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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 */
- }
-