new timeofday and interval timer stuff; itimers need testing

[unix-history] / usr / src / sys / kern / kern_time.c

/*      kern_time.c     5.3     82/09/04        */

#include "../h/param.h"
#include "../h/dir.h"           /* XXX */
#include "../h/user.h"
#include "../h/kernel.h"
#include "../h/reg.h"
#include "../h/inode.h"
#include "../h/proc.h"

gettimeofday()
{
       register struct a {
               struct  timeval *tp;
               struct  timezone *tzp;
       } *uap = (struct a *)u.u_ap;
       struct timeval atv;

       microtime(&atv);
       if (copyout((caddr_t)&atv, (caddr_t)uap->tp, sizeof (atv))) {
               u.u_error = EFAULT;
               return;
       }
       if (uap->tzp == 0)
               return;
       if (copyout((caddr_t)&tz, uap->tzp, sizeof (tz))) {
               u.u_error = EFAULT;
               return;
       }
}

settimeofday()
{
       register struct a {
               struct timeval *tv;
               struct timezone *tzp;
       } *uap = (struct a *)u.u_ap;
       struct timeval atv;
       struct timezone atz;

       if (copyin((caddr_t)uap->tv, (caddr_t)&atv, sizeof (struct timeval))) {
               u.u_error = EFAULT;
               return;
       }
       if (suser()) {
               struct timeval tdelta;

               tdelta = atv;

               timevalsub(&tdelta, &time);
               timevaladd(&boottime, &tdelta);
               time = atv;
               clockset();
       }
       if (uap->tzp) {
               if (copyin((caddr_t)uap->tzp, (caddr_t)&atz, sizeof (atz))) {
                       u.u_error = EFAULT;
                       return;
               }
               /* XXX */
       }
}

timevaladd(t1, t2)
       struct timeval *t1, *t2;
{

       t1->tv_sec += t2->tv_sec;
       t1->tv_usec += t2->tv_sec;
       timevalfix(t1);
}

timevalsub(t1, t2)
       struct timeval *t1, *t2;
{

       t1->tv_sec -= t2->tv_sec;
       t1->tv_usec -= t2->tv_sec;
       timevalfix(t1);
}

timevalfix(t1)
       struct timeval *t1;
{

       if (t1->tv_usec < 0) {
               t1->tv_sec--;
               t1->tv_usec += 1000000;
       }
       if (t1->tv_usec >= 1000000) {
               t1->tv_sec++;
               t1->tv_usec -= 1000000;
       }
}

getitimer()
{
       register struct a {
               u_int   which;
               struct  itimerval *itv;
       } *uap = (struct a *)u.u_ap;
       register struct itimerval *itp;
       int s;

       if (uap->which > 2) {
               u.u_error = EINVAL;
               return;
       }
       if (uap->which == ITIMER_REAL)
               itp = &u.u_procp->p_realtimer;
       else
               itp = &u.u_timer[uap->which];
       s = spl7();
       if (copyout((caddr_t)itp, uap->itv, sizeof (struct itimerval))) {
               u.u_error = EFAULT;
               goto bad;
       }
bad:
       splx(s);
}

setitimer()
{
       register struct a {
               u_int   which;
               struct  itimerval *itv;
       } *uap = (struct a *)u.u_ap;
       struct itimerval aitv;
       int s;

       s = spl7();
       if (uap->which > 2) {
               u.u_error = EINVAL;
               goto bad;
       }
       if (copyin((caddr_t)uap->itv, (caddr_t)&aitv,
           sizeof (struct itimerval))) {
               u.u_error = EFAULT;
               goto bad;
       }
       u.u_timer[uap->which] = aitv;
       if (uap->which == ITIMER_REAL)
               u.u_procp->p_realtimer = aitv;
bad:
       splx(s);
       return;
}

getandsetitimer()
{
       int s = spl7();

       getitimer();
       if (u.u_error == 0) {
               u.u_ap[1] = u.u_ap[2];
               setitimer();
       }
       splx(s);
}

itimerdecr(itp, usec)
       register struct itimerval *itp;
       int usec;
{

       while (itp->itimer_value.tv_usec < usec) {
               if (itp->itimer_value.tv_sec == 0)
                       goto expire;
               itp->itimer_value.tv_usec += 1000000;
               itp->itimer_value.tv_sec--;
       }
       itp->itimer_value.tv_usec -= usec;
       if (timerisset(&itp->itimer_value))
               return (1);
expire:
       if (itp->itimer_reload == 0)
               itp->itimer_value.tv_usec = 0;
       else
               itp->itimer_value = itp->itimer_interval;
       return (0);
}

#ifndef NOCOMPAT
otime()
{

       u.u_r.r_time = time.tv_sec;
}

#include "../h/timeb.h"

oftime()
{
       register struct a {
               struct  timeb   *tp;
       } *uap;
       struct timeb t;

       uap = (struct a *)u.u_ap;
       (void) spl7();
       t.time = time.tv_sec;
       t.millitm = time.tv_usec / 1000;
       (void) spl0();
       t.timezone = tz.tz_minuteswest;
       t.dstflag = tz.tz_dsttime;
       if (copyout((caddr_t)&t, (caddr_t)uap->tp, sizeof(t)) < 0)
               u.u_error = EFAULT;
}