71#endif 72 73 return(mach_read_from_6(field)); 74} 75 76/**********************************************************************//** 77Writes a row id to a record or other 6-byte stored form. */ 78UNIV_INLINE 79void 80dict_sys_write_row_id( 81/*==================*/ 82 byte* field, /*!< in: record field */ 83 row_id_t row_id) /*!< in: row id */ 84{ 85#if DATA_ROW_ID_LEN != 6 86# error "DATA_ROW_ID_LEN != 6" 87#endif 88 89 mach_write_to_6(field, row_id); 90} 91 92/*********************************************************************//** 93Check if a table id belongs to system table. 94@return true if the table id belongs to a system table. */ 95UNIV_INLINE 96bool 97dict_is_sys_table( 98/*==============*/ 99 table_id_t id) /*!< in: table id to check */ 100{ 101 return(id < DICT_HDR_FIRST_ID); 102} 103 104 105