# DB_ENV->memp_fcreate

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    #include <db.h>

    int
    DB_ENV->memp_fcreate(DB_ENV *dbenvp, DB_MPOOLFILE **dbmfp, u_int32_t flags);

# Description

The DB_ENV->memp_fcreate function creates a DbMpoolFile structure that is the handle for a Berkeley DB shared memory buffer pool file. A pointer to this structure is returned in the memory to which dbmfp refers. Calling the DB_MPOOLFILE->close function will discard the returned handle.

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

The DB_ENV->memp_fcreate function returns a non-zero error value on failure and 0 on success.

# Errors

The DB_ENV->memp_fcreate 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 DB_ENV->memp_fcreate function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

# See Also

DB_ENV->set_cachesize, DB_ENV->set_mp_mmapsize, DB_ENV->memp_fcreate, DB_MPOOLFILE->close, DB_MPOOLFILE->get, DB_MPOOLFILE->open, DB_MPOOLFILE->put, DB_MPOOLFILE->set, DB_MPOOLFILE->sync, DB_ENV->memp_register, DB_MPOOLFILE->set_clear_len, DB_MPOOLFILE->set_fileid, DB_MPOOLFILE->set_ftype, DB_MPOOLFILE->set_lsn_offset, DB_MPOOLFILE->set_pgcookie, DB_ENV->memp_stat, DB_ENV->memp_sync, and DB_ENV->memp_trickle.`

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