mirror of
https://github.com/MariaDB/server.git
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c58543b358
Detailed revision comments:
r6348 | marko | 2009-12-22 11:04:34 +0200 (Tue, 22 Dec 2009) | 37 lines
branches/zip: Merge a change from MySQL:
r6351 | marko | 2009-12-22 11:11:18 +0200 (Tue, 22 Dec 2009) | 1 line
branches/zip: Remove an obsolete declaration of LOCK_thread_count.
r6352 | marko | 2009-12-22 12:33:01 +0200 (Tue, 22 Dec 2009) | 104 lines
branches/zip: Merge revisions 6206:6350 from branches/5.1,
except r6347, r6349, r6350 which were committed separately
to both branches, and r6310, which was backported from zip to 5.1.
------------------------------------------------------------------------
r6206 | jyang | 2009-11-20 09:38:43 +0200 (Fri, 20 Nov 2009) | 3 lines
Changed paths:
M /branches/5.1/handler/ha_innodb.cc
branches/5.1: Non-functional change, fix formatting.
------------------------------------------------------------------------
r6230 | sunny | 2009-11-24 23:52:43 +0200 (Tue, 24 Nov 2009) | 3 lines
Changed paths:
M /branches/5.1/mysql-test/innodb-autoinc.result
branches/5.1: Fix autoinc failing test results.
(this should be skipped when merging 5.1 into zip)
------------------------------------------------------------------------
r6231 | sunny | 2009-11-25 10:26:27 +0200 (Wed, 25 Nov 2009) | 7 lines
Changed paths:
M /branches/5.1/mysql-test/innodb-autoinc.result
M /branches/5.1/mysql-test/innodb-autoinc.test
M /branches/5.1/row/row0sel.c
branches/5.1: Fix BUG#49032 - auto_increment field does not initialize to last value in InnoDB Storage Engine.
We use the appropriate function to read the column value for non-integer
autoinc column types, namely float and double.
rb://208. Approved by Marko.
------------------------------------------------------------------------
r6232 | sunny | 2009-11-25 10:27:39 +0200 (Wed, 25 Nov 2009) | 2 lines
Changed paths:
M /branches/5.1/row/row0sel.c
branches/5.1: This is an interim fix, fix white space errors.
------------------------------------------------------------------------
r6233 | sunny | 2009-11-25 10:28:35 +0200 (Wed, 25 Nov 2009) | 2 lines
Changed paths:
M /branches/5.1/include/mach0data.h
M /branches/5.1/include/mach0data.ic
M /branches/5.1/mysql-test/innodb-autoinc.result
M /branches/5.1/mysql-test/innodb-autoinc.test
M /branches/5.1/row/row0sel.c
branches/5.1: This is an interim fix, fix tests and make read float/double arg const.
------------------------------------------------------------------------
r6234 | sunny | 2009-11-25 10:29:03 +0200 (Wed, 25 Nov 2009) | 2 lines
Changed paths:
M /branches/5.1/row/row0sel.c
branches/5.1: This is an interim fix, fix whitepsace issues.
------------------------------------------------------------------------
r6235 | sunny | 2009-11-26 01:14:42 +0200 (Thu, 26 Nov 2009) | 9 lines
Changed paths:
M /branches/5.1/handler/ha_innodb.cc
M /branches/5.1/mysql-test/innodb-autoinc.result
M /branches/5.1/mysql-test/innodb-autoinc.test
branches/5.1: Fix Bug#47720 - REPLACE INTO Autoincrement column with negative values.
This bug is similiar to the negative autoinc filter patch from earlier,
with the additional handling of filtering out the negative column values
set explicitly by the user.
rb://184
Approved by Heikki.
------------------------------------------------------------------------
r6242 | vasil | 2009-11-27 22:07:12 +0200 (Fri, 27 Nov 2009) | 4 lines
Changed paths:
M /branches/5.1/export.sh
branches/5.1:
Minor changes to support plugin snapshots.
------------------------------------------------------------------------
r6306 | calvin | 2009-12-14 15:12:46 +0200 (Mon, 14 Dec 2009) | 5 lines
Changed paths:
M /branches/5.1/mysql-test/innodb-autoinc.result
M /branches/5.1/mysql-test/innodb-autoinc.test
branches/5.1: fix bug#49267: innodb-autoinc.test fails on windows
because of different case mode
There is no change to the InnoDB code, only to fix test case by
changing "T1" to "t1".
------------------------------------------------------------------------
r6324 | jyang | 2009-12-17 06:54:24 +0200 (Thu, 17 Dec 2009) | 8 lines
Changed paths:
M /branches/5.1/handler/ha_innodb.cc
M /branches/5.1/include/lock0lock.h
M /branches/5.1/include/srv0srv.h
M /branches/5.1/lock/lock0lock.c
M /branches/5.1/log/log0log.c
M /branches/5.1/srv/srv0srv.c
M /branches/5.1/srv/srv0start.c
branches/5.1: Fix bug #47814 - Diagnostics are frequently not
printed after a long lock wait in InnoDB. Separate out the
lock wait timeout check thread from monitor information
printing thread.
rb://200 Approved by Marko.
------------------------------------------------------------------------
r6364 | marko | 2009-12-26 21:06:31 +0200 (Sat, 26 Dec 2009) | 4 lines
branches/zip: ibuf_bitmap_get_map_page():
Define a wrapper macro that passes __FILE__, __LINE__ of the caller
to buf_page_get_gen().
This will ease the diagnosis of the likes of Issue #135.
827 lines
30 KiB
C
827 lines
30 KiB
C
/*****************************************************************************
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Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
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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., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/lock0lock.h
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The transaction lock system
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Created 5/7/1996 Heikki Tuuri
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*******************************************************/
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#ifndef lock0lock_h
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#define lock0lock_h
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#include "univ.i"
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#include "buf0types.h"
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#include "trx0types.h"
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#include "mtr0types.h"
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#include "rem0types.h"
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#include "dict0types.h"
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#include "que0types.h"
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#include "lock0types.h"
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#include "read0types.h"
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#include "hash0hash.h"
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#include "ut0vec.h"
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#ifdef UNIV_DEBUG
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extern ibool lock_print_waits;
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#endif /* UNIV_DEBUG */
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/* Buffer for storing information about the most recent deadlock error */
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extern FILE* lock_latest_err_file;
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/*********************************************************************//**
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Gets the size of a lock struct.
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@return size in bytes */
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UNIV_INTERN
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ulint
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lock_get_size(void);
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/*===============*/
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/*********************************************************************//**
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Creates the lock system at database start. */
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UNIV_INTERN
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void
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lock_sys_create(
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/*============*/
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ulint n_cells); /*!< in: number of slots in lock hash table */
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/*********************************************************************//**
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Closes the lock system at database shutdown. */
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UNIV_INTERN
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void
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lock_sys_close(void);
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/*================*/
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/*********************************************************************//**
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Checks if some transaction has an implicit x-lock on a record in a clustered
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index.
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@return transaction which has the x-lock, or NULL */
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UNIV_INLINE
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trx_t*
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lock_clust_rec_some_has_impl(
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/*=========================*/
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const rec_t* rec, /*!< in: user record */
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dict_index_t* index, /*!< in: clustered index */
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const ulint* offsets);/*!< in: rec_get_offsets(rec, index) */
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/*********************************************************************//**
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Gets the heap_no of the smallest user record on a page.
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@return heap_no of smallest user record, or PAGE_HEAP_NO_SUPREMUM */
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UNIV_INLINE
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ulint
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lock_get_min_heap_no(
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/*=================*/
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const buf_block_t* block); /*!< in: buffer block */
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/*************************************************************//**
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Updates the lock table when we have reorganized a page. NOTE: we copy
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also the locks set on the infimum of the page; the infimum may carry
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locks if an update of a record is occurring on the page, and its locks
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were temporarily stored on the infimum. */
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UNIV_INTERN
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void
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lock_move_reorganize_page(
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/*======================*/
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const buf_block_t* block, /*!< in: old index page, now
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reorganized */
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const buf_block_t* oblock);/*!< in: copy of the old, not
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reorganized page */
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/*************************************************************//**
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Moves the explicit locks on user records to another page if a record
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list end is moved to another page. */
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UNIV_INTERN
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void
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lock_move_rec_list_end(
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/*===================*/
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const buf_block_t* new_block, /*!< in: index page to move to */
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const buf_block_t* block, /*!< in: index page */
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const rec_t* rec); /*!< in: record on page: this
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is the first record moved */
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/*************************************************************//**
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Moves the explicit locks on user records to another page if a record
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list start is moved to another page. */
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UNIV_INTERN
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void
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lock_move_rec_list_start(
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/*=====================*/
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const buf_block_t* new_block, /*!< in: index page to move to */
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const buf_block_t* block, /*!< in: index page */
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const rec_t* rec, /*!< in: record on page:
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this is the first
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record NOT copied */
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const rec_t* old_end); /*!< in: old
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previous-to-last
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record on new_page
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before the records
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were copied */
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/*************************************************************//**
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Updates the lock table when a page is split to the right. */
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UNIV_INTERN
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void
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lock_update_split_right(
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/*====================*/
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const buf_block_t* right_block, /*!< in: right page */
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const buf_block_t* left_block); /*!< in: left page */
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/*************************************************************//**
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Updates the lock table when a page is merged to the right. */
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UNIV_INTERN
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void
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lock_update_merge_right(
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/*====================*/
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const buf_block_t* right_block, /*!< in: right page to
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which merged */
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const rec_t* orig_succ, /*!< in: original
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successor of infimum
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on the right page
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before merge */
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const buf_block_t* left_block); /*!< in: merged index
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page which will be
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discarded */
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/*************************************************************//**
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Updates the lock table when the root page is copied to another in
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btr_root_raise_and_insert. Note that we leave lock structs on the
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root page, even though they do not make sense on other than leaf
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pages: the reason is that in a pessimistic update the infimum record
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of the root page will act as a dummy carrier of the locks of the record
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to be updated. */
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UNIV_INTERN
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void
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lock_update_root_raise(
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/*===================*/
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const buf_block_t* block, /*!< in: index page to which copied */
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const buf_block_t* root); /*!< in: root page */
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/*************************************************************//**
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Updates the lock table when a page is copied to another and the original page
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is removed from the chain of leaf pages, except if page is the root! */
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UNIV_INTERN
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void
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lock_update_copy_and_discard(
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/*=========================*/
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const buf_block_t* new_block, /*!< in: index page to
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which copied */
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const buf_block_t* block); /*!< in: index page;
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NOT the root! */
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/*************************************************************//**
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Updates the lock table when a page is split to the left. */
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UNIV_INTERN
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void
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lock_update_split_left(
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/*===================*/
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const buf_block_t* right_block, /*!< in: right page */
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const buf_block_t* left_block); /*!< in: left page */
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/*************************************************************//**
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Updates the lock table when a page is merged to the left. */
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UNIV_INTERN
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void
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lock_update_merge_left(
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/*===================*/
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const buf_block_t* left_block, /*!< in: left page to
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which merged */
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const rec_t* orig_pred, /*!< in: original predecessor
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of supremum on the left page
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before merge */
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const buf_block_t* right_block); /*!< in: merged index page
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which will be discarded */
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/*************************************************************//**
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Resets the original locks on heir and replaces them with gap type locks
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inherited from rec. */
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UNIV_INTERN
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void
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lock_rec_reset_and_inherit_gap_locks(
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/*=================================*/
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const buf_block_t* heir_block, /*!< in: block containing the
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record which inherits */
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const buf_block_t* block, /*!< in: block containing the
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record from which inherited;
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does NOT reset the locks on
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this record */
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ulint heir_heap_no, /*!< in: heap_no of the
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inheriting record */
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ulint heap_no); /*!< in: heap_no of the
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donating record */
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/*************************************************************//**
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Updates the lock table when a page is discarded. */
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UNIV_INTERN
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void
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lock_update_discard(
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/*================*/
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const buf_block_t* heir_block, /*!< in: index page
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which will inherit the locks */
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ulint heir_heap_no, /*!< in: heap_no of the record
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which will inherit the locks */
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const buf_block_t* block); /*!< in: index page
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which will be discarded */
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/*************************************************************//**
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Updates the lock table when a new user record is inserted. */
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UNIV_INTERN
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void
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lock_update_insert(
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/*===============*/
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const buf_block_t* block, /*!< in: buffer block containing rec */
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const rec_t* rec); /*!< in: the inserted record */
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/*************************************************************//**
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Updates the lock table when a record is removed. */
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UNIV_INTERN
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void
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lock_update_delete(
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/*===============*/
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const buf_block_t* block, /*!< in: buffer block containing rec */
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const rec_t* rec); /*!< in: the record to be removed */
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/*********************************************************************//**
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Stores on the page infimum record the explicit locks of another record.
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This function is used to store the lock state of a record when it is
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updated and the size of the record changes in the update. The record
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is in such an update moved, perhaps to another page. The infimum record
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acts as a dummy carrier record, taking care of lock releases while the
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actual record is being moved. */
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UNIV_INTERN
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void
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lock_rec_store_on_page_infimum(
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/*===========================*/
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const buf_block_t* block, /*!< in: buffer block containing rec */
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const rec_t* rec); /*!< in: record whose lock state
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is stored on the infimum
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record of the same page; lock
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bits are reset on the
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record */
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/*********************************************************************//**
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Restores the state of explicit lock requests on a single record, where the
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state was stored on the infimum of the page. */
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UNIV_INTERN
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void
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lock_rec_restore_from_page_infimum(
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/*===============================*/
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const buf_block_t* block, /*!< in: buffer block containing rec */
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const rec_t* rec, /*!< in: record whose lock state
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is restored */
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const buf_block_t* donator);/*!< in: page (rec is not
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necessarily on this page)
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whose infimum stored the lock
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state; lock bits are reset on
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the infimum */
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/*********************************************************************//**
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Returns TRUE if there are explicit record locks on a page.
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@return TRUE if there are explicit record locks on the page */
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UNIV_INTERN
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ibool
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lock_rec_expl_exist_on_page(
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/*========================*/
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ulint space, /*!< in: space id */
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ulint page_no);/*!< in: page number */
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/*********************************************************************//**
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Checks if locks of other transactions prevent an immediate insert of
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a record. If they do, first tests if the query thread should anyway
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be suspended for some reason; if not, then puts the transaction and
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the query thread to the lock wait state and inserts a waiting request
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for a gap x-lock to the lock queue.
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@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
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UNIV_INTERN
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ulint
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lock_rec_insert_check_and_lock(
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/*===========================*/
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ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG bit is
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set, does nothing */
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const rec_t* rec, /*!< in: record after which to insert */
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buf_block_t* block, /*!< in/out: buffer block of rec */
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dict_index_t* index, /*!< in: index */
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que_thr_t* thr, /*!< in: query thread */
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mtr_t* mtr, /*!< in/out: mini-transaction */
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ibool* inherit);/*!< out: set to TRUE if the new
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inserted record maybe should inherit
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LOCK_GAP type locks from the successor
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record */
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/*********************************************************************//**
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Checks if locks of other transactions prevent an immediate modify (update,
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delete mark, or delete unmark) of a clustered index record. If they do,
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first tests if the query thread should anyway be suspended for some
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reason; if not, then puts the transaction and the query thread to the
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lock wait state and inserts a waiting request for a record x-lock to the
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lock queue.
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@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
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UNIV_INTERN
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ulint
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lock_clust_rec_modify_check_and_lock(
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/*=================================*/
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ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG
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bit is set, does nothing */
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const buf_block_t* block, /*!< in: buffer block of rec */
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const rec_t* rec, /*!< in: record which should be
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modified */
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dict_index_t* index, /*!< in: clustered index */
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const ulint* offsets,/*!< in: rec_get_offsets(rec, index) */
|
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que_thr_t* thr); /*!< in: query thread */
|
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/*********************************************************************//**
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Checks if locks of other transactions prevent an immediate modify
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(delete mark or delete unmark) of a secondary index record.
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@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
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UNIV_INTERN
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ulint
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lock_sec_rec_modify_check_and_lock(
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/*===============================*/
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ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG
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bit is set, does nothing */
|
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buf_block_t* block, /*!< in/out: buffer block of rec */
|
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const rec_t* rec, /*!< in: record which should be
|
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modified; NOTE: as this is a secondary
|
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index, we always have to modify the
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clustered index record first: see the
|
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comment below */
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dict_index_t* index, /*!< in: secondary index */
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que_thr_t* thr, /*!< in: query thread */
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mtr_t* mtr); /*!< in/out: mini-transaction */
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/*********************************************************************//**
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Like the counterpart for a clustered index below, but now we read a
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secondary index record.
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@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
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UNIV_INTERN
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ulint
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lock_sec_rec_read_check_and_lock(
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/*=============================*/
|
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ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG
|
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bit is set, does nothing */
|
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const buf_block_t* block, /*!< in: buffer block of rec */
|
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const rec_t* rec, /*!< in: user record or page
|
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supremum record which should
|
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be read or passed over by a
|
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read cursor */
|
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dict_index_t* index, /*!< in: secondary index */
|
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const ulint* offsets,/*!< in: rec_get_offsets(rec, index) */
|
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enum lock_mode mode, /*!< in: mode of the lock which
|
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the read cursor should set on
|
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records: LOCK_S or LOCK_X; the
|
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latter is possible in
|
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SELECT FOR UPDATE */
|
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ulint gap_mode,/*!< in: LOCK_ORDINARY, LOCK_GAP, or
|
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LOCK_REC_NOT_GAP */
|
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que_thr_t* thr); /*!< in: query thread */
|
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/*********************************************************************//**
|
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Checks if locks of other transactions prevent an immediate read, or passing
|
|
over by a read cursor, of a clustered index record. If they do, first tests
|
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if the query thread should anyway be suspended for some reason; if not, then
|
|
puts the transaction and the query thread to the lock wait state and inserts a
|
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waiting request for a record lock to the lock queue. Sets the requested mode
|
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lock on the record.
|
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@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
|
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UNIV_INTERN
|
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ulint
|
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lock_clust_rec_read_check_and_lock(
|
|
/*===============================*/
|
|
ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG
|
|
bit is set, does nothing */
|
|
const buf_block_t* block, /*!< in: buffer block of rec */
|
|
const rec_t* rec, /*!< in: user record or page
|
|
supremum record which should
|
|
be read or passed over by a
|
|
read cursor */
|
|
dict_index_t* index, /*!< in: clustered index */
|
|
const ulint* offsets,/*!< in: rec_get_offsets(rec, index) */
|
|
enum lock_mode mode, /*!< in: mode of the lock which
|
|
the read cursor should set on
|
|
records: LOCK_S or LOCK_X; the
|
|
latter is possible in
|
|
SELECT FOR UPDATE */
|
|
ulint gap_mode,/*!< in: LOCK_ORDINARY, LOCK_GAP, or
|
|
LOCK_REC_NOT_GAP */
|
|
que_thr_t* thr); /*!< in: query thread */
|
|
/*********************************************************************//**
|
|
Checks if locks of other transactions prevent an immediate read, or passing
|
|
over by a read cursor, of a clustered index record. If they do, first tests
|
|
if the query thread should anyway be suspended for some reason; if not, then
|
|
puts the transaction and the query thread to the lock wait state and inserts a
|
|
waiting request for a record lock to the lock queue. Sets the requested mode
|
|
lock on the record. This is an alternative version of
|
|
lock_clust_rec_read_check_and_lock() that does not require the parameter
|
|
"offsets".
|
|
@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
|
|
UNIV_INTERN
|
|
ulint
|
|
lock_clust_rec_read_check_and_lock_alt(
|
|
/*===================================*/
|
|
ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG
|
|
bit is set, does nothing */
|
|
const buf_block_t* block, /*!< in: buffer block of rec */
|
|
const rec_t* rec, /*!< in: user record or page
|
|
supremum record which should
|
|
be read or passed over by a
|
|
read cursor */
|
|
dict_index_t* index, /*!< in: clustered index */
|
|
enum lock_mode mode, /*!< in: mode of the lock which
|
|
the read cursor should set on
|
|
records: LOCK_S or LOCK_X; the
|
|
latter is possible in
|
|
SELECT FOR UPDATE */
|
|
ulint gap_mode,/*!< in: LOCK_ORDINARY, LOCK_GAP, or
|
|
LOCK_REC_NOT_GAP */
|
|
que_thr_t* thr); /*!< in: query thread */
|
|
/*********************************************************************//**
|
|
Checks that a record is seen in a consistent read.
|
|
@return TRUE if sees, or FALSE if an earlier version of the record
|
|
should be retrieved */
|
|
UNIV_INTERN
|
|
ibool
|
|
lock_clust_rec_cons_read_sees(
|
|
/*==========================*/
|
|
const rec_t* rec, /*!< in: user record which should be read or
|
|
passed over by a read cursor */
|
|
dict_index_t* index, /*!< in: clustered index */
|
|
const ulint* offsets,/*!< in: rec_get_offsets(rec, index) */
|
|
read_view_t* view); /*!< in: consistent read view */
|
|
/*********************************************************************//**
|
|
Checks that a non-clustered index record is seen in a consistent read.
|
|
|
|
NOTE that a non-clustered index page contains so little information on
|
|
its modifications that also in the case FALSE, the present version of
|
|
rec may be the right, but we must check this from the clustered index
|
|
record.
|
|
|
|
@return TRUE if certainly sees, or FALSE if an earlier version of the
|
|
clustered index record might be needed */
|
|
UNIV_INTERN
|
|
ulint
|
|
lock_sec_rec_cons_read_sees(
|
|
/*========================*/
|
|
const rec_t* rec, /*!< in: user record which
|
|
should be read or passed over
|
|
by a read cursor */
|
|
const read_view_t* view); /*!< in: consistent read view */
|
|
/*********************************************************************//**
|
|
Locks the specified database table in the mode given. If the lock cannot
|
|
be granted immediately, the query thread is put to wait.
|
|
@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
|
|
UNIV_INTERN
|
|
ulint
|
|
lock_table(
|
|
/*=======*/
|
|
ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG bit is set,
|
|
does nothing */
|
|
dict_table_t* table, /*!< in: database table in dictionary cache */
|
|
enum lock_mode mode, /*!< in: lock mode */
|
|
que_thr_t* thr); /*!< in: query thread */
|
|
/*************************************************************//**
|
|
Removes a granted record lock of a transaction from the queue and grants
|
|
locks to other transactions waiting in the queue if they now are entitled
|
|
to a lock. */
|
|
UNIV_INTERN
|
|
void
|
|
lock_rec_unlock(
|
|
/*============*/
|
|
trx_t* trx, /*!< in: transaction that has
|
|
set a record lock */
|
|
const buf_block_t* block, /*!< in: buffer block containing rec */
|
|
const rec_t* rec, /*!< in: record */
|
|
enum lock_mode lock_mode);/*!< in: LOCK_S or LOCK_X */
|
|
/*********************************************************************//**
|
|
Releases transaction locks, and releases possible other transactions waiting
|
|
because of these locks. */
|
|
UNIV_INTERN
|
|
void
|
|
lock_release_off_kernel(
|
|
/*====================*/
|
|
trx_t* trx); /*!< in: transaction */
|
|
/*********************************************************************//**
|
|
Cancels a waiting lock request and releases possible other transactions
|
|
waiting behind it. */
|
|
UNIV_INTERN
|
|
void
|
|
lock_cancel_waiting_and_release(
|
|
/*============================*/
|
|
lock_t* lock); /*!< in: waiting lock request */
|
|
|
|
/*********************************************************************//**
|
|
Removes locks on a table to be dropped or truncated.
|
|
If remove_also_table_sx_locks is TRUE then table-level S and X locks are
|
|
also removed in addition to other table-level and record-level locks.
|
|
No lock, that is going to be removed, is allowed to be a wait lock. */
|
|
UNIV_INTERN
|
|
void
|
|
lock_remove_all_on_table(
|
|
/*=====================*/
|
|
dict_table_t* table, /*!< in: table to be dropped
|
|
or truncated */
|
|
ibool remove_also_table_sx_locks);/*!< in: also removes
|
|
table S and X locks */
|
|
|
|
/*********************************************************************//**
|
|
Calculates the fold value of a page file address: used in inserting or
|
|
searching for a lock in the hash table.
|
|
@return folded value */
|
|
UNIV_INLINE
|
|
ulint
|
|
lock_rec_fold(
|
|
/*==========*/
|
|
ulint space, /*!< in: space */
|
|
ulint page_no)/*!< in: page number */
|
|
__attribute__((const));
|
|
/*********************************************************************//**
|
|
Calculates the hash value of a page file address: used in inserting or
|
|
searching for a lock in the hash table.
|
|
@return hashed value */
|
|
UNIV_INLINE
|
|
ulint
|
|
lock_rec_hash(
|
|
/*==========*/
|
|
ulint space, /*!< in: space */
|
|
ulint page_no);/*!< in: page number */
|
|
|
|
/**********************************************************************//**
|
|
Looks for a set bit in a record lock bitmap. Returns ULINT_UNDEFINED,
|
|
if none found.
|
|
@return bit index == heap number of the record, or ULINT_UNDEFINED if
|
|
none found */
|
|
UNIV_INTERN
|
|
ulint
|
|
lock_rec_find_set_bit(
|
|
/*==================*/
|
|
const lock_t* lock); /*!< in: record lock with at least one
|
|
bit set */
|
|
|
|
/*********************************************************************//**
|
|
Gets the source table of an ALTER TABLE transaction. The table must be
|
|
covered by an IX or IS table lock.
|
|
@return the source table of transaction, if it is covered by an IX or
|
|
IS table lock; dest if there is no source table, and NULL if the
|
|
transaction is locking more than two tables or an inconsistency is
|
|
found */
|
|
UNIV_INTERN
|
|
dict_table_t*
|
|
lock_get_src_table(
|
|
/*===============*/
|
|
trx_t* trx, /*!< in: transaction */
|
|
dict_table_t* dest, /*!< in: destination of ALTER TABLE */
|
|
enum lock_mode* mode); /*!< out: lock mode of the source table */
|
|
/*********************************************************************//**
|
|
Determine if the given table is exclusively "owned" by the given
|
|
transaction, i.e., transaction holds LOCK_IX and possibly LOCK_AUTO_INC
|
|
on the table.
|
|
@return TRUE if table is only locked by trx, with LOCK_IX, and
|
|
possibly LOCK_AUTO_INC */
|
|
UNIV_INTERN
|
|
ibool
|
|
lock_is_table_exclusive(
|
|
/*====================*/
|
|
dict_table_t* table, /*!< in: table */
|
|
trx_t* trx); /*!< in: transaction */
|
|
/*********************************************************************//**
|
|
Checks if a lock request lock1 has to wait for request lock2.
|
|
@return TRUE if lock1 has to wait for lock2 to be removed */
|
|
UNIV_INTERN
|
|
ibool
|
|
lock_has_to_wait(
|
|
/*=============*/
|
|
const lock_t* lock1, /*!< in: waiting lock */
|
|
const lock_t* lock2); /*!< in: another lock; NOTE that it is
|
|
assumed that this has a lock bit set
|
|
on the same record as in lock1 if the
|
|
locks are record locks */
|
|
/*********************************************************************//**
|
|
Checks that a transaction id is sensible, i.e., not in the future.
|
|
@return TRUE if ok */
|
|
UNIV_INTERN
|
|
ibool
|
|
lock_check_trx_id_sanity(
|
|
/*=====================*/
|
|
trx_id_t trx_id, /*!< in: trx id */
|
|
const rec_t* rec, /*!< in: user record */
|
|
dict_index_t* index, /*!< in: clustered index */
|
|
const ulint* offsets, /*!< in: rec_get_offsets(rec, index) */
|
|
ibool has_kernel_mutex);/*!< in: TRUE if the caller owns the
|
|
kernel mutex */
|
|
/*********************************************************************//**
|
|
Prints info of a table lock. */
|
|
UNIV_INTERN
|
|
void
|
|
lock_table_print(
|
|
/*=============*/
|
|
FILE* file, /*!< in: file where to print */
|
|
const lock_t* lock); /*!< in: table type lock */
|
|
/*********************************************************************//**
|
|
Prints info of a record lock. */
|
|
UNIV_INTERN
|
|
void
|
|
lock_rec_print(
|
|
/*===========*/
|
|
FILE* file, /*!< in: file where to print */
|
|
const lock_t* lock); /*!< in: record type lock */
|
|
/*********************************************************************//**
|
|
Prints info of locks for all transactions.
|
|
@return FALSE if not able to obtain kernel mutex
|
|
and exits without printing info */
|
|
UNIV_INTERN
|
|
ibool
|
|
lock_print_info_summary(
|
|
/*====================*/
|
|
FILE* file, /*!< in: file where to print */
|
|
ibool nowait);/*!< in: whether to wait for the kernel mutex */
|
|
/*************************************************************************
|
|
Prints info of locks for each transaction. */
|
|
UNIV_INTERN
|
|
void
|
|
lock_print_info_all_transactions(
|
|
/*=============================*/
|
|
FILE* file); /*!< in: file where to print */
|
|
/*********************************************************************//**
|
|
Return approximate number or record locks (bits set in the bitmap) for
|
|
this transaction. Since delete-marked records may be removed, the
|
|
record count will not be precise. */
|
|
UNIV_INTERN
|
|
ulint
|
|
lock_number_of_rows_locked(
|
|
/*=======================*/
|
|
trx_t* trx); /*!< in: transaction */
|
|
/*******************************************************************//**
|
|
Check if a transaction holds any autoinc locks.
|
|
@return TRUE if the transaction holds any AUTOINC locks. */
|
|
UNIV_INTERN
|
|
ibool
|
|
lock_trx_holds_autoinc_locks(
|
|
/*=========================*/
|
|
const trx_t* trx); /*!< in: transaction */
|
|
/*******************************************************************//**
|
|
Release all the transaction's autoinc locks. */
|
|
UNIV_INTERN
|
|
void
|
|
lock_release_autoinc_locks(
|
|
/*=======================*/
|
|
trx_t* trx); /*!< in/out: transaction */
|
|
|
|
/*******************************************************************//**
|
|
Gets the type of a lock. Non-inline version for using outside of the
|
|
lock module.
|
|
@return LOCK_TABLE or LOCK_REC */
|
|
UNIV_INTERN
|
|
ulint
|
|
lock_get_type(
|
|
/*==========*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
Gets the id of the transaction owning a lock.
|
|
@return transaction id */
|
|
UNIV_INTERN
|
|
ullint
|
|
lock_get_trx_id(
|
|
/*============*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
Gets the mode of a lock in a human readable string.
|
|
The string should not be free()'d or modified.
|
|
@return lock mode */
|
|
UNIV_INTERN
|
|
const char*
|
|
lock_get_mode_str(
|
|
/*==============*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
Gets the type of a lock in a human readable string.
|
|
The string should not be free()'d or modified.
|
|
@return lock type */
|
|
UNIV_INTERN
|
|
const char*
|
|
lock_get_type_str(
|
|
/*==============*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
Gets the id of the table on which the lock is.
|
|
@return id of the table */
|
|
UNIV_INTERN
|
|
ullint
|
|
lock_get_table_id(
|
|
/*==============*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
Gets the name of the table on which the lock is.
|
|
The string should not be free()'d or modified.
|
|
@return name of the table */
|
|
UNIV_INTERN
|
|
const char*
|
|
lock_get_table_name(
|
|
/*================*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
For a record lock, gets the index on which the lock is.
|
|
@return index */
|
|
UNIV_INTERN
|
|
const dict_index_t*
|
|
lock_rec_get_index(
|
|
/*===============*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
For a record lock, gets the name of the index on which the lock is.
|
|
The string should not be free()'d or modified.
|
|
@return name of the index */
|
|
UNIV_INTERN
|
|
const char*
|
|
lock_rec_get_index_name(
|
|
/*====================*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
For a record lock, gets the tablespace number on which the lock is.
|
|
@return tablespace number */
|
|
UNIV_INTERN
|
|
ulint
|
|
lock_rec_get_space_id(
|
|
/*==================*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/*******************************************************************//**
|
|
For a record lock, gets the page number on which the lock is.
|
|
@return page number */
|
|
UNIV_INTERN
|
|
ulint
|
|
lock_rec_get_page_no(
|
|
/*=================*/
|
|
const lock_t* lock); /*!< in: lock */
|
|
|
|
/** Lock modes and types */
|
|
/* @{ */
|
|
#define LOCK_MODE_MASK 0xFUL /*!< mask used to extract mode from the
|
|
type_mode field in a lock */
|
|
/** Lock types */
|
|
/* @{ */
|
|
#define LOCK_TABLE 16 /*!< table lock */
|
|
#define LOCK_REC 32 /*!< record lock */
|
|
#define LOCK_TYPE_MASK 0xF0UL /*!< mask used to extract lock type from the
|
|
type_mode field in a lock */
|
|
#if LOCK_MODE_MASK & LOCK_TYPE_MASK
|
|
# error "LOCK_MODE_MASK & LOCK_TYPE_MASK"
|
|
#endif
|
|
|
|
#define LOCK_WAIT 256 /*!< Waiting lock flag; when set, it
|
|
means that the lock has not yet been
|
|
granted, it is just waiting for its
|
|
turn in the wait queue */
|
|
/* Precise modes */
|
|
#define LOCK_ORDINARY 0 /*!< this flag denotes an ordinary
|
|
next-key lock in contrast to LOCK_GAP
|
|
or LOCK_REC_NOT_GAP */
|
|
#define LOCK_GAP 512 /*!< when this bit is set, it means that the
|
|
lock holds only on the gap before the record;
|
|
for instance, an x-lock on the gap does not
|
|
give permission to modify the record on which
|
|
the bit is set; locks of this type are created
|
|
when records are removed from the index chain
|
|
of records */
|
|
#define LOCK_REC_NOT_GAP 1024 /*!< this bit means that the lock is only on
|
|
the index record and does NOT block inserts
|
|
to the gap before the index record; this is
|
|
used in the case when we retrieve a record
|
|
with a unique key, and is also used in
|
|
locking plain SELECTs (not part of UPDATE
|
|
or DELETE) when the user has set the READ
|
|
COMMITTED isolation level */
|
|
#define LOCK_INSERT_INTENTION 2048 /*!< this bit is set when we place a waiting
|
|
gap type record lock request in order to let
|
|
an insert of an index record to wait until
|
|
there are no conflicting locks by other
|
|
transactions on the gap; note that this flag
|
|
remains set when the waiting lock is granted,
|
|
or if the lock is inherited to a neighboring
|
|
record */
|
|
#if (LOCK_WAIT|LOCK_GAP|LOCK_REC_NOT_GAP|LOCK_INSERT_INTENTION)&LOCK_MODE_MASK
|
|
# error
|
|
#endif
|
|
#if (LOCK_WAIT|LOCK_GAP|LOCK_REC_NOT_GAP|LOCK_INSERT_INTENTION)&LOCK_TYPE_MASK
|
|
# error
|
|
#endif
|
|
/* @} */
|
|
|
|
/** Lock operation struct */
|
|
typedef struct lock_op_struct lock_op_t;
|
|
/** Lock operation struct */
|
|
struct lock_op_struct{
|
|
dict_table_t* table; /*!< table to be locked */
|
|
enum lock_mode mode; /*!< lock mode */
|
|
};
|
|
|
|
/** The lock system struct */
|
|
struct lock_sys_struct{
|
|
hash_table_t* rec_hash; /*!< hash table of the record locks */
|
|
};
|
|
|
|
/** The lock system */
|
|
extern lock_sys_t* lock_sys;
|
|
|
|
|
|
#ifndef UNIV_NONINL
|
|
#include "lock0lock.ic"
|
|
#endif
|
|
|
|
#endif
|