| 1 | /* ANSI-compatible clock function.
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| 2 | Copyright (C) 1994, 1995, 1999 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is part of the libiberty library. This library is free
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| 5 | software; you can redistribute it and/or modify it under the
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| 6 | terms of the GNU General Public License as published by the
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| 7 | Free Software Foundation; either version 2, or (at your option)
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| 8 | any later version.
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| 9 |
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| 10 | This library is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with GNU CC; see the file COPYING. If not, write to
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| 17 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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| 18 |
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| 19 | As a special exception, if you link this library with files
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| 20 | compiled with a GNU compiler to produce an executable, this does not cause
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| 21 | the resulting executable to be covered by the GNU General Public License.
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| 22 | This exception does not however invalidate any other reasons why
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| 23 | the executable file might be covered by the GNU General Public License. */
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| 24 |
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| 25 | /*
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| 26 |
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| 27 | @deftypefn Supplemental long clock (void)
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| 28 |
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| 29 | Returns an approximation of the CPU time used by the process as a
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| 30 | @code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the
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| 31 | number of seconds used.
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| 32 |
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| 33 | @end deftypefn
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| 34 |
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| 35 | */
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| 36 |
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| 37 | #include "config.h"
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| 38 |
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| 39 | #ifdef HAVE_GETRUSAGE
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| 40 | #include <sys/time.h>
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| 41 | #include <sys/resource.h>
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| 42 | #endif
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| 43 |
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| 44 | #ifdef HAVE_TIMES
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| 45 | #ifdef HAVE_SYS_PARAM_H
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| 46 | #include <sys/param.h>
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| 47 | #endif
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| 48 | #include <sys/times.h>
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| 49 | #endif
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| 50 |
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| 51 | #ifdef HAVE_UNISTD_H
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| 52 | #include <unistd.h>
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| 53 | #endif
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| 54 |
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| 55 | #ifdef _SC_CLK_TCK
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| 56 | #define GNU_HZ sysconf(_SC_CLK_TCK)
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| 57 | #else
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| 58 | #ifdef HZ
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| 59 | #define GNU_HZ HZ
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| 60 | #else
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| 61 | #ifdef CLOCKS_PER_SEC
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| 62 | #define GNU_HZ CLOCKS_PER_SEC
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| 63 | #endif
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| 64 | #endif
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| 65 | #endif
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| 66 |
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| 67 | /* FIXME: should be able to declare as clock_t. */
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| 68 |
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| 69 | long
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| 70 | clock ()
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| 71 | {
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| 72 | #ifdef HAVE_GETRUSAGE
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| 73 | struct rusage rusage;
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| 74 |
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| 75 | getrusage (0, &rusage);
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| 76 | return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
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| 77 | + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
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| 78 | #else
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| 79 | #ifdef HAVE_TIMES
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| 80 | struct tms tms;
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| 81 |
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| 82 | times (&tms);
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| 83 | return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ);
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| 84 | #else
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| 85 | #ifdef VMS
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| 86 | struct
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| 87 | {
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| 88 | int proc_user_time;
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| 89 | int proc_system_time;
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| 90 | int child_user_time;
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| 91 | int child_system_time;
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| 92 | } vms_times;
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| 93 |
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| 94 | times (&vms_times);
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| 95 | return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
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| 96 | #else
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| 97 | /* A fallback, if nothing else available. */
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| 98 | return 0;
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| 99 | #endif /* VMS */
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| 100 | #endif /* HAVE_TIMES */
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| 101 | #endif /* HAVE_GETRUSAGE */
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| 102 | }
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| 103 |
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