42 lines
621 B
C
42 lines
621 B
C
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <sys/times.h>
|
|
#include <sys/types.h>
|
|
#include <minix/u64.h>
|
|
#include <minix/config.h>
|
|
#include <minix/const.h>
|
|
|
|
#include "sysutil.h"
|
|
|
|
static u32_t Hz;
|
|
|
|
u32_t
|
|
sys_hz(void)
|
|
{
|
|
if(Hz <= 0) {
|
|
int r;
|
|
/* Get HZ. */
|
|
if((r=sys_getinfo(GET_HZ, &Hz, sizeof(Hz), 0, 0)) != OK) {
|
|
Hz = DEFAULT_HZ;
|
|
printf("sys_hz: %d: reverting to HZ = %d\n", r, Hz);
|
|
}
|
|
}
|
|
|
|
return Hz;
|
|
}
|
|
|
|
u32_t
|
|
micros_to_ticks(u32_t micros)
|
|
{
|
|
u32_t ticks;
|
|
|
|
ticks = div64u(mul64u(micros, sys_hz()), 1000000);
|
|
if(ticks < 1) ticks = 1;
|
|
|
|
return ticks;
|
|
}
|
|
|
|
|