/*
* convert milliseconds to fast ticks
*/
uvlong
ms2fastticks(ulong ms)
{
if(!tod.init)
todinit();
return (tod.hz*ms)/1000ULL;
}
/*
* Set the time of day struct
*/
void
todset(vlong t, vlong delta, int n)
{
if(!tod.init)
todinit();
ilock(&tod);
if(t >= 0){
tod.off = t;
tod.last = fastticks(nil);
tod.lasttime = 0;
tod.delta = 0;
tod.sstart = tod.send;
} else {
if(n <= 0)
n = 1;
n *= HZ;
if(delta < 0 && n > -delta)
n = -delta;
if(delta > 0 && n > delta)
n = delta;
if (n == 0) {
iprint("todset: n == 0, delta == %lld\n", delta);
delta = 0;
} else
delta /= n;
tod.sstart = MACHP(0)->ticks;
tod.send = tod.sstart + n;
tod.delta = delta;
}
iunlock(&tod);
}
/*
* Set the time of day struct
*/
void
todset(int64_t t, int64_t delta, int n)
{
if(!tod.init)
todinit();
ilock(&tod.Lock);
if(t >= 0){
tod.off = t;
tod.last = fastticks(nil);
tod.lasttime = 0;
tod.delta = 0;
tod.sstart = tod.send;
} else {
if(n <= 0)
n = 1;
n *= HZ;
if(delta < 0 && n > -delta)
n = -delta;
if(delta > 0 && n > delta)
n = delta;
delta = delta/n;
tod.sstart = sys->ticks;
tod.send = tod.sstart + n;
tod.delta = delta;
}
iunlock(&tod.Lock);
}
/*
* convert milliseconds to fast ticks
*/
uint64_t
ms2fastticks(uint32_t ms)
{
if(!tod.init)
todinit();
return (tod.hz*ms)/1000ULL;
}
/*
* convert fast ticks to ns
*/
uvlong
fastticks2ns(uvlong ticks)
{
uvlong res;
if(!tod.init)
todinit();
mul64fract(&res, ticks, tod.multiplier);
return res;
}
/*
* convert nanoseconds to fast ticks
*/
uvlong
ns2fastticks(uvlong ns)
{
uvlong res;
if(!tod.init)
todinit();
mul64fract(&res, ns, tod.divider);
return res;
}
/*
* convert fast ticks to ns
*/
uint64_t
fastticks2ns(uint64_t ticks)
{
uint64_t res;
if(!tod.init)
todinit();
mul64fract(&res, ticks, tod.multiplier);
return res;
}
/*
* convert nanoseconds to fast ticks
*/
uint64_t
ns2fastticks(uint64_t ns)
{
uint64_t res;
if(!tod.init)
todinit();
mul64fract(&res, ns, tod.divider);
return res;
}
static void consinit(void)
{
#if 0
todinit();
#endif
/*
* at 115200 baud, the 1024 char buffer takes 56 ms to process,
* processing it every 22 ms should be fine
*/
#if 0
addclock0link(kbdputcclock, 22);
#endif
}
/*
* get time of day
*/
vlong
todget(vlong *ticksp)
{
uvlong x;
vlong ticks, diff;
ulong t;
if(!tod.init)
todinit();
/*
* we don't want time to pass twixt the measuring of fastticks
* and grabbing tod.last. Also none of the vlongs are atomic so
* we have to look at them inside the lock.
*/
ilock(&tod);
tod.cnt++;
ticks = fastticks(nil);
/* add in correction */
if(tod.sstart != tod.send){
t = MACHP(0)->ticks;
if(t >= tod.send)
t = tod.send;
tod.off = tod.off + tod.delta*(t - tod.sstart);
tod.sstart = t;
}
/* convert to epoch */
diff = ticks - tod.last;
if(diff < 0)
diff = 0;
mul64fract(&x, diff, tod.multiplier);
x += tod.off;
/* time can't go backwards */
if(x < tod.lasttime)
x = tod.lasttime;
else
tod.lasttime = x;
iunlock(&tod);
if(ticksp != nil)
*ticksp = ticks;
return x;
}
void
timersinit(void)
{
Timer *t;
/*
* T->tf == nil means the HZ clock for this processor.
*/
todinit();
t = malloc(sizeof(*t));
t->tmode = Tperiodic;
t->tt = nil;
t->tns = 1000000000/HZ;
t->tf = nil;
timeradd(t);
}
static void
consinit(void)
{
todinit();
}
static void
consinit(void)
{
todinit();
randominit();
}
