### DB_MPOOLFILE->put

`

###

    #include <db.h>

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

### Description: DB_MPOOLFILE->put

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

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

### 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

### See Also

Memory Pools and Related Methods`

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