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ip/torrent: simplify

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This commit is contained in:
cinap_lenrek 2012-05-06 18:00:15 +02:00
parent 3997c57b57
commit 326c8d9c42
1 changed files with 11 additions and 25 deletions
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36
sys/src/cmd/ip/torrent.c
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@ -627,7 +627,7 @@ server(void)
void
client(char *ip, char *port)
{
static Dict *peers, *peerqh, *peerqt;
static Dict *peerqh, *peerqt;
static QLock peerslk;
static int nprocs;
char *addr;
@ -640,7 +640,7 @@ client(char *ip, char *port)
d = mallocz(sizeof(*d) + 64, 1);
snprint(addr = d->str, 64, "tcp!%s!%s", ip, port);
qlock(&peerslk);
if(dlook(peers, addr) || dlook(peerqh, addr)){
if(dlook(peerqh, addr)){
qunlock(&peerslk);
free(d);
return;
@ -661,31 +661,18 @@ client(char *ip, char *port)
if(rfork(RFFDG|RFPROC|RFMEM|RFNOWAIT))
return;
d = nil;
for(;;){
qlock(&peerslk);
if(d){
Dict **dd;
/* remove from peers list */
for(dd = &peers; *dd; dd = &((*dd)->next))
if(*dd == d){
*dd = d->next;
break;
}
/* enqueue to back */
d->next = nil;
if(peerqt == nil)
peerqh = d;
else
peerqt->next = d;
peerqt = d;
}
/* dequeue and put in peer list */
/* dequeue and put to tail */
if(d = peerqh){
if((peerqh = d->next) == nil)
peerqt = nil;
d->next = peers;
peers = d;
d->next = nil;
if(peerqt)
peerqt->next = d;
else
peerqh = d;
peerqt = d;
} else
nprocs--;
qunlock(&peerslk);
@ -694,11 +681,10 @@ client(char *ip, char *port)
addr = d->str;
if(debug) fprint(2, "client %s\n", addr);
if((fd = dial(addr, nil, nil, nil)) >= 0){
if(!peer(fd, 0, addr))
d = nil;
peer(fd, 0, addr);
close(fd);
}
if(d) sleep(1000+nrand(5000));
sleep(1000+nrand(5000));
}
}