int loop(void){
int i;
int status = 0;
struct emwin_server *es;
es = get_next_server();
if(es == NULL){
status = 1;
log_errx("No servers available.");
log_info("Waiting %d seconds.", g.retrysleep);
for(i = 0; i <= g.retrysleep; ++i){
sleep(1);
if(get_quit_flag() != 0)
break;
}
log_info("Trying server list again.");
}else if(es->fd == -1){
if(es->gai_code != 0){
log_errx("Cannot open connection to %s. %s", es->ip,
gai_strerror(es->gai_code));
}else{
log_err2("Cannot open connection to", es->ip);
}
status = 1;
}else if(es->fd == -2){
if(server_type_serial_device(es))
log_errx("Cannot configure or synchronize %s:%s", es->ip, es->port);
else
log_errx("Could not get packet from %s", es->ip);
status = 1;
}else{
log_info("Connected to %s @ %s", es->ip, es->port);
}
while((status == 0) && (get_quit_flag() == 0)){
if(g.f_server_enabled == 1)
server_loop();
status = process_packets(es);
periodic();
if(get_reload_servers_list_flag())
reload_servers_list();
if(get_send_bbclientid_flag())
bb_send_clientid(es);
}
if(get_quit_flag() != 0)
log_info("Closing processor.");
return(status);
}
main(int argc, char **argv) {
int conns;
int i;
struct srv *s;
argc--; argv++;
nsrv = argc;
if (!nsrv)
exit(1);
srv = calloc(nsrv, sizeof(struct srv));
sw = 0;
for (i = 0; i < nsrv; i++) {
s = &srv[i];
s->num = i;
s->w = atol(argv[i]);
sw += s->w;
}
nsw = sw;
init_tree = &tree_1;
next_tree = &tree_2;
/* and insert all the servers in the PREV tree */
/* note that it is required to insert them according to
* the reverse order of their weights.
*/
printf("---------------:");
for (i = 0; i < nsrv; i++) {
s = &srv[i];
queue_by_weight_0(init_tree, s);
printf("%2d", s->w);
}
printf("\n");
p = sw; // time base of current tree
conns = 0;
while (1) {
struct eb32_node *node;
printf("%08d|%06d: ", conns, p);
/* if we have en empty tree, let's first try to collect weights
* which might have changed.
*/
if (!sw) {
if (nsw) {
sw = nsw;
p = sw;
/* do not switch trees, otherwise new servers (from init)
* would end up in next.
*/
//switch_trees();
//printf("bla\n");
}
else
goto next_iteration;
}
s = get_next_server();
if (!s) {
printf("----------- switch (empty) -- sw=%d -> %d ---------\n", sw, nsw);
switch_trees();
s = get_next_server();
printf("%08d|%06d: ", conns, p);
if (!s)
goto next_iteration;
}
else if (s->next >= 2*sw) {
printf("ARGGGGG! s[%d].next=%d, max=%d\n", s->num, s->next, 2*sw-1);
}
/* now we have THE server we want to put at this position */
for (i = 0; i < s->num; i++) {
if (srv[i].w > 0)
printf(". ");
else
printf("_ ");
}
printf("# ");
for (i = s->num + 1; i < nsrv; i++) {
if (srv[i].w > 0)
printf(". ");
else
printf("_ ");
}
printf(" : ");
printf("s=%02d v=%04d w=%03d n=%03d r=%03d ",
s->num, s->node.key, s->w, s->next, s->rem);
update_position(s);
printf(" | next=%03d, rem=%03d ", s->next, s->rem);
if (s->next >= sw * 2) {
dequeue_srv(s);
//queue_by_weight(next_tree, s);
put_srv(s);
printf(" => next (w=%d, n=%d) ", s->w, s->next);
}
else {
printf(" => curr ");
//s->node.key = s->next;
/* we want to ensure that in case of conflicts, servers with
* the highest weights will get served first. Also, we still
* have the remainder to see where the entry expected to be
* inserted.
*/
//s->node.key = 256 * s->next + 255 - s->w;
//s->node.key = sw * s->next + sw / s->w;
//s->node.key = sw * s->next + s->rem; /// seems best (check with filltab15) !
//s->node.key = (2 * sw * s->next) + s->rem + sw / s->w;
/* FIXME: must be optimized */
dequeue_srv(s);
put_srv(s);
//eb32i_insert(&tree_0, &s->node);
//s->tree = &tree_0;
}
next_iteration:
p++;
conns++;
if (/*conns == 30*/ /**/random()%100 == 0/**/) {
int w = /*20*//**/random()%4096/**/;
int num = /*1*//**/random()%nsrv/**/;
struct srv *s = &srv[num];
nsw = nsw - s->w + w;
//sw=nsw;
if (s->tree == init_tree) {
printf(" -- chgwght1(%d): %d->%d, n=%d --", s->num, s->w, w, s->next);
printf("(init)");
s->w = w;
dequeue_srv(s);
queue_by_weight_0(s->tree, s);
}
else if (s->tree == NULL) {
printf(" -- chgwght2(%d): %d->%d, n=%d --", s->num, s->w, w, s->next);
printf("(down)");
s->w = w;
dequeue_srv(s);
//queue_by_weight_0(init_tree, s);
get_srv(s);
s->next = p + (nsw + sw - p) / s->w;
put_srv(s);
}
else {
int oldnext;
/* the server is either active or in the next queue */
get_srv(s);
printf(" -- chgwght3(%d): %d->%d, n=%d, sw=%d, nsw=%d --", s->num, s->w, w, s->next, sw, nsw);
oldnext = s->next;
s->w = w;
/* we must measure how far we are from the end of the current window
* and try to fit their as many entries as should theorically be.
*/
//s->w = s->w * (2*sw - p) / sw;
if (s->w > 0) {
int step = (nsw /*+ sw - p*/) / s->w;
s->next = s->last + step;
s->rem = 0;
if (s->next > oldnext) {
s->next = oldnext;
printf(" aaaaaaa ");
}
if (s->next < p + 2) {
s->next = p + step;
printf(" bbbbbb ");
}
} else {
printf(" push -- ");
/* push it into the next tree */
s->w = 0;
s->next = p + sw;
}
dequeue_srv(s);
printf(" n=%d", s->next);
put_srv(s);
}
}
printf("\n");
if (0 && conns % 50000 == 0) {
printf("-------- %-5d : changing all weights ----\n", conns);
for (i = 0; i < nsrv; i++) {
int w = i + 1;
s = &srv[i];
nsw = nsw - s->w + w;
s->w = w;
dequeue_srv(s);
queue_by_weight_0(next_tree, s); // or init_tree ?
}
}
}
}