| /* ANSI-compatible clock function. | |
| Copyright (C) 1994-2025 Free Software Foundation, Inc. | |
| This file is part of the libiberty library. This library is free | |
| software; you can redistribute it and/or modify it under the | |
| terms of the GNU General Public License as published by the | |
| Free Software Foundation; either version 2, or (at your option) | |
| any later version. | |
| This library 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 General Public License for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with GNU CC; see the file COPYING. If not, write to | |
| the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. | |
| As a special exception, if you link this library with files | |
| compiled with a GNU compiler to produce an executable, this does not cause | |
| the resulting executable to be covered by the GNU General Public License. | |
| This exception does not however invalidate any other reasons why | |
| the executable file might be covered by the GNU General Public License. */ | |
| /* | |
| @deftypefn Supplemental long clock (void) | |
| Returns an approximation of the CPU time used by the process as a | |
| @code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the | |
| number of seconds used. | |
| @end deftypefn | |
| */ | |
| /* FIXME: should be able to declare as clock_t. */ | |
| long | |
| clock (void) | |
| { | |
| 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); | |
| struct tms tms; | |
| times (&tms); | |
| return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ); | |
| struct | |
| { | |
| int proc_user_time; | |
| int proc_system_time; | |
| int child_user_time; | |
| int child_system_time; | |
| } vms_times; | |
| times (&vms_times); | |
| return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000; | |
| /* A fallback, if nothing else available. */ | |
| return 0; | |
| } | |