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/* proctm.c
Get the time spent in the process.
Copyright (C) 1992, 1993 Ian Lance Taylor
This file is part of the Taylor UUCP package.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
The author of the program may be contacted at ian@airs.com.
*/
#include "uucp.h"
#include "sysdep.h"
#include "system.h"
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#if HAVE_LIMITS_H
#include <limits.h>
#endif
/* Prefer gettimeofday to ftime to times. */
#if HAVE_GETTIMEOFDAY || HAVE_FTIME
#undef HAVE_TIMES
#define HAVE_TIMES 0
#endif
#if HAVE_GETTIMEOFDAY
#undef HAVE_FTIME
#define HAVE_FTIME 0
#endif
#if HAVE_TIME_H && (TIME_WITH_SYS_TIME || ! HAVE_GETTIMEOFDAY)
#include <time.h>
#endif
#if HAVE_GETTIMEOFDAY
#include <sys/time.h>
#endif
#if HAVE_FTIME
#include <sys/timeb.h>
#endif
#if HAVE_TIMES
#if HAVE_SYS_TIMES_H
#include <sys/times.h>
#endif
#if TIMES_DECLARATION_OK
/* We use a macro to protect this because times really returns clock_t
and on some systems, such as Ultrix 4.0, clock_t is int. We don't
leave it out entirely because on some systems, such as System III,
the declaration is necessary for correct compilation. */
#ifndef times
extern long times ();
#endif
#endif /* TIMES_DECLARATION_OK */
#ifdef _SC_CLK_TCK
#define HAVE_SC_CLK_TCK 1
#else
#define HAVE_SC_CLK_TCK 0
#endif
/* TIMES_TICK may have been set in policy.h, or we may be able to get
it using sysconf. If neither is the case, try to find a useful
definition from the system header files. */
#if TIMES_TICK == 0 && (! HAVE_SYSCONF || ! HAVE_SC_CLK_TCK)
#ifdef CLK_TCK
#undef TIMES_TICK
#define TIMES_TICK CLK_TCK
#else /* ! defined (CLK_TCK) */
#ifdef HZ
#undef TIMES_TICK
#define TIMES_TICK HZ
#endif /* defined (HZ) */
#endif /* ! defined (CLK_TCK) */
#endif /* TIMES_TICK == 0 && (! HAVE_SYSCONF || ! HAVE_SC_CLK_TCK) */
#endif /* HAVE_TIMES */
#ifndef time
extern time_t time ();
#endif
#if HAVE_SYSCONF
#ifndef sysconf
extern long sysconf ();
#endif
#endif
/* Get the time in seconds and microseconds; this need only work
within the process when called from the system independent code.
It is also called by ixsysdep_time. */
long
ixsysdep_process_time (pimicros)
long *pimicros;
{
#if HAVE_GETTIMEOFDAY
struct timeval stime;
struct timezone stz;
(void) gettimeofday (&stime, &stz);
if (pimicros != NULL)
*pimicros = (long) stime.tv_usec;
return (long) stime.tv_sec;
#endif /* HAVE_GETTIMEOFDAY */
#if HAVE_FTIME
static boolean fbad;
if (! fbad)
{
struct timeb stime;
static struct timeb slast;
(void) ftime (&stime);
/* On some systems, such as SCO 3.2.2, ftime can go backwards in
time. If we detect this, we switch to using time. */
if (slast.time != 0
&& (stime.time < slast.time
|| (stime.time == slast.time &&
stime.millitm < slast.millitm)))
fbad = TRUE;
else
{
slast = stime;
if (pimicros != NULL)
*pimicros = (long) stime.millitm * (long) 1000;
return (long) stime.time;
}
}
if (pimicros != NULL)
*pimicros = 0;
return (long) time ((time_t *) NULL);
#endif /* HAVE_FTIME */
#if HAVE_TIMES
struct tms s;
long i;
static int itick;
if (itick == 0)
{
#if TIMES_TICK == 0
#if HAVE_SYSCONF && HAVE_SC_CLK_TCK
itick = (int) sysconf (_SC_CLK_TCK);
#else /* ! HAVE_SYSCONF || ! HAVE_SC_CLK_TCK */
const char *z;
z = getenv ("HZ");
if (z != NULL)
itick = (int) strtol (z, (char **) NULL, 10);
/* If we really couldn't get anything, just use 60. */
if (itick == 0)
itick = 60;
#endif /* ! HAVE_SYSCONF || ! HAVE_SC_CLK_TCK */
#else /* TIMES_TICK != 0 */
itick = TIMES_TICK;
#endif /* TIMES_TICK == 0 */
}
i = (long) times (&s);
if (pimicros != NULL)
*pimicros = (i % (long) itick) * ((long) 1000000 / (long) itick);
return i / (long) itick;
#endif /* HAVE_TIMES */
#if ! HAVE_GETTIMEOFDAY && ! HAVE_FTIME && ! HAVE_TIMES
if (pimicros != NULL)
*pimicros = 0;
return (long) time ((time_t *) NULL);
#endif /* ! HAVE_GETTIMEOFDAY && ! HAVE_FTIME && ! HAVE_TIMES */
}
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