0,0 → 1,116 |
/* Return time used so far, in microseconds. |
Copyright (C) 1994, 1999, 2002 Free Software Foundation, Inc. |
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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., 51 Franklin Street - Fifth Floor, |
Boston, MA 02110-1301, USA. */ |
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#include "config.h" |
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#include "ansidecl.h" |
#include "libiberty.h" |
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/* 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> |
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/* 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. */ |
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#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 |
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#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H) |
#include <sys/resource.h> |
#endif |
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#ifdef HAVE_TIMES |
#ifdef HAVE_SYS_PARAM_H |
#include <sys/param.h> |
#endif |
#include <sys/times.h> |
#endif |
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#ifdef HAVE_UNISTD_H |
#include <unistd.h> |
#endif |
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/* This is a fallback; if wrong, it will likely make obviously wrong |
results. */ |
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#ifndef CLOCKS_PER_SEC |
#define CLOCKS_PER_SEC 1 |
#endif |
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#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 |
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/* |
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@deftypefn Replacement long get_run_time (void) |
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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. |
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@end deftypefn |
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*/ |
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long |
get_run_time (void) |
{ |
#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H) |
struct rusage rusage; |
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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; |
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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 */ |
} |