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authorjason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>1997-08-21 22:57:35 +0000
committerjason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>1997-08-21 22:57:35 +0000
commit28e9041cc224267271fbcd8db22bea115912365b (patch)
treea3b19970338bdae580faff126a716e1d5520400c /libiberty/getruntime.c
parent5000a677980ebfb439f5349c5e269f7447dbab41 (diff)
downloadgcc-28e9041cc224267271fbcd8db22bea115912365b.tar.gz
Initial revision
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@14877 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libiberty/getruntime.c')
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diff --git a/libiberty/getruntime.c b/libiberty/getruntime.c
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+/* Return time used so far, in microseconds.
+ Copyright (C) 1994 Free Software Foundation, Inc.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "ansidecl.h"
+#include "libiberty.h"
+
+/* There are several ways to get elapsed execution time; unfortunately no
+ single way is available for all host systems, nor are there reliable
+ ways to find out which way is correct for a given host. */
+
+#include <time.h>
+
+/* These should go away when libiberty uses autoconf. */
+
+#if defined(__sun__) && !defined(__svr4__)
+#define HAVE_GETRUSAGE
+#endif
+
+#ifdef HAVE_SYSCONF
+#define HAVE_TIMES
+#endif
+
+#ifdef HAVE_GETRUSAGE
+#include <sys/time.h>
+#include <sys/resource.h>
+#endif
+
+#ifdef HAVE_TIMES
+#ifndef NO_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#include <sys/times.h>
+#endif
+
+/* This is a fallback; if wrong, it will likely make obviously wrong
+ results. */
+
+#ifndef CLOCKS_PER_SEC
+#define CLOCKS_PER_SEC 1
+#endif
+
+long
+get_run_time ()
+{
+#ifdef HAVE_GETRUSAGE
+ struct rusage rusage;
+
+ getrusage (0, &rusage);
+ return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
+ + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
+#else /* ! HAVE_GETRUSAGE */
+#ifdef HAVE_TIMES
+ struct tms tms;
+
+ times (&tms);
+ return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
+#else /* ! HAVE_TIMES */
+ /* Fall back on clock and hope it's correctly implemented. */
+ const long clocks_per_sec = CLOCKS_PER_SEC;
+ if (clocks_per_sec <= 1000000)
+ return clock () * (1000000 / clocks_per_sec);
+ else
+ return clock () / clocks_per_sec;
+#endif /* HAVE_TIMES */
+#endif /* HAVE_GETRUSAGE */
+}