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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/* -*- 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
*/
#ifndef DRIZZLED_XID_H
#define DRIZZLED_XID_H
#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 "MySQLXid"
#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);
}
bool eq(XID *xid);
bool eq(long g, long b, const char *d);
void set(XID *xid);
void set(long f, const char *g, long gl, const char *b, long bl);
void set(uint64_t xid);
void set(long g, long b, const char *d);
bool is_null();
void null();
my_xid quick_get_my_xid();
my_xid get_my_xid();
uint32_t length();
unsigned char *key();
uint32_t key_length();
};
/**
struct st_drizzle_xid 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 drizzle_xid {
public:
long formatID;
long gtrid_length;
long bqual_length;
char data[DRIZZLE_XIDDATASIZE]; /* Not \0-terminated */
drizzle_xid() :
formatID(0),
gtrid_length(0),
bqual_length(0)
{
memset(data, 0, DRIZZLE_XIDDATASIZE);
}
};
typedef class drizzle_xid DRIZZLE_XID;
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() :
xid(),
xa_state(XA_NOTR),
in_session(false)
{}
/* For now, this is only used to catch duplicated external xids */
XID xid; // transaction identifier
enum xa_states xa_state; // used by external XA only
bool in_session;
};
bool xid_cache_init(void);
void xid_cache_free(void);
XID_STATE *xid_cache_search(XID *xid);
bool xid_cache_insert(XID *xid, enum xa_states xa_state);
bool xid_cache_insert(XID_STATE *xid_state);
void xid_cache_delete(XID_STATE *xid_state);
} /* namespace drizzled */
#endif /* DRIZZLED_XID_H */
|