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cdf831cf94
changing pseudocode to use the structures of the Maria pagecache
("pagecache->changed_blocks" etc) and other Maria structures
inherited from MyISAM (THR_LOCK_maria etc).
mysys/mf_pagecache.c:
comment
storage/maria/ma_checkpoint.c:
changing pseudocode to use the structures of the Maria pagecache
("pagecache->changed_blocks" etc) and other Maria structures
inherited from MyISAM (THR_LOCK_maria etc).
storage/maria/ma_checkpoint.h:
copyright
storage/maria/ma_control_file.c:
copyright
storage/maria/ma_control_file.h:
copyright
storage/maria/ma_least_recently_dirtied.c:
copyright
storage/maria/ma_least_recently_dirtied.h:
copyright
storage/maria/ma_recovery.c:
copyright
storage/maria/ma_recovery.h:
copyright
storage/maria/unittest/Makefile.am:
copyright
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/* Copyright (C) 2006 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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WL#3234 Maria control file
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First version written by Guilhem Bichot on 2006-04-27.
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Does not compile yet.
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*/
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#ifndef _control_file_h
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#define _control_file_h
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/*
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Not everybody needs to call the control file that's why control_file.h is
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not in maria_def.h. However, policy or habit may want to change this.
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*/
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#ifndef REMOVE_WHEN_SANJA_PUSHES_LOG_HANDLER
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/*
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this is to get the control file to compile, until Sanja pushes the log
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handler which will supersede those definitions.
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*/
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typedef struct st_lsn {
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uint32 file_no;
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uint32 rec_offset;
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} LSN;
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#define maria_data_root "."
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#endif
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#define CONTROL_FILE_BASE_NAME "maria_control"
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/*
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indicate absence of the log file number; first log is always number 1, 0 is
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impossible.
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*/
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#define CONTROL_FILE_IMPOSSIBLE_FILENO 0
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/* logs always have a header */
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#define CONTROL_FILE_IMPOSSIBLE_LOG_OFFSET 0
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/*
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indicate absence of LSN.
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*/
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#define CONTROL_FILE_IMPOSSIBLE_LSN ((LSN){CONTROL_FILE_IMPOSSIBLE_FILENO,CONTROL_FILE_IMPOSSIBLE_LOG_OFFSET})
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/* Here is the interface of this module */
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/*
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LSN of the last checkoint
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(if last_checkpoint_lsn.file_no == CONTROL_FILE_IMPOSSIBLE_FILENO
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then there was never a checkpoint)
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*/
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extern LSN last_checkpoint_lsn;
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/*
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Last log number (if last_logno ==
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CONTROL_FILE_IMPOSSIBLE_FILENO then there is no log file yet)
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*/
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extern uint32 last_logno;
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/*
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Looks for the control file. If absent, it's a fresh start, create file.
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If present, read it to find out last checkpoint's LSN and last log.
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Called at engine's start.
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*/
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typedef enum enum_control_file_error {
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CONTROL_FILE_OK= 0,
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CONTROL_FILE_TOO_SMALL,
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CONTROL_FILE_TOO_BIG,
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CONTROL_FILE_BAD_MAGIC_STRING,
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CONTROL_FILE_BAD_CHECKSUM,
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CONTROL_FILE_UNKNOWN_ERROR /* any other error */
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} CONTROL_FILE_ERROR;
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CONTROL_FILE_ERROR ma_control_file_create_or_open();
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/*
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Write information durably to the control file.
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Called when we have created a new log (after syncing this log's creation)
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and when we have written a checkpoint (after syncing this log record).
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*/
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#define CONTROL_FILE_UPDATE_ALL 0
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#define CONTROL_FILE_UPDATE_ONLY_LSN 1
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#define CONTROL_FILE_UPDATE_ONLY_LOGNO 2
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int ma_control_file_write_and_force(const LSN *checkpoint_lsn, uint32 logno,
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uint objs_to_write);
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/* Free resources taken by control file subsystem */
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int ma_control_file_end();
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#endif
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