From a175314c3e5827eb193872241446f2f8f5c9d33c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 20:07:14 +0200 Subject: Adding upstream version 1:10.5.12. Signed-off-by: Daniel Baumann --- storage/maria/trnman.h | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 storage/maria/trnman.h (limited to 'storage/maria/trnman.h') diff --git a/storage/maria/trnman.h b/storage/maria/trnman.h new file mode 100644 index 00000000..588bcdf6 --- /dev/null +++ b/storage/maria/trnman.h @@ -0,0 +1,73 @@ +/* Copyright (C) 2006-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc. + + 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 */ + +#ifndef _trnman_h +#define _trnman_h + +C_MODE_START + +#include +#include "trnman_public.h" +#include "ma_loghandler_lsn.h" + +/** + trid - 6 uchar transaction identifier. Assigned when a transaction + is created. Transaction can always be identified by its trid, + even after transaction has ended. + + short_id - 2-byte transaction identifier, identifies a running + transaction, is reassigned when transaction ends. + + when short_id is 0, TRN is not initialized, for all practical purposes + it could be considered unused. + + when commit_trid is MAX_TRID the transaction is running, otherwise it's + committed. + + state_lock mutex protects the state of a TRN, that is whether a TRN + is committed/running/unused. Meaning that modifications of short_id and + commit_trid happen under this mutex. +*/ + +struct st_ma_transaction +{ + LF_PINS *pins; + WT_THD *wt; + mysql_mutex_t state_lock; + void *used_tables; /**< Table shares used by transaction */ + void *used_instances; /* table files used by transaction */ + TRN *next, *prev; + TrID trid, min_read_from, commit_trid; + LSN rec_lsn, undo_lsn; + LSN_WITH_FLAGS first_undo_lsn; + uint locked_tables; + uint16 short_id; + uint16 flags; /**< Various flags */ +}; + +#define TRANSACTION_LOGGED_LONG_ID 0x8000000000000000ULL +#define MAX_TRID (~(TrID)0) +#define MAX_INTERNAL_TRID 0xffffffffffffLL + +extern WT_RESOURCE_TYPE ma_rc_dup_unique; + +#ifdef HAVE_PSI_INTERFACE +extern PSI_mutex_key key_LOCK_trn_list, key_TRN_state_lock; +#endif + +C_MODE_END + +#endif + -- cgit v1.2.3