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Diffstat (limited to 'storage/innobase/include/trx0rseg.inl')
-rw-r--r-- | storage/innobase/include/trx0rseg.inl | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/storage/innobase/include/trx0rseg.inl b/storage/innobase/include/trx0rseg.inl new file mode 100644 index 00000000000..687a1d5b8d8 --- /dev/null +++ b/storage/innobase/include/trx0rseg.inl @@ -0,0 +1,124 @@ +/***************************************************************************** + +Copyright (c) 1996, 2013, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 2017, 2018, 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 +trx_rsegf_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), + univ_page_size, RW_X_LATCH, mtr); + + buf_block_dbg_add_level(block, SYNC_RSEG_HEADER); + + return TRX_RSEG + block->frame; +} + +/** 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 +trx_rsegf_t* +trx_rsegf_get_new( + ulint space, + ulint page_no, + mtr_t* mtr) +{ + buf_block_t* block; + trx_rsegf_t* header; + + 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), univ_page_size, RW_X_LATCH, mtr); + + buf_block_dbg_add_level(block, SYNC_RSEG_HEADER_NEW); + + header = TRX_RSEG + buf_block_get_frame(block); + + return(header); +} + +/***************************************************************//** +Sets the file page number of the nth undo log slot. */ +UNIV_INLINE +void +trx_rsegf_set_nth_undo( +/*===================*/ + trx_rsegf_t* rsegf, /*!< in: rollback segment header */ + ulint n, /*!< in: index of slot */ + ulint page_no,/*!< in: page number of the undo log segment */ + mtr_t* mtr) /*!< in: mtr */ +{ + ut_a(n < TRX_RSEG_N_SLOTS); + + mlog_write_ulint(rsegf + TRX_RSEG_UNDO_SLOTS + n * TRX_RSEG_SLOT_SIZE, + page_no, MLOG_4BYTES, mtr); +} + +/****************************************************************//** +Looks for a free slot for an undo log segment. +@return slot index or ULINT_UNDEFINED if not found */ +UNIV_INLINE +ulint +trx_rsegf_undo_find_free(const trx_rsegf_t* rsegf) +{ + ulint i; + ulint page_no; + ulint max_slots = TRX_RSEG_N_SLOTS; + +#ifdef UNIV_DEBUG + if (trx_rseg_n_slots_debug) { + max_slots = ut_min(static_cast<ulint>(trx_rseg_n_slots_debug), + static_cast<ulint>(TRX_RSEG_N_SLOTS)); + } +#endif + + for (i = 0; i < max_slots; i++) { + page_no = trx_rsegf_get_nth_undo(rsegf, i); + + if (page_no == FIL_NULL) { + return(i); + } + } + + return(ULINT_UNDEFINED); +} |