mirror of
https://github.com/MariaDB/server.git
synced 2025-01-31 02:51:44 +01:00
56f6dab1d0
mtr_t::write(): Replaces mlog_write_ulint(), mlog_write_ull(). Optimize away writes if the page contents does not change, except when a dummy write has been explicitly requested. Because the member function template takes a block descriptor as a parameter, it is possible to introduce better consistency checks. Due to this, the code for handling file-based lists, undo logs and user transactions was refactored to pass around buf_block_t.
72 lines
2.4 KiB
Text
72 lines
2.4 KiB
Text
/*****************************************************************************
|
|
|
|
Copyright (c) 1996, 2013, Oracle and/or its affiliates. All Rights Reserved.
|
|
Copyright (c) 2017, 2019, MariaDB Corporation.
|
|
|
|
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 Street, Fifth Floor, Boston, MA 02110-1335 USA
|
|
|
|
*****************************************************************************/
|
|
|
|
/**************************************************//**
|
|
@file include/trx0rseg.ic
|
|
Rollback segment
|
|
|
|
Created 3/26/1996 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
#include "srv0srv.h"
|
|
#include "mtr0log.h"
|
|
|
|
/** Gets a rollback segment header.
|
|
@param[in] space space where placed
|
|
@param[in] page_no page number of the header
|
|
@param[in,out] mtr mini-transaction
|
|
@return rollback segment header, page x-latched */
|
|
UNIV_INLINE
|
|
buf_block_t*
|
|
trx_rsegf_get(fil_space_t* space, ulint page_no, mtr_t* mtr)
|
|
{
|
|
ut_ad(space == fil_system.sys_space || space == fil_system.temp_space
|
|
|| srv_is_undo_tablespace(space->id)
|
|
|| !srv_was_started);
|
|
|
|
buf_block_t* block = buf_page_get(page_id_t(space->id, page_no),
|
|
0, RW_X_LATCH, mtr);
|
|
|
|
buf_block_dbg_add_level(block, SYNC_RSEG_HEADER);
|
|
return block;
|
|
}
|
|
|
|
/** Gets a newly created rollback segment header.
|
|
@param[in] space space where placed
|
|
@param[in] page_no page number of the header
|
|
@param[in,out] mtr mini-transaction
|
|
@return rollback segment header, page x-latched */
|
|
UNIV_INLINE
|
|
buf_block_t*
|
|
trx_rsegf_get_new(
|
|
ulint space,
|
|
ulint page_no,
|
|
mtr_t* mtr)
|
|
{
|
|
buf_block_t* block;
|
|
|
|
ut_ad(space <= srv_undo_tablespaces_active || space == SRV_TMP_SPACE_ID
|
|
|| !srv_was_started);
|
|
ut_ad(space <= TRX_SYS_MAX_UNDO_SPACES || space == SRV_TMP_SPACE_ID);
|
|
|
|
block = buf_page_get(page_id_t(space, page_no), 0, RW_X_LATCH, mtr);
|
|
|
|
buf_block_dbg_add_level(block, SYNC_RSEG_HEADER_NEW);
|
|
return block;
|
|
}
|