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Diffstat (limited to 'storage/xtradb/lock/lock0iter.cc')
-rw-r--r-- | storage/xtradb/lock/lock0iter.cc | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/storage/xtradb/lock/lock0iter.cc b/storage/xtradb/lock/lock0iter.cc deleted file mode 100644 index 56bb69fa41c..00000000000 --- a/storage/xtradb/lock/lock0iter.cc +++ /dev/null @@ -1,111 +0,0 @@ -/***************************************************************************** - -Copyright (c) 2007, 2009, Oracle and/or its affiliates. All Rights Reserved. - -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 lock/lock0iter.cc -Lock queue iterator. Can iterate over table and record -lock queues. - -Created July 16, 2007 Vasil Dimov -*******************************************************/ - -#define LOCK_MODULE_IMPLEMENTATION - -#include "univ.i" -#include "lock0iter.h" -#include "lock0lock.h" -#include "lock0priv.h" -#include "ut0dbg.h" -#include "ut0lst.h" - -/*******************************************************************//** -Initialize lock queue iterator so that it starts to iterate from -"lock". bit_no specifies the record number within the heap where the -record is stored. It can be undefined (ULINT_UNDEFINED) in two cases: -1. If the lock is a table lock, thus we have a table lock queue; -2. If the lock is a record lock and it is a wait lock. In this case - bit_no is calculated in this function by using - lock_rec_find_set_bit(). There is exactly one bit set in the bitmap - of a wait lock. */ -UNIV_INTERN -void -lock_queue_iterator_reset( -/*======================*/ - lock_queue_iterator_t* iter, /*!< out: iterator */ - const lock_t* lock, /*!< in: lock to start from */ - ulint bit_no) /*!< in: record number in the - heap */ -{ - ut_ad(lock_mutex_own()); - - iter->current_lock = lock; - - if (bit_no != ULINT_UNDEFINED) { - - iter->bit_no = bit_no; - } else { - - switch (lock_get_type_low(lock)) { - case LOCK_TABLE: - iter->bit_no = ULINT_UNDEFINED; - break; - case LOCK_REC: - iter->bit_no = lock_rec_find_set_bit(lock); - ut_a(iter->bit_no != ULINT_UNDEFINED); - break; - default: - ut_error; - } - } -} - -/*******************************************************************//** -Gets the previous lock in the lock queue, returns NULL if there are no -more locks (i.e. the current lock is the first one). The iterator is -receded (if not-NULL is returned). -@return previous lock or NULL */ -UNIV_INTERN -const lock_t* -lock_queue_iterator_get_prev( -/*=========================*/ - lock_queue_iterator_t* iter) /*!< in/out: iterator */ -{ - const lock_t* prev_lock; - - ut_ad(lock_mutex_own()); - - switch (lock_get_type_low(iter->current_lock)) { - case LOCK_REC: - prev_lock = lock_rec_get_prev( - iter->current_lock, iter->bit_no); - break; - case LOCK_TABLE: - prev_lock = UT_LIST_GET_PREV( - un_member.tab_lock.locks, iter->current_lock); - break; - default: - ut_error; - } - - if (prev_lock != NULL) { - - iter->current_lock = prev_lock; - } - - return(prev_lock); -} |