1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
/* Copyright (C) 2000 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;
struct st_transaction
{
LOCK_OWNER locks;
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);
int 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
|
