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/*****************************************************************************
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;
}
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