/* Return time used so far, in microseconds. Copyright (C) 1994, 1999 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 "config.h" #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> #if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H) #include <sys/time.h> #include <sys/resource.h> #endif #ifdef HAVE_TIMES #ifdef HAVE_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 #if defined (HAVE_TIMES) && ! defined (HZ) #define HZ CLOCKS_PER_SEC #endif long get_run_time () { #if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H) 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 */ }