~kris/9p

9hist

ref: 160b5d29cff5dee116ee6ddff78ba693f67eb263 9hist/bitsy/clock.c -rw-r--r-- 756 bytes
160b5d29 — David du Colombier Plan 9 from Bell Labs 2000-09-28 25 years ago 
                                                                                
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#include	"u.h"
#include	"../port/lib.h"
#include	"mem.h"
#include	"dat.h"
#include	"fns.h"
#include	"io.h"
#include	"ureg.h"
#include	"../port/error.h"

typedef struct Clock0link Clock0link;
typedef struct Clock0link {
	void		(*clock)(void);
	Clock0link*	link;
} Clock0link;

static Clock0link *clock0link;
static Lock clock0lock;

void
addclock0link(void (*clock)(void))
{
	Clock0link *lp;

	if((lp = malloc(sizeof(Clock0link))) == 0){
		print("addclock0link: too many links\n");
		return;
	}
	ilock(&clock0lock);
	lp->clock = clock;
	lp->link = clock0link;
	clock0link = lp;
	iunlock(&clock0lock);
}


vlong
fastticks(uvlong *hz)
{
	USED(hz);

	return m->ticks;
}

void
clockintr(Ureg*, void*)
{
}

void
delay(int ms)
{
	ms *= 1000;
	while(ms-->0)
		;
}