mirror of
https://github.com/MariaDB/server.git
synced 2025-01-30 18:41:56 +01:00
103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
/*****************************************************************************
|
|
|
|
Copyright (c) 1996, 2015, Oracle and/or its affiliates. All Rights Reserved.
|
|
Copyright (c) 2017, 2020, 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/lock0lock.ic
|
|
The transaction lock system
|
|
|
|
Created 5/7/1996 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
#include "dict0dict.h"
|
|
#include "buf0buf.h"
|
|
#include "page0page.h"
|
|
|
|
/*********************************************************************//**
|
|
Gets the heap_no of the smallest user record on a page.
|
|
@return heap_no of smallest user record, or PAGE_HEAP_NO_SUPREMUM */
|
|
UNIV_INLINE
|
|
ulint
|
|
lock_get_min_heap_no(
|
|
/*=================*/
|
|
const buf_block_t* block) /*!< in: buffer block */
|
|
{
|
|
const page_t* page = block->frame;
|
|
|
|
if (page_is_comp(page)) {
|
|
return(rec_get_heap_no_new(
|
|
page
|
|
+ rec_get_next_offs(page + PAGE_NEW_INFIMUM,
|
|
TRUE)));
|
|
} else {
|
|
return(rec_get_heap_no_old(
|
|
page
|
|
+ rec_get_next_offs(page + PAGE_OLD_INFIMUM,
|
|
FALSE)));
|
|
}
|
|
}
|
|
|
|
/*************************************************************//**
|
|
Get the lock hash table */
|
|
UNIV_INLINE
|
|
hash_table_t*
|
|
lock_hash_get(
|
|
/*==========*/
|
|
ulint mode) /*!< in: lock mode */
|
|
{
|
|
if (mode & LOCK_PREDICATE) {
|
|
return &lock_sys.prdt_hash;
|
|
} else if (mode & LOCK_PRDT_PAGE) {
|
|
return &lock_sys.prdt_page_hash;
|
|
} else {
|
|
return &lock_sys.rec_hash;
|
|
}
|
|
}
|
|
|
|
/*********************************************************************//**
|
|
Creates a new record lock and inserts it to the lock queue. Does NOT check
|
|
for deadlocks or lock compatibility!
|
|
@return created lock */
|
|
UNIV_INLINE
|
|
lock_t*
|
|
lock_rec_create(
|
|
/*============*/
|
|
#ifdef WITH_WSREP
|
|
lock_t* c_lock, /*!< conflicting lock */
|
|
que_thr_t* thr, /*!< thread owning trx */
|
|
#endif
|
|
unsigned type_mode,/*!< in: lock mode and wait
|
|
flag, type is ignored and
|
|
replaced by LOCK_REC */
|
|
const buf_block_t* block, /*!< in: buffer block containing
|
|
the record */
|
|
ulint heap_no,/*!< in: heap number of the record */
|
|
dict_index_t* index, /*!< in: index of record */
|
|
trx_t* trx, /*!< in,out: transaction */
|
|
bool caller_owns_trx_mutex)
|
|
/*!< in: TRUE if caller owns
|
|
trx mutex */
|
|
{
|
|
btr_assert_not_corrupted(block, index);
|
|
return lock_rec_create_low(
|
|
#ifdef WITH_WSREP
|
|
c_lock, thr,
|
|
#endif
|
|
type_mode, block->page.id(), block->frame, heap_no,
|
|
index, trx, caller_owns_trx_mutex);
|
|
}
|