/* Copyright (C) 2006 MySQL AB 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _trnman_h #define _trnman_h C_MODE_START #include <lf.h> #include "trnman_public.h" #include "ma_loghandler_lsn.h" #include <waiting_threads.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 ~(TrID)0 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_transaction { LF_PINS *pins; WT_THD wt; pthread_mutex_t state_lock; void *used_tables; /* Tables 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; }; #define TRANSACTION_LOGGED_LONG_ID ULL(0x8000000000000000) C_MODE_END #endif