/* 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; either version 2 of the License, or (at your option) any later version. 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 #include "lockman.h" typedef uint64 TrID; /* our TrID is 6 bytes */ typedef struct st_transaction TRN; /* trid - 6 byte transaction identifier. Assigned when a transaction is created. Transaction can always be identified by its trid, even after transaction has ended. short_trid - 2-byte transaction identifier, identifies a running transaction, is reassigned when transaction ends. */ struct st_transaction { LOCK_OWNER locks; /* must be the first! see short_trid_to_TRN() */ LF_PINS *pins; TrID trid, min_read_from, commit_trid; TRN *next, *prev; /* Note! if locks.loid is 0, trn is NOT initialized */ }; #define SHORT_TRID_MAX 65535 extern uint trnman_active_transactions, trnman_allocated_transactions; int trnman_init(void); void trnman_destroy(void); TRN *trnman_new_trn(pthread_mutex_t *mutex, pthread_cond_t *cond); void trnman_end_trn(TRN *trn, my_bool commit); #define trnman_commit_trn(T) trnman_end_trn(T, TRUE) #define trnman_abort_trn(T) trnman_end_trn(T, FALSE) void trnman_free_trn(TRN *trn); my_bool trnman_can_read_from(TRN *trn, TrID trid); #endif