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9043bec954
trx_rsegf_get(), trx_undo_get_first_rec(): Change the parameter to fil_space_t* so that fewer callers need to be adjusted. trx_undo_free_page(): Remove the redundant parameter 'space'.
124 lines
3.6 KiB
Text
124 lines
3.6 KiB
Text
/*****************************************************************************
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Copyright (c) 1996, 2013, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2017, 2018, MariaDB Corporation.
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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 as published by the Free Software
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Foundation; version 2 of the License.
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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 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 Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/trx0rseg.ic
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Rollback segment
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Created 3/26/1996 Heikki Tuuri
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*******************************************************/
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#include "srv0srv.h"
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#include "mtr0log.h"
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/** Gets a rollback segment header.
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@param[in] space space where placed
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@param[in] page_no page number of the header
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@param[in,out] mtr mini-transaction
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@return rollback segment header, page x-latched */
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UNIV_INLINE
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trx_rsegf_t*
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trx_rsegf_get(fil_space_t* space, ulint page_no, mtr_t* mtr)
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{
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ut_ad(space == fil_system.sys_space || space == fil_system.temp_space
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|| srv_is_undo_tablespace(space->id)
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|| !srv_was_started);
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buf_block_t* block = buf_page_get(page_id_t(space->id, page_no),
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univ_page_size, RW_X_LATCH, mtr);
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buf_block_dbg_add_level(block, SYNC_RSEG_HEADER);
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return TRX_RSEG + block->frame;
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}
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/** Gets a newly created rollback segment header.
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@param[in] space space where placed
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@param[in] page_no page number of the header
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@param[in,out] mtr mini-transaction
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@return rollback segment header, page x-latched */
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UNIV_INLINE
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trx_rsegf_t*
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trx_rsegf_get_new(
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ulint space,
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ulint page_no,
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mtr_t* mtr)
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{
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buf_block_t* block;
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trx_rsegf_t* header;
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ut_ad(space <= srv_undo_tablespaces_active || space == SRV_TMP_SPACE_ID
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|| !srv_was_started);
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ut_ad(space <= TRX_SYS_MAX_UNDO_SPACES || space == SRV_TMP_SPACE_ID);
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block = buf_page_get(
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page_id_t(space, page_no), univ_page_size, RW_X_LATCH, mtr);
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buf_block_dbg_add_level(block, SYNC_RSEG_HEADER_NEW);
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header = TRX_RSEG + buf_block_get_frame(block);
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return(header);
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}
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/***************************************************************//**
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Sets the file page number of the nth undo log slot. */
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UNIV_INLINE
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void
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trx_rsegf_set_nth_undo(
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/*===================*/
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trx_rsegf_t* rsegf, /*!< in: rollback segment header */
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ulint n, /*!< in: index of slot */
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ulint page_no,/*!< in: page number of the undo log segment */
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mtr_t* mtr) /*!< in: mtr */
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{
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ut_a(n < TRX_RSEG_N_SLOTS);
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mlog_write_ulint(rsegf + TRX_RSEG_UNDO_SLOTS + n * TRX_RSEG_SLOT_SIZE,
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page_no, MLOG_4BYTES, mtr);
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}
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/****************************************************************//**
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Looks for a free slot for an undo log segment.
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@return slot index or ULINT_UNDEFINED if not found */
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UNIV_INLINE
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ulint
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trx_rsegf_undo_find_free(const trx_rsegf_t* rsegf)
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{
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ulint i;
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ulint page_no;
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ulint max_slots = TRX_RSEG_N_SLOTS;
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#ifdef UNIV_DEBUG
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if (trx_rseg_n_slots_debug) {
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max_slots = ut_min(static_cast<ulint>(trx_rseg_n_slots_debug),
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static_cast<ulint>(TRX_RSEG_N_SLOTS));
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}
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#endif
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for (i = 0; i < max_slots; i++) {
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page_no = trx_rsegf_get_nth_undo(rsegf, i);
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if (page_no == FIL_NULL) {
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return(i);
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}
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}
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return(ULINT_UNDEFINED);
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}
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