1992/0903/port/tcptimer.c (diff list | history)

1992/0807/sys/src/9/port/tcptimer.c:7,19 – 1992/0903/sys/src/9/port/tcptimer.c:7,60 (short | long | prev | next)
1991/0424		#include "arp.h" #include "ipdat.h" /* Head of running timer chain */ Timer *timers; QLock timerlock; Rendez Tcpack;
1992/0903		static Timer *timers; /* List of active timers */ static QLock tl; /* Protect timer list */ static Rendez Tcpack;
1991/0424		Rendez tcpflowr;
1992/0903		static void deltimer(Timer *t) { if(timers == t) timers = t->next; if(t->next) t->next->prev = t->prev; if(t->prev) t->prev->next = t->next; } /* * Poke each tcp connection to recompute window size and * acknowledgement timer */
1991/0424		void
1992/0903		tcpflow(void *x) { Ipifc *ifc; Ipconv *cp, **p, **etab; ifc = x; etab = &ifc->conv[Nipconv]; for(;;) { sleep(&tcpflowr, return0, 0); for(p = ifc->conv; p < etab; p++) { cp = *p; if(cp == 0) break; if(cp->readq && cp->ref != 0 && !QFULL(cp->readq->next)) { tcprcvwin(cp); tcpacktimer(cp); } } } } void
1991/0424		tcpackproc(void *junk) { Timer *t,*tp;
1992/0807/sys/src/9/port/tcptimer.c:23,52 – 1992/0903/sys/src/9/port/tcptimer.c:64,81
1991/0424		for(;;) { expired = 0; qlock(&timerlock);
1992/0903		qlock(&tl);
1991/0424		for(t = timers;t != 0; t = tp) { tp = t->next; if(tp == t) panic("Timer loop at %lux\n",(long)tp);
1992/0314		if(t->state == TIMER_RUN) if(--(t->count) == 0){
1991/0424		/* Delete from active timer list */ if(timers == t) timers = t->next; if(t->next != 0) t->next->prev = t->prev; if(t->prev != 0) t->prev->next = t->next;
1992/0903		deltimer(t);
1991/0424		t->state = TIMER_EXPIRE; /* Put on head of expired timer list */ t->next = expired; expired = t; } } qunlock(&timerlock);
1992/0903		qunlock(&tl);
1991/0424
1992/0314		for(;;) { t = expired;
1992/0807/sys/src/9/port/tcptimer.c:58,133 – 1992/0903/sys/src/9/port/tcptimer.c:87,124
1992/0314		if(t->func)
1991/0424		(*t->func)(t->arg); }                  tsleep(&Tcpack, return0, 0, MSPTICK); } } void start_timer(Timer *t)
1992/0903		tcpgo(Timer *t)
1991/0424		{                  if(t == 0 || t->start == 0) return; qlock(&timerlock);
1992/0903		qlock(&tl);
1991/0424		t->count = t->start; if(t->state != TIMER_RUN){
1992/0903		if(t->state != TIMER_RUN) {
1991/0424		t->state = TIMER_RUN; /* Put on head of active timer list */ t->prev = 0; t->next = timers; if(t->next != 0)
1992/0903		if(t->next)
1991/0424		t->next->prev = t; timers = t; } qunlock(&timerlock);
1992/0903		qunlock(&tl);
1991/0424		} void stop_timer(Timer *t)
1992/0903		tcphalt(Timer *t)
1991/0424		{ if(t == 0) return; qlock(&timerlock);                  if(t->state == TIMER_RUN){ /* Delete from active timer list */ if(timers == t) timers = t->next; if(t->next != 0) t->next->prev = t->prev; if(t->prev != 0) t->prev->next = t->next; }
1992/0903		qlock(&tl); if(t->state == TIMER_RUN) deltimer(t);
1991/0424		t->state = TIMER_STOP;                  qunlock(&timerlock);
1992/0903		qunlock(&tl);
1991/0424		}                  void
1992/0626		tcpflow(void *x)
1991/0424		{
1992/0626		Ipifc *ifc; Ipconv *cp, **p, **etab;
1991/0424
1992/0626		ifc = x; etab = &ifc->conv[Nipconv];
1992/0807
1991/0424		for(;;) { sleep(&tcpflowr, return0, 0);
1992/0626		for(p = ifc->conv; p < etab; p++) { cp = *p; if(cp == 0) break;
1992/0807		if(cp->readq && cp->ref != 0 && !QFULL(cp->readq->next)) {
1992/0626		tcprcvwin(cp); tcp_acktimer(cp);
1991/0424		} } } }