mpool_open
mpool_open(NULL, t->bt_fd, t->bt_psize, ncache)) == NULL)
hashp->mp = mpool_open(&mpool_key, hashp->fp, hashp->hdr.bsize, csize);
MPOOL *mpool_open __P((void *, int, db_pgno_t, db_pgno_t));
MPOOL *mpool_open(void *, int, pgno_t, pgno_t);
mpool_open(NULL, t->bt_fd, t->bt_psize, ncache)) == NULL)