static void
loopbackread(void *a)
{
Ipifc *ifc;
Block *bp;
LB *lb;
ifc = a;
lb = ifc->arg;
lb->readp = up; /* hide identity under a rock for unbind */
if(waserror()){
lb->readp = 0;
pexit("hangup", 1);
}
for(;;){
bp = qbread(lb->q, Maxtu);
if(bp == nil)
continue;
ifc->in++;
if(!canrlock(ifc)){
freeb(bp);
continue;
}
if(waserror()){
runlock(ifc);
nexterror();
}
if(ifc->lifc == nil)
freeb(bp);
else
ipiput4(lb->f, ifc, bp);
runlock(ifc);
poperror();
}
}
static void loopbackread(void *a)
{
ERRSTACK(2);
struct Ipifc *ifc;
struct block *bp;
LB *lb;
ifc = a;
lb = ifc->arg;
lb->readp = current; /* hide identity under a rock for unbind */
if (waserror()) {
lb->readp = 0;
warn("loopbackread exits unexpectedly");
return;
poperror();
}
for (;;) {
bp = qbread(lb->q, Maxtu);
if (bp == NULL)
continue;
ifc->in++;
if (!canrlock(&ifc->rwlock)) {
freeb(bp);
continue;
}
if (waserror()) {
runlock(&ifc->rwlock);
nexterror();
}
if (ifc->lifc == NULL)
freeb(bp);
else
ipiput4(lb->f, ifc, bp);
runlock(&ifc->rwlock);
poperror();
}
poperror();
}
