sbd_pgr_do_reserve
sbd_pgr_do_reserve(pgr, key, it, ses, pr_out);
sbd_pgr_do_reserve(pgr, key, it, ses, pr_out);
sbd_pgr_do_reserve(pgr, key, it, ses, pr_out);
static void sbd_pgr_do_reserve(sbd_pgr_t *, sbd_pgr_key_t *, sbd_it_data_t *it,