1990/0614/port/proc.c (diff list | history)

1990/0614/sys/src/9/port/proc.c:303,320 – 1990/0617/sys/src/9/port/proc.c:303,325 (short | long | prev | next)
Use kmap in postnote to access Proc.upage. rsc Mon Mar 20 17:14:03 2006
1990/0227		postnote(Proc *p, int dolock, char *n, int flag) { User *up;
1990/0617		KMap *k;
1990/0227		int s; Rendez *r; if(dolock) lock(&p->debug); up = (User*)(p->upage->pa|KZERO);
1990/0617		k = kmap(p->upage); up = (User*)VA(k);
1990/0227		if(flag!=NUser && (up->notify==0 || up->notified)) up->nnote = 0; /* force user's hand */ else if(up->nnote == NNOTE-1)
1990/0617		else if(up->nnote == NNOTE-1){ kunmap(k);
1990/0227		return 0;
1990/0617		}
1990/0227		strcpy(up->note[up->nnote].msg, n); up->note[up->nnote++].flag = flag;
1990/0617		kunmap(k);
1990/0227		if(dolock) unlock(&p->debug); if(r = p->r){ /* assign = */
1990/0614/sys/src/9/port/proc.c:398,404 – 1990/0617/sys/src/9/port/proc.c:403,409
1990/0227		/* * Pass info through back door, to avoid huge Proc's */
1990/03081		p->waitmsg = (Waitmsg*)(c->upage->pa|(((ulong)&w)&(BY2PG-1))|KZERO);
1990/0617		p->waitmsg = (((ulong)&w)&(BY2PG-1));
1990/03081		c->state = Exiting;
1990/0227		if(p->state == Inwait) ready(p);
1990/0614/sys/src/9/port/proc.c:499,504 – 1990/0617/sys/src/9/port/proc.c:504,510
1990/0227		pwait(Waitmsg *w) { Proc *c, *p;
1990/0617		KMap *k;
1990/0227		ulong cpid; p = u->p;
1990/0614/sys/src/9/port/proc.c:515,521 – 1990/0617/sys/src/9/port/proc.c:521,526
1990/0324		lock(&p->wait.queue); /* wait until child is finished */
1990/0227		c = p->child; if(c == 0){ print("pwait %d\n", p->pid); p->state = Inwait;
1990/0324		unlock(&p->wait.queue);
1990/0227		sched();
1990/0614/sys/src/9/port/proc.c:522,530 – 1990/0617/sys/src/9/port/proc.c:527,537
1990/0227		goto again; } p->child = 0;
1990/0617		k = kmap(c->upage);
1990/0227		if(w) *w = *p->waitmsg; cpid = p->waitmsg->pid;
1990/0617		*w = *(Waitmsg*)(p->waitmsg|VA(k)); cpid = ((Waitmsg*)(p->waitmsg|VA(k)))->pid; kunmap(k);
1990/0227		p->time[TCUser] += c->time[TUser] + c->time[TCUser]; p->time[TCSys] += c->time[TSys] + c->time[TCSys]; p->time[TCReal] += c->time[TReal];
1990/0614/sys/src/9/port/proc.c:566,573 – 1990/0617/sys/src/9/port/proc.c:573,581
1990/0227		Proc *p; int n; ulong upa; User *up;
1990/0424		int lastvar; /* used to compute stack address */
1990/0617		User *up; KMap *k;
1990/0227		/* * Kernel stack
1990/0614/sys/src/9/port/proc.c:574,590 – 1990/0617/sys/src/9/port/proc.c:582,599
1990/0227		*/ p = newproc(); p->upage = newpage(1, 0, USERADDR|(p->pid&0xFFFF)); upa = p->upage->pa|KZERO; up = (User *)upa;
1990/0617		k = kmap(p->upage); upa = VA(k); up = (User*)upa; up->p = p;
1990/0227		/* * Save time: only copy u-> data and useful stack */ memcpy((void*)upa, u, sizeof(User));
1990/0617		memcpy(up, u, sizeof(User));
1990/0227		n = USERADDR+BY2PG - (ulong)&lastvar; n = (n+32) & ~(BY2WD-1); /* be safe & word align */ memcpy((void*)(upa+BY2PG-n), (void*)((u->p->upage->pa|KZERO)+BY2PG-n), n); ((User *)upa)->p = p;
1990/0617		memcpy((void*)(upa+BY2PG-n), (void*)(USERADDR+BY2PG-n), n);
1990/0227		/* * Refs
1990/0614/sys/src/9/port/proc.c:593,598 – 1990/0617/sys/src/9/port/proc.c:602,608
1990/0227		for(n=0; n<=up->maxfd; n++) up->fd[n] = 0; up->maxfd = 0;
1990/0617		kunmap(k);
1990/0227		/* * Sched