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
|
<!--$Id: memp_set_lsn_offset.so,v 10.17 2005/04/14 17:57:54 bostic Exp $-->
<!--Copyright (c) 1997,2008 Oracle. All rights reserved.-->
<!--See the file LICENSE for redistribution information.-->
<html>
<head>
<title>Berkeley DB: DbMpoolFile::set_lsn_offset</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
</head>
<body bgcolor=white>
<table width="100%"><tr valign=top>
<td>
<b>DbMpoolFile::set_lsn_offset</b>
</td>
<td align=right>
<a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a>
<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td>
</tr></table>
<hr size=1 noshade>
<tt>
<b><pre>
#include <db_cxx.h>
<p>
int
DbMpoolFile::set(int32_t lsn_offset);
<p>
int
DbMpoolFile::get_lsn_offset(int32_t *lsn_offsetp);
</pre></b>
<hr size=1 noshade>
<b>Description: DbMpoolFile::set_lsn_offset</b>
<p>The DbMpoolFile::set_lsn_offset method specifies the zero-based byte offset
of a log sequence number (<a href="../api_cxx/lsn_class.html">DbLsn</a>) on the file's pages, for the
purposes of page-flushing as part of transaction checkpoint. (See the
<a href="../api_cxx/memp_sync.html">DbEnv::memp_sync</a> documentation for more information.)</p>
<p>The DbMpoolFile::set_lsn_offset method configures a file in the memory pool, not only
operations performed using the specified <a href="../api_cxx/mempfile_class.html">DbMpoolFile</a> handle.</p>
<p>The DbMpoolFile::set_lsn_offset method may not be called after the <a href="../api_cxx/memp_fopen.html">DbMpoolFile::open</a> method is
called.
If the file is already open in the memory pool when
<a href="../api_cxx/memp_fopen.html">DbMpoolFile::open</a> is called, the information specified to DbMpoolFile::set_lsn_offset
must be consistent with the existing file or an error will be
returned.
</p>
<p>The DbMpoolFile::set_lsn_offset method
either returns a non-zero error value
or throws an exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</p>
<b>Parameters</b> <br>
<b>lsn_offset</b><ul compact><li>The <b>lsn_offset</b> parameter is the zero-based byte offset of the
log sequence number on the file's pages.</ul>
<br>
<hr size=1 noshade>
<b>Description: DbMpoolFile::get_lsn_offset</b>
<p>The DbMpoolFile::get_lsn_offset method returns the log sequence number byte offset.</p>
<p>The DbMpoolFile::get_lsn_offset method may be called at any time during the life of the
application.</p>
<p>The DbMpoolFile::get_lsn_offset method
either returns a non-zero error value
or throws an exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</p>
<b>Parameters</b> <br>
<b>lsn_offsetp</b><ul compact><li>The DbMpoolFile::get_lsn_offset method returns the
log sequence number byte offset in <b>lsn_offsetp</b>.</ul>
<br>
<hr size=1 noshade>
<br><b>Class</b>
<a href="../api_cxx/env_class.html">DbEnv</a>, <a href="../api_cxx/mempfile_class.html">DbMpoolFile</a>
<br><b>See Also</b>
<a href="../api_cxx/memp_list.html">Memory Pools and Related Methods</a>
</tt>
<table width="100%"><tr><td><br></td><td align=right>
<a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
</td></tr></table>
<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font>
</body>
</html>
|
