#include <db.h>

int
memp_fput(DB_MPOOLFILE *mpf, void *pgaddr, u_int32_t flags);

Description

The memp_fput function indicates that the page to which pgaddr refers can be evicted from the pool. The pgaddr argument must be an address previously returned by memp_fget.

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

DB_MPOOL_CLEAN

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

DB_MPOOL_DIRTY

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

DB_MPOOL_DISCARD

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 memp_fput function returns a non-zero error value on failure and 0 on success.

Errors

The memp_fput function may fail and return a non-zero error for the following conditions:

EACCES

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

EINVAL

An invalid flag value or parameter was specified.

The pgaddr argument does not refer to a page returned by memp_fget.

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

The memp_fput function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the memp_fput function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

See Also