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89d80c1b0b
Define my_thread_id as an unsigned type, to avoid mismatch with ulonglong. Change some parameters to this type. Use size_t in a few more places. Declare many flag constants as unsigned to avoid sign mismatch when shifting bits or applying the unary ~ operator. When applying the unary ~ operator to enum constants, explictly cast the result to an unsigned type, because enum constants can be treated as signed. In InnoDB, change the source code line number parameters from ulint to unsigned type. Also, make some InnoDB functions return a narrower type (unsigned or uint32_t instead of ulint; bool instead of ibool).
132 lines
3.9 KiB
Text
132 lines
3.9 KiB
Text
/*****************************************************************************
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Copyright (c) 1996, 2015, 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/lock0lock.ic
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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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#include "srv0srv.h"
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#include "dict0dict.h"
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#include "row0row.h"
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#include "trx0sys.h"
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#include "trx0trx.h"
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#include "buf0buf.h"
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#include "page0page.h"
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#include "page0cur.h"
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#include "row0vers.h"
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#include "que0que.h"
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#include "btr0cur.h"
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#include "read0read.h"
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#include "log0recv.h"
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/*********************************************************************//**
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Calculates the fold value of a page file address: used in inserting or
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searching for a lock in the hash table.
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@return folded value */
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UNIV_INLINE
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ulint
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lock_rec_fold(
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/*==========*/
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ulint space, /*!< in: space */
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ulint page_no)/*!< in: page number */
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{
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return(ut_fold_ulint_pair(space, page_no));
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}
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/*********************************************************************//**
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Calculates the hash value of a page file address: used in inserting or
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searching for a lock in the hash table.
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@return hashed value */
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UNIV_INLINE
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unsigned
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lock_rec_hash(
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/*==========*/
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ulint space, /*!< in: space */
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ulint page_no)/*!< in: page number */
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{
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return(unsigned(hash_calc_hash(lock_rec_fold(space, page_no),
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lock_sys->rec_hash)));
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}
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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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const page_t* page = block->frame;
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if (page_is_comp(page)) {
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return(rec_get_heap_no_new(
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page
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+ rec_get_next_offs(page + PAGE_NEW_INFIMUM,
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TRUE)));
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} else {
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return(rec_get_heap_no_old(
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page
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+ rec_get_next_offs(page + PAGE_OLD_INFIMUM,
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FALSE)));
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}
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}
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/*************************************************************//**
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Moves the locks of a record to another record and resets the lock bits of
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the donating record. */
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UNIV_INLINE
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void
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lock_rec_move(
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/*==========*/
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const buf_block_t* receiver, /*!< in: buffer block containing
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the receiving record */
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const buf_block_t* donator, /*!< in: buffer block containing
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the donating record */
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ulint receiver_heap_no,/*!< in: heap_no of the record
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which gets the locks; there
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must be no lock requests
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on it! */
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ulint donator_heap_no)/*!< in: heap_no of the record
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which gives the locks */
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{
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lock_rec_move_low(lock_sys->rec_hash, receiver, donator,
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receiver_heap_no, donator_heap_no);
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}
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/*************************************************************//**
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Get the lock hash table */
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UNIV_INLINE
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hash_table_t*
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lock_hash_get(
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/*==========*/
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ulint mode) /*!< in: lock mode */
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{
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if (mode & LOCK_PREDICATE) {
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return(lock_sys->prdt_hash);
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} else if (mode & LOCK_PRDT_PAGE) {
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return(lock_sys->prdt_page_hash);
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} else {
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return(lock_sys->rec_hash);
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}
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}
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