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103 lines
2.6 KiB
103 lines
2.6 KiB
/* ANSI-compatible clock function. |
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Copyright (C) 1994, 1995, 1999 Free Software Foundation, Inc. |
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This file is part of the libiberty library. This library is free |
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software; you can redistribute it and/or modify it under the |
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terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 2, or (at your option) |
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any later version. |
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with GNU CC; see the file COPYING. If not, write to |
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the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
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As a special exception, if you link this library with files |
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compiled with a GNU compiler to produce an executable, this does not cause |
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the resulting executable to be covered by the GNU General Public License. |
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This exception does not however invalidate any other reasons why |
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the executable file might be covered by the GNU General Public License. */ |
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/* |
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@deftypefn Supplemental long clock (void) |
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Returns an approximation of the CPU time used by the process as a |
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@code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the |
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number of seconds used. |
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@end deftypefn |
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*/ |
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#include "config.h" |
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#ifdef HAVE_GETRUSAGE |
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#include <sys/time.h> |
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#include <sys/resource.h> |
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#endif |
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#ifdef HAVE_TIMES |
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#ifdef HAVE_SYS_PARAM_H |
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#include <sys/param.h> |
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#endif |
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#include <sys/times.h> |
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#endif |
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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif |
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#ifdef _SC_CLK_TCK |
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#define GNU_HZ sysconf(_SC_CLK_TCK) |
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#else |
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#ifdef HZ |
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#define GNU_HZ HZ |
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#else |
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#ifdef CLOCKS_PER_SEC |
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#define GNU_HZ CLOCKS_PER_SEC |
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#endif |
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#endif |
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#endif |
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/* FIXME: should be able to declare as clock_t. */ |
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long |
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clock (void) |
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{ |
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#ifdef HAVE_GETRUSAGE |
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struct rusage rusage; |
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getrusage (0, &rusage); |
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return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec |
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+ rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec); |
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#else |
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#ifdef HAVE_TIMES |
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struct tms tms; |
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times (&tms); |
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return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ); |
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#else |
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#ifdef VMS |
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struct |
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{ |
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int proc_user_time; |
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int proc_system_time; |
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int child_user_time; |
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int child_system_time; |
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} vms_times; |
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times (&vms_times); |
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return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000; |
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#else |
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/* A fallback, if nothing else available. */ |
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return 0; |
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#endif /* VMS */ |
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#endif /* HAVE_TIMES */ |
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#endif /* HAVE_GETRUSAGE */ |
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} |
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