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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <cstring>
namespace drizzled {
extern uint32_t server_id;
/**
class XID _may_ be binary compatible with the XID structure as
in the X/Open CAE Specification, Distributed Transaction Processing:
The XA Specification, X/Open Company Ltd., 1991.
http://www.opengroup.org/bookstore/catalog/c193.htm
*/
typedef uint64_t my_xid;
#define DRIZZLE_XIDDATASIZE 128
#define DRIZZLE_XID_PREFIX "DrizzleXid"
#define DRIZZLE_XID_PREFIX_LEN 8 // must be a multiple of 8
#define DRIZZLE_XID_OFFSET (DRIZZLE_XID_PREFIX_LEN+sizeof(server_id))
#define DRIZZLE_XID_GTRID_LEN (DRIZZLE_XID_OFFSET+sizeof(my_xid))
class XID
{
public:
long formatID;
long gtrid_length;
long bqual_length;
char data[DRIZZLE_XIDDATASIZE]; // not \0-terminated !
XID() :
formatID(-1), /* -1 == null */
gtrid_length(0),
bqual_length(0)
{
memset(data, 0, DRIZZLE_XIDDATASIZE);
}
void set(uint64_t xid);
void set(long g, long b, const char *d);
bool is_null() const;
void set_null();
my_xid quick_get_my_xid();
my_xid get_my_xid();
uint32_t length() const;
};
/**
struct st_DrizzleXid is binary compatible with the XID structure as
in the X/Open CAE Specification, Distributed Transaction Processing:
The XA Specification, X/Open Company Ltd., 1991.
http://www.opengroup.org/bookstore/catalog/c193.htm
*/
class DrizzleXid
{
public:
long formatID;
long gtrid_length;
long bqual_length;
char data[DRIZZLE_XIDDATASIZE]; /* Not \0-terminated */
DrizzleXid() :
formatID(0),
gtrid_length(0),
bqual_length(0)
{
memset(data, 0, DRIZZLE_XIDDATASIZE);
}
};
enum xa_states {XA_NOTR=0, XA_ACTIVE, XA_IDLE, XA_PREPARED};
extern const char *xa_state_names[];
/* for recover() plugin::StorageEngine call */
#define MIN_XID_LIST_SIZE 128
#define MAX_XID_LIST_SIZE (1024*128)
class XID_STATE
{
public:
XID_STATE() :
xa_state(XA_NOTR),
in_session(false)
{}
/* For now, this is only used to catch duplicated external xids */
XID xid; // transaction identifier
xa_states xa_state; // used by external XA only
bool in_session;
};
} /* namespace drizzled */
|