diff options
author | kan <kan@FreeBSD.org> | 2003-07-11 03:40:53 +0000 |
---|---|---|
committer | kan <kan@FreeBSD.org> | 2003-07-11 03:40:53 +0000 |
commit | b2a8872fbe1ec1c49094559ac7b78e6ea4ab7180 (patch) | |
tree | f6b0610f4a17fd26aa234354f050080f789861a4 /contrib/gcc/getruntime.c | |
parent | 52e69d78eee5612ac195e0701a5cebe40d1ab0e1 (diff) | |
download | FreeBSD-src-b2a8872fbe1ec1c49094559ac7b78e6ea4ab7180.zip FreeBSD-src-b2a8872fbe1ec1c49094559ac7b78e6ea4ab7180.tar.gz |
Gcc 3.3.1-pre as of 2003-07-11.
Diffstat (limited to 'contrib/gcc/getruntime.c')
-rw-r--r-- | contrib/gcc/getruntime.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/contrib/gcc/getruntime.c b/contrib/gcc/getruntime.c new file mode 100644 index 0000000..3f7dc0d --- /dev/null +++ b/contrib/gcc/getruntime.c @@ -0,0 +1,116 @@ +/* Return time used so far, in microseconds. + Copyright (C) 1994, 1999, 2002 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" + +/* On some systems (such as WindISS), you must include <sys/types.h> + to get the definition of "time_t" before you include <time.h>. */ +#include <sys/types.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. */ + +#ifdef TIME_WITH_SYS_TIME +# include <sys/time.h> +# include <time.h> +#else +# if HAVE_SYS_TIME_H +# include <sys/time.h> +# else +# ifdef HAVE_TIME_H +# include <time.h> +# endif +# endif +#endif + +#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H) +#include <sys/resource.h> +#endif + +#ifdef HAVE_TIMES +#ifdef HAVE_SYS_PARAM_H +#include <sys/param.h> +#endif +#include <sys/times.h> +#endif + +#ifdef HAVE_UNISTD_H +#include <unistd.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 + +#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 + +/* + +@deftypefn Replacement long get_run_time (void) + +Returns the time used so far, in microseconds. If possible, this is +the time used by this process, else it is the elapsed time since the +process started. + +@end deftypefn + +*/ + +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 / GNU_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 */ +} |