void journal_trim_set_callback(journal *jnl, jnl_trim_callback_t callback, void *arg);
int journal_trim_extent_overlap (journal *jnl, uint64_t offset, uint64_t length, uint64_t *end);
/* Mark state in the journal that requests an immediate journal flush upon txn completion */
void journal_trim_set_callback(journal *jnl, jnl_trim_callback_t callback, void *arg);
int journal_trim_extent_overlap (journal *jnl, uint64_t offset, uint64_t length, uint64_t *end);
/* Mark state in the journal that requests an immediate journal flush upon txn completion */