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Berkeley DB: DbMpoolFile::set_pgcookie
DbMpoolFile::set_pgcookie
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#include <db_cxx.h>
int
DbMpoolFile::set(DBT *pgcookie);
int
DbMpoolFile::get_pgcookie(DBT *dbt);
Description: DbMpoolFile::set_pgcookie
The DbMpoolFile::set_pgcookie method specifies a byte string that is provided
to the functions registered to do input or output processing of the
file's pages as they are read from or written to, the backing filesystem
store. (See the DbEnv::memp_register documentation for more
information.)
The DbMpoolFile::set_pgcookie method configures a file in the memory pool, not only
operations performed using the specified DbMpoolFile handle.
The DbMpoolFile::set_pgcookie method may not be called after the DbMpoolFile::open method is
called.
If the file is already open in the memory pool when
DbMpoolFile::open is called, the information specified to DbMpoolFile::set_pgcookie
will replace the existing information.
The DbMpoolFile::set_pgcookie 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
- pgcookie
- The pgcookie parameter is a byte string provided to the
functions registered to do input or output processing of the file's
pages.
Description: DbMpoolFile::get_pgcookie
The DbMpoolFile::get_pgcookie method returns the .
The DbMpoolFile::get_pgcookie method may be called at any time during the life of the
application.
Class
DbEnv, DbMpoolFile
See Also
Memory Pools and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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