@@ -191,24 +191,25 @@ static xid_t max(xid_t a, xid_t b) {
191191
192192static void gen_snapshot (Snapshot * s ) {
193193Transaction * t ;
194+ int n = 0 ;
194195s -> times_sent = 0 ;
195- s -> nactive = 0 ;
196- s -> xmin = MAX_XID ;
197- s -> xmax = MIN_XID ;
198- for (t = (Transaction * )active_transactions .next ;t != (Transaction * )& active_transactions ;t = (Transaction * )t -> elem .next ) {
196+ for (t = (Transaction * )active_transactions .prev ;t != (Transaction * )& active_transactions ;t = (Transaction * )t -> elem .prev ) {
197+ /*
199198if (t->xid < s->xmin) {
200199s->xmin = t->xid;
201200}
202201if (t->xid >= s->xmax) {
203202s->xmax = t->xid + 1;
204203}
205- s -> active [s -> nactive ++ ]= t -> xid ;
204+ */
205+ s -> active [n ++ ]= t -> xid ;
206206}
207- if (s -> nactive > 0 ) {
208- assert (s -> xmin < MAX_XID );
209- assert (s -> xmax > MIN_XID );
207+ s -> nactive = n ;
208+ if (n > 0 ) {
209+ s -> xmin = s -> active [0 ];
210+ s -> xmax = s -> active [n - 1 ];
210211assert (s -> xmin <=s -> xmax );
211- snapshot_sort (s );
212+ // snapshot_sort(s);
212213}else {
213214s -> xmin = s -> xmax = 0 ;
214215}