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DbMpoolFile::set_lsn_offset
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#include &lt;db_cxx.h&gt;

int
DbMpoolFile::set(int32_t lsn_offset);

int
DbMpoolFile::get_lsn_offset(int32_t *lsn_offsetp);
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Description: DbMpoolFile::set_lsn_offset
The DbMpoolFile::set_lsn_offset method specifies the zero-based byte offset
of a log sequence number (<a href="../../db4-devel-4.7.25/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="../../db4-devel-4.7.25/api_cxx/memp_sync.html">DbEnv::memp_sync</a> documentation for more information.)
The DbMpoolFile::set_lsn_offset method configures a file in the memory pool, not only
operations performed using the specified <a href="../../db4-devel-4.7.25/api_cxx/mempfile_class.html">DbMpoolFile</a> handle.
The DbMpoolFile::set_lsn_offset method may not be called after the <a href="../../db4-devel-4.7.25/api_cxx/memp_fopen.html">DbMpoolFile::open</a> method is
called.
If the file is already open in the memory pool when
<a href="../../db4-devel-4.7.25/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.

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.

Parameters 
 lsn_offset<ul compact><li>The lsn_offset parameter is the zero-based byte offset of the
log sequence number on the file's pages.</ul>
 
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Description: DbMpoolFile::get_lsn_offset
The DbMpoolFile::get_lsn_offset method returns the log sequence number byte offset.
The DbMpoolFile::get_lsn_offset method may be called at any time during the life of the
application.
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.

Parameters 
 lsn_offsetp<ul compact><li>The DbMpoolFile::get_lsn_offset method returns the
log sequence number byte offset in lsn_offsetp.</ul>
 
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 Class
<a href="../../db4-devel-4.7.25/api_cxx/env_class.html">DbEnv</a>, <a href="../../db4-devel-4.7.25/api_cxx/mempfile_class.html">DbMpoolFile</a>
 See Also
<a href="../../db4-devel-4.7.25/api_cxx/memp_list.html">Memory Pools and Related Methods</a>
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