| /* ANSI-compatible clock function. |
| Copyright (C) 1994-2024 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 |
| |
| */ |
| |
| #include "config.h" |
| |
| #ifdef HAVE_GETRUSAGE |
| #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 |
| |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #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 |
| |
| /* FIXME: should be able to declare as clock_t. */ |
| |
| long |
| clock (void) |
| { |
| #ifdef HAVE_GETRUSAGE |
| 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 |
| #ifdef HAVE_TIMES |
| struct tms tms; |
| |
| times (&tms); |
| return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ); |
| #else |
| #ifdef VMS |
| 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; |
| #else |
| /* A fallback, if nothing else available. */ |
| return 0; |
| #endif /* VMS */ |
| #endif /* HAVE_TIMES */ |
| #endif /* HAVE_GETRUSAGE */ |
| } |
| |