DB_MPOOLFILE->put()

#include <db.h>

int
DB_MPOOLFILE->put(DB_MPOOLFILE *mpf,
    void *pgaddr, DB_CACHE_PRIORITY priority, u_int32_t flags);

The DB_MPOOLFILE->put() method returns a reference to a page in the cache, setting the priority of the page as specified by the priority parameter.

The DB_MPOOLFILE->put() method returns a non-zero error value on failure and 0 on success.

Parameters

pgaddr

The pgaddr parameter is the address of the page to be returned to the cache. The pgaddr parameter must be a value previously returned by the DB_MPOOLFILE->get() method.

priority

Set the page's priority as follows:

DB_PRIORITY_UNCHANGED

The priority is unchanged.
DB_PRIORITY_VERY_LOW

The lowest priority: pages are the most likely to be discarded.
DB_PRIORITY_LOW

The next lowest priority.
DB_PRIORITY_DEFAULT

The default priority.
DB_PRIORITY_HIGH

The next highest priority.
DB_PRIORITY_VERY_HIGH

The highest priority: pages are the least likely to be discarded.

flags

The flags parameter is currently unused, and must be set to 0.

Errors

The DB_MPOOLFILE->put() method may fail and return one of the following non-zero errors:

EINVAL

An invalid flag value or parameter was specified.

Class

DB_ENV, DB_MPOOLFILE