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4e1116b2c6
Also, remove empty .ic files that were not removed by my MySQL commit. Problem: InnoDB used to support a compilation mode that allowed to choose whether the function definitions in .ic files are to be inlined or not. This stopped making sense when InnoDB moved to C++ in MySQL 5.6 (and ha_innodb.cc started to #include .ic files), and more so in MySQL 5.7 when inline methods and functions were introduced in .h files. Solution: Remove all references to UNIV_NONINL and UNIV_MUST_NOT_INLINE from all files, assuming that the symbols are never defined. Remove the files fut0fut.cc and ut0byte.cc which only mattered when UNIV_NONINL was defined.
238 lines
7.6 KiB
C++
238 lines
7.6 KiB
C++
/*****************************************************************************
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Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2017, 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.h
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Rollback segment
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Created 3/26/1996 Heikki Tuuri
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*******************************************************/
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#ifndef trx0rseg_h
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#define trx0rseg_h
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#include "trx0types.h"
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#include "trx0sys.h"
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#include "fut0lst.h"
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#include <vector>
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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(
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ulint space,
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ulint page_no,
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mtr_t* mtr);
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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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Gets the file page number of the nth undo log slot.
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@return page number of the undo log segment */
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UNIV_INLINE
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ulint
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trx_rsegf_get_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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mtr_t* mtr); /*!< in: mtr */
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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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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(
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/*=====================*/
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trx_rsegf_t* rsegf, /*!< in: rollback segment header */
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mtr_t* mtr); /*!< in: mtr */
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/** Get a rollback segment.
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@param[in] id rollback segment id
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@return rollback segment */
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UNIV_INLINE
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trx_rseg_t*
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trx_rseg_get_on_id(ulint id)
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{
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ut_a(id < TRX_SYS_N_RSEGS);
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return(trx_sys->rseg_array[id]);
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}
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/** Creates a rollback segment header.
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This function is called only when a new rollback segment is created in
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the database.
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@param[in] space space id
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@param[in] max_size max size in pages
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@param[in] rseg_slot_no rseg id == slot number in trx sys
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@param[in,out] mtr mini-transaction
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@return page number of the created segment, FIL_NULL if fail */
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ulint
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trx_rseg_header_create(
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ulint space,
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ulint max_size,
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ulint rseg_slot_no,
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mtr_t* mtr);
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/** Initialize the rollback segments in memory at database startup. */
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void
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trx_rseg_array_init();
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/** Free a rollback segment in memory. */
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void
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trx_rseg_mem_free(trx_rseg_t* rseg);
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/*********************************************************************
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Creates a rollback segment. */
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trx_rseg_t*
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trx_rseg_create(
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/*============*/
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ulint space_id, /*!< in: id of UNDO tablespace */
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ulint nth_free_slot); /*!< in: allocate nth free slot.
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0 means next free slots. */
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/********************************************************************
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Get the number of unique rollback tablespaces in use except space id 0.
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The last space id will be the sentinel value ULINT_UNDEFINED. The array
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will be sorted on space id. Note: space_ids should have have space for
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TRX_SYS_N_RSEGS + 1 elements.
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@return number of unique rollback tablespaces in use. */
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ulint
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trx_rseg_get_n_undo_tablespaces(
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/*============================*/
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ulint* space_ids); /*!< out: array of space ids of
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UNDO tablespaces */
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/* Number of undo log slots in a rollback segment file copy */
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#define TRX_RSEG_N_SLOTS (UNIV_PAGE_SIZE / 16)
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/* Maximum number of transactions supported by a single rollback segment */
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#define TRX_RSEG_MAX_N_TRXS (TRX_RSEG_N_SLOTS / 2)
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/** The rollback segment memory object */
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struct trx_rseg_t {
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/*--------------------------------------------------------*/
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/** rollback segment id == the index of its slot in the trx
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system file copy */
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ulint id;
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/** mutex protecting the fields in this struct except id,space,page_no
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which are constant */
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RsegMutex mutex;
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/** space where the rollback segment header is placed */
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ulint space;
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/** page number of the rollback segment header */
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ulint page_no;
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/** maximum allowed size in pages */
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ulint max_size;
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/** current size in pages */
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ulint curr_size;
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/*--------------------------------------------------------*/
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/* Fields for update undo logs */
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/** List of update undo logs */
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UT_LIST_BASE_NODE_T(trx_undo_t) update_undo_list;
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/** List of update undo log segments cached for fast reuse */
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UT_LIST_BASE_NODE_T(trx_undo_t) update_undo_cached;
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/*--------------------------------------------------------*/
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/* Fields for insert undo logs */
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/** List of insert undo logs */
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UT_LIST_BASE_NODE_T(trx_undo_t) insert_undo_list;
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/** List of insert undo log segments cached for fast reuse */
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UT_LIST_BASE_NODE_T(trx_undo_t) insert_undo_cached;
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/*--------------------------------------------------------*/
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/** Page number of the last not yet purged log header in the history
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list; FIL_NULL if all list purged */
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ulint last_page_no;
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/** Byte offset of the last not yet purged log header */
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ulint last_offset;
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/** Transaction number of the last not yet purged log */
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trx_id_t last_trx_no;
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/** TRUE if the last not yet purged log needs purging */
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ibool last_del_marks;
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/** Reference counter to track rseg allocated transactions. */
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ulint trx_ref_count;
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/** If true, then skip allocating this rseg as it reside in
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UNDO-tablespace marked for truncate. */
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bool skip_allocation;
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};
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/* Undo log segment slot in a rollback segment header */
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/*-------------------------------------------------------------*/
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#define TRX_RSEG_SLOT_PAGE_NO 0 /* Page number of the header page of
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an undo log segment */
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/*-------------------------------------------------------------*/
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/* Slot size */
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#define TRX_RSEG_SLOT_SIZE 4
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/* The offset of the rollback segment header on its page */
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#define TRX_RSEG FSEG_PAGE_DATA
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/* Transaction rollback segment header */
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/*-------------------------------------------------------------*/
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#define TRX_RSEG_MAX_SIZE 0 /* Maximum allowed size for rollback
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segment in pages */
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#define TRX_RSEG_HISTORY_SIZE 4 /* Number of file pages occupied
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by the logs in the history list */
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#define TRX_RSEG_HISTORY 8 /* The update undo logs for committed
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transactions */
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#define TRX_RSEG_FSEG_HEADER (8 + FLST_BASE_NODE_SIZE)
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/* Header for the file segment where
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this page is placed */
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#define TRX_RSEG_UNDO_SLOTS (8 + FLST_BASE_NODE_SIZE + FSEG_HEADER_SIZE)
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/* Undo log segment slots */
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/*-------------------------------------------------------------*/
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#include "trx0rseg.ic"
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#endif
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