projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 6599da04 JM |
1 | /* Return time used so far, in microseconds. |
| 2 | Copyright (C) 1994 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of the libiberty library. | |
| 5 | Libiberty is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Library General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | Libiberty is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Library General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Library General Public | |
| 16 | License along with libiberty; see the file COPYING.LIB. If | |
| 17 | not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 18 | Boston, MA 02111-1307, USA. */ | |
| 19 | ||
| 3affd5f0 JL |
20 | #include "config.h" |
| 21 | ||
| 6599da04 JM |
22 | #include "ansidecl.h" |
| 23 | #include "libiberty.h" | |
| 24 | ||
| 25 | /* There are several ways to get elapsed execution time; unfortunately no | |
| 26 | single way is available for all host systems, nor are there reliable | |
| 27 | ways to find out which way is correct for a given host. */ | |
| 28 | ||
| 29 | #include <time.h> | |
| 30 | ||
| 6599da04 JM |
31 | #ifdef HAVE_GETRUSAGE |
| 32 | #include <sys/time.h> | |
| 33 | #include <sys/resource.h> | |
| 34 | #endif | |
| 35 | ||
| 36 | #ifdef HAVE_TIMES | |
| 3affd5f0 | 37 | #ifdef HAVE_SYS_PARAM_H |
| 6599da04 JM |
38 | #include <sys/param.h> |
| 39 | #endif | |
| 40 | #include <sys/times.h> | |
| 41 | #endif | |
| 42 | ||
| 43 | /* This is a fallback; if wrong, it will likely make obviously wrong | |
| 44 | results. */ | |
| 45 | ||
| 46 | #ifndef CLOCKS_PER_SEC | |
| 47 | #define CLOCKS_PER_SEC 1 | |
| 48 | #endif | |
| 49 | ||
| 50 | long | |
| 51 | get_run_time () | |
| 52 | { | |
| 53 | #ifdef HAVE_GETRUSAGE | |
| 54 | struct rusage rusage; | |
| 55 | ||
| 56 | getrusage (0, &rusage); | |
| 57 | return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec | |
| 58 | + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec); | |
| 59 | #else /* ! HAVE_GETRUSAGE */ | |
| 60 | #ifdef HAVE_TIMES | |
| 61 | struct tms tms; | |
| 62 | ||
| 63 | times (&tms); | |
| 64 | return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ); | |
| 65 | #else /* ! HAVE_TIMES */ | |
| 66 | /* Fall back on clock and hope it's correctly implemented. */ | |
| 67 | const long clocks_per_sec = CLOCKS_PER_SEC; | |
| 68 | if (clocks_per_sec <= 1000000) | |
| 69 | return clock () * (1000000 / clocks_per_sec); | |
| 70 | else | |
| 71 | return clock () / clocks_per_sec; | |
| 72 | #endif /* HAVE_TIMES */ | |
| 73 | #endif /* HAVE_GETRUSAGE */ | |
| 74 | } |