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
|
/*
* Simple transactions API
*
* Copyright (c) 2021 Virtuozzo International GmbH.
*
* Author:
* Sementsov-Ogievskiy Vladimir <vsementsov@virtuozzo.com>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/transactions.h"
#include "qemu/queue.h"
typedef struct TransactionAction {
TransactionActionDrv *drv;
void *opaque;
QSLIST_ENTRY(TransactionAction) entry;
} TransactionAction;
struct Transaction {
QSLIST_HEAD(, TransactionAction) actions;
};
Transaction *tran_new(void)
{
Transaction *tran = g_new(Transaction, 1);
QSLIST_INIT(&tran->actions);
return tran;
}
void tran_add(Transaction *tran, TransactionActionDrv *drv, void *opaque)
{
TransactionAction *act;
act = g_new(TransactionAction, 1);
*act = (TransactionAction) {
.drv = drv,
.opaque = opaque
};
QSLIST_INSERT_HEAD(&tran->actions, act, entry);
}
void tran_abort(Transaction *tran)
{
TransactionAction *act, *next;
QSLIST_FOREACH(act, &tran->actions, entry) {
if (act->drv->abort) {
act->drv->abort(act->opaque);
}
}
QSLIST_FOREACH_SAFE(act, &tran->actions, entry, next) {
if (act->drv->clean) {
act->drv->clean(act->opaque);
}
g_free(act);
}
g_free(tran);
}
void tran_commit(Transaction *tran)
{
TransactionAction *act, *next;
QSLIST_FOREACH(act, &tran->actions, entry) {
if (act->drv->commit) {
act->drv->commit(act->opaque);
}
}
QSLIST_FOREACH_SAFE(act, &tran->actions, entry, next) {
if (act->drv->clean) {
act->drv->clean(act->opaque);
}
g_free(act);
}
g_free(tran);
}
|
