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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*****************************************************************************
Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved.
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 Street, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/**************************************************//**
@file include/trx0trx.ic
The transaction
Created 3/26/1996 Heikki Tuuri
*******************************************************/
/**********************************************************************//**
Determines if a transaction is in the given state.
The caller must hold trx_sys->mutex, or it must be the thread
that is serving a running transaction.
A running transaction must be in trx_sys->ro_trx_list or trx_sys->rw_trx_list
unless it is a non-locking autocommit read only transaction, which is only
in trx_sys->mysql_trx_list.
@return TRUE if trx->state == state */
UNIV_INLINE
ibool
trx_state_eq(
/*=========*/
const trx_t* trx, /*!< in: transaction */
trx_state_t state) /*!< in: state;
if state != TRX_STATE_NOT_STARTED
asserts that
trx->state != TRX_STATE_NOT_STARTED */
{
#ifdef UNIV_DEBUG
switch (trx->state) {
case TRX_STATE_PREPARED:
assert_trx_in_rw_list(trx);
return(trx->state == state);
case TRX_STATE_ACTIVE:
assert_trx_nonlocking_or_in_list(trx);
return(state == trx->state);
case TRX_STATE_COMMITTED_IN_MEMORY:
assert_trx_in_list(trx);
return(state == trx->state);
case TRX_STATE_NOT_STARTED:
/* This state is not allowed for running transactions. */
ut_a(state == TRX_STATE_NOT_STARTED);
ut_ad(!trx->in_rw_trx_list);
ut_ad(!trx->in_ro_trx_list);
return(state == trx->state);
}
ut_error;
#endif /* UNIV_DEBUG */
return(trx->state == state);
}
/****************************************************************//**
Retrieves the error_info field from a trx.
@return the error info */
UNIV_INLINE
const dict_index_t*
trx_get_error_info(
/*===============*/
const trx_t* trx) /*!< in: trx object */
{
return(trx->error_info);
}
/*******************************************************************//**
Retrieves transaction's que state in a human readable string. The string
should not be free()'d or modified.
@return string in the data segment */
UNIV_INLINE
const char*
trx_get_que_state_str(
/*==================*/
const trx_t* trx) /*!< in: transaction */
{
/* be sure to adjust TRX_QUE_STATE_STR_MAX_LEN if you change this */
switch (trx->lock.que_state) {
case TRX_QUE_RUNNING:
return("RUNNING");
case TRX_QUE_LOCK_WAIT:
return("LOCK WAIT");
case TRX_QUE_ROLLING_BACK:
return("ROLLING BACK");
case TRX_QUE_COMMITTING:
return("COMMITTING");
default:
return("UNKNOWN");
}
}
/**********************************************************************//**
Determine if a transaction is a dictionary operation.
@return dictionary operation mode */
UNIV_INLINE
enum trx_dict_op
trx_get_dict_operation(
/*===================*/
const trx_t* trx) /*!< in: transaction */
{
enum trx_dict_op op = (enum trx_dict_op) trx->dict_operation;
#ifdef UNIV_DEBUG
switch (op) {
case TRX_DICT_OP_NONE:
case TRX_DICT_OP_TABLE:
case TRX_DICT_OP_INDEX:
return(op);
}
ut_error;
#endif /* UNIV_DEBUG */
return((enum trx_dict_op) op);
}
/**********************************************************************//**
Flag a transaction a dictionary operation. */
UNIV_INLINE
void
trx_set_dict_operation(
/*===================*/
trx_t* trx, /*!< in/out: transaction */
enum trx_dict_op op) /*!< in: operation, not
TRX_DICT_OP_NONE */
{
#ifdef UNIV_DEBUG
enum trx_dict_op old_op = trx_get_dict_operation(trx);
switch (op) {
case TRX_DICT_OP_NONE:
ut_error;
break;
case TRX_DICT_OP_TABLE:
switch (old_op) {
case TRX_DICT_OP_NONE:
case TRX_DICT_OP_INDEX:
case TRX_DICT_OP_TABLE:
goto ok;
}
ut_error;
break;
case TRX_DICT_OP_INDEX:
ut_ad(old_op == TRX_DICT_OP_NONE);
break;
}
ok:
#endif /* UNIV_DEBUG */
trx->dict_operation = op;
}
/********************************************************************//**
Releases the search latch if trx has reserved it. */
UNIV_INLINE
void
trx_search_latch_release_if_reserved(
/*=================================*/
trx_t* trx) /*!< in: transaction */
{
if (trx->has_search_latch) {
rw_lock_s_unlock(&btr_search_latch);
trx->has_search_latch = FALSE;
}
}
|
