/* ANSI-compatible clock function.
- Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+ Copyright (C) 1994, 1995, 1999 Free Software Foundation, Inc.
This file is part of the libiberty library. This library is free
software; you can redistribute it and/or modify it under the
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
As a special exception, if you link this library with files
compiled with a GNU compiler to produce an executable, this does not cause
This exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public License. */
+/*
+
+@deftypefn Supplemental long clock (void)
+
+Returns an approximation of the CPU time used by the process as a
+@code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the
+number of seconds used.
+
+@end deftypefn
+
+*/
+
+#include "config.h"
+
#ifdef HAVE_GETRUSAGE
#include <sys/time.h>
#include <sys/resource.h>
#endif
#ifdef HAVE_TIMES
-#ifndef NO_SYS_PARAM_H
+#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <sys/times.h>
#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef _SC_CLK_TCK
+#define GNU_HZ sysconf(_SC_CLK_TCK)
+#else
+#ifdef HZ
+#define GNU_HZ HZ
+#else
+#ifdef CLOCKS_PER_SEC
+#define GNU_HZ CLOCKS_PER_SEC
+#endif
+#endif
+#endif
+
/* FIXME: should be able to declare as clock_t. */
long
-clock ()
+clock (void)
{
#ifdef HAVE_GETRUSAGE
struct rusage rusage;
struct tms tms;
times (&tms);
- return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
+ return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ);
#else
#ifdef VMS
struct