o5r/plan9port
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Add support for user-level 9P servers/clients and various bug fixes to go with them.

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This commit is contained in:
rsc 2003-12-11 17:48:38 +00:00
parent ac244f8d28
commit 32f69c36e0
60 changed files with 965 additions and 485 deletions
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28
src/libthread/sched.c
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@ -98,17 +98,18 @@ runthread(Proc *p)
q = &p->ready;
lock(&p->readylock);
if(q->head == nil){
q->asleep = 1;
if(p->idle){
if(p->idle->state != Ready){
fprint(2, "everyone is asleep\n");
exits("everyone is asleep");
}
unlock(&p->readylock);
_threaddebug(DBGSCHED, "running idle thread", p->nthreads);
return p->idle;
}
_threaddebug(DBGSCHED, "sleeping for more work (%d threads)", p->nthreads);
q->asleep = 1;
unlock(&p->readylock);
while(rendezvous((ulong)q, 0) == ~0){
if(_threadexitsallstatus)
@ -148,7 +149,7 @@ Resched:
_threaddelproc();
_schedexit(p);
}
// _threaddebug(DBGSCHED, "running %d.%d", t->proc->pid, t->id);
_threaddebug(DBGSCHED, "running %d.%d", t->proc->pid, t->id);
p->thread = t;
if(t->moribund){
_threaddebug(DBGSCHED, "%d.%d marked to die");
@ -176,8 +177,10 @@ _threadready(Thread *t)
{
Tqueue *q;
if(t == t->proc->idle)
if(t == t->proc->idle){
_threaddebug(DBGSCHED, "idle thread is ready");
return;
}
assert(t->state == Ready);
_threaddebug(DBGSCHED, "readying %d.%d", t->proc->pid, t->id);
@ -206,18 +209,25 @@ void
_threadidle(void)
{
Tqueue *q;
Thread *t;
Thread *t, *idle;
Proc *p;
p = _threadgetproc();
q = &p->ready;
lock(&p->readylock);
assert(q->head);
t = q->head;
q->head = t->next;
if(q->tail == t)
assert(q->tail);
idle = q->tail;
if(q->head == idle){
q->head = nil;
q->tail = nil;
p->idle = t;
}else{
for(t=q->head; t->next!=q->tail; t=t->next)
;
t->next = nil;
q->tail = t;
}
p->idle = idle;
_threaddebug(DBGSCHED, "p->idle is %d\n", idle->id);
unlock(&p->readylock);
}