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
|
<! "@(#)abort.so 10.9 (Sleepycat) 1/3/99">
<!Copyright 1997, 1998 by Sleepycat Software, Inc. All rights reserved.>
<html>
<body bgcolor=white>
<head>
<title>Berkeley DB: txn_abort</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btr
ee,hash,hashing,transaction,transactions,locking,logging,access method,access me
thods,java,C,C++">
</head>
<h1>txn_abort</h1>
<hr size=1 noshade>
<tt>
<h3>
<pre>
#include <db.h>
<p>
int
txn_abort(DB_TXN *tid);
</pre>
</h3>
<h1>Description</h1>
<p>
The txn_abort function causes an abnormal termination of the transaction.
<p>
The log is played backwards and any necessary recovery operations are
initiated through the <b>recover</b> function specified to <a href="../../api_c/DbTxnMgr/open.html">txn_open</a>.
After recovery is completed, all locks held by the transaction are acquired
by the parent transaction in the case of a nested transaction or released
in the case of a non-nested transaction.
As is the case for <a href="../../api_c/DbTxn/commit.html">txn_commit</a>, applications that require strict
two-phase locking should not explicitly release any locks.
<p>
In the case of nested transactions, aborting the parent transaction causes
all children of that transaction to be aborted.
<p>
The txn_abort
function returns the value of <b>errno</b> on failure, and 0 on success.
<p>
<h1>Errors</h1>
If a fatal error occurs in Berkeley DB, the txn_abort function may fail and return
DB_RUNRECOVERY, at which point all subsequent database calls will also
return DB_RUNRECOVERY.
<p>
The txn_abort
function may fail and return <b>errno</b>
for any of the errors specified for the following Berkeley DB and C library
functions:
DBenv->tx_recover,
abort(3),
fcntl(3),
fflush(3),
fprintf(3),
free(3),
getpid(3),
<a href="../../api_c/DbLockTab/vec.html">lock_vec</a>,
<a href="../../api_c/DbLog/get.html">log_get</a>,
memset(3),
strerror(3),
vfprintf(3),
and
vsnprintf(3).
<p>
In addition, the txn_abort
function may fail and return <b>errno</b>
for the following conditions:
<dl compact>
<p><dt>EINVAL<dd>The transaction was already aborted.
</dl>
<p>
<h1>See Also</h1>
txn_abort,
<a href="../../api_c/DbTxnMgr/begin.html">txn_begin</a>,
<a href="../../api_c/DbTxnMgr/checkpoint.html">txn_checkpoint</a>,
<a href="../../api_c/DbTxnMgr/close.html">txn_close</a>,
<a href="../../api_c/DbTxn/commit.html">txn_commit</a>,
<a href="../../api_c/DbTxn/id.html">txn_id</a>,
<a href="../../api_c/DbTxnMgr/open.html">txn_open</a>,
<a href="../../api_c/DbTxn/prepare.html">txn_prepare</a>,
<a href="../../api_c/DbTxnMgr/stat.html">txn_stat</a>
and
<a href="../../api_c/DbTxnMgr/unlink.html">txn_unlink</a>.
</tt>
</body>
</html>
|
