#include <db_cxx.h>

int DbMpoolFile::put(void *pgaddr, u_int32_t flags);


The DbMpoolFile::put method indicates that the page to which pgaddr refers can be evicted from the pool. The pgaddr argument must be an address previously returned by DbMpoolFile::get.

The flags value must be set to 0 or by bitwise inclusively OR'ing together one or more of the following values:

Clear any previously set modification information (that is, don't bother writing the page back to the source file).

The page has been modified and must be written to the source file before being evicted from the pool.

The page is unlikely to be useful in the near future, and should be discarded before other pages in the pool.

The DB_MPOOL_CLEAN and DB_MPOOL_DIRTY flags are mutually exclusive.

The DbMpoolFile::put 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.


The DbMpoolFile::put method may fail and throw an exception or return a non-zero error for the following conditions:

The DB_MPOOL_DIRTY flag was set and the source file was not opened for writing.

An invalid flag value or parameter was specified.

The pgaddr argument does not refer to a page returned by DbMpoolFile::get.

More than one of the DB_MPOOL_CLEAN and DB_MPOOL_DIRTY flags was set.

The DbMpoolFile::put method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbMpoolFile::put method may fail and either return DB_RUNRECOVERY or throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.


DbEnv, DbMpoolFile

See Also

Memory Pools and Related Methods


Copyright Sleepycat Software