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/*-------------------------------------------------------------------------
*
* port.c--
* SCO 3.2v5.0.2 specific routines
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* /usr/local/devel/pglite/cvs/src/backend/port/svr4/port.c,v 1.2 1995/03/17 06:40:19 andrew Exp
*
*-------------------------------------------------------------------------
*/
#include <unistd.h>
#include <math.h> /* for pow() prototype */
#include <errno.h>
#include "rusagestub.h"
int
getrusage(int who, struct rusage * rusage)
{
struct tms tms;
register int tick_rate = CLK_TCK; /* ticks per second */
clock_t u,
s;
if (rusage == (struct rusage *) NULL)
{
errno = EFAULT;
return (-1);
}
if (times(&tms) < 0)
{
/* errno set by times */
return (-1);
}
switch (who)
{
case RUSAGE_SELF:
u = tms.tms_utime;
s = tms.tms_stime;
break;
case RUSAGE_CHILDREN:
u = tms.tms_cutime;
s = tms.tms_cstime;
break;
default:
errno = EINVAL;
return (-1);
}
#define TICK_TO_SEC(T, RATE) ((T)/(RATE))
#define TICK_TO_USEC(T,RATE) (((T)%(RATE)*1000000)/RATE)
rusage->ru_utime.tv_sec = TICK_TO_SEC(u, tick_rate);
rusage->ru_utime.tv_usec = TICK_TO_USEC(u, tick_rate);
rusage->ru_stime.tv_sec = TICK_TO_SEC(s, tick_rate);
rusage->ru_stime.tv_usec = TICK_TO_USEC(u, tick_rate);
return (0);
}
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