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79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
/*****************************************************************************
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Copyright (c) 1996, 2015, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2017, 2021, 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, Fifth Floor, 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 "dict0dict.h"
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#include "buf0buf.h"
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#include "page0page.h"
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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->page.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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Creates a new record lock and inserts it to the lock queue. Does NOT check
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for deadlocks or lock compatibility!
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@return created lock */
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UNIV_INLINE
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lock_t*
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lock_rec_create(
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/*============*/
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lock_t* c_lock, /*!< conflicting lock */
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unsigned type_mode,/*!< in: lock mode and wait flag */
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const buf_block_t* block, /*!< in: buffer block containing
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the record */
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ulint heap_no,/*!< in: heap number of the record */
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dict_index_t* index, /*!< in: index of record */
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trx_t* trx, /*!< in,out: transaction */
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bool caller_owns_trx_mutex)
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/*!< in: TRUE if caller owns
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trx mutex */
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{
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btr_assert_not_corrupted(block, index);
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return lock_rec_create_low(
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c_lock,
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type_mode, block->page.id(), block->page.frame, heap_no,
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index, trx, caller_owns_trx_mutex);
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}
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