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6599da04 | 1 | /* Return time used so far, in microseconds. |
deae2ed9 | 2 | Copyright (C) 1994, 1999, 2002 Free Software Foundation, Inc. |
6599da04 JM |
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 | |
ee58dffd NC |
17 | not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
18 | Boston, MA 02110-1301, USA. */ | |
6599da04 | 19 | |
3affd5f0 JL |
20 | #include "config.h" |
21 | ||
6599da04 JM |
22 | #include "ansidecl.h" |
23 | #include "libiberty.h" | |
24 | ||
deae2ed9 MM |
25 | /* On some systems (such as WindISS), you must include <sys/types.h> |
26 | to get the definition of "time_t" before you include <time.h>. */ | |
27 | #include <sys/types.h> | |
28 | ||
6599da04 JM |
29 | /* There are several ways to get elapsed execution time; unfortunately no |
30 | single way is available for all host systems, nor are there reliable | |
31 | ways to find out which way is correct for a given host. */ | |
32 | ||
c6451ce1 MS |
33 | #ifdef TIME_WITH_SYS_TIME |
34 | # include <sys/time.h> | |
35 | # include <time.h> | |
36 | #else | |
37 | # if HAVE_SYS_TIME_H | |
38 | # include <sys/time.h> | |
39 | # else | |
40 | # ifdef HAVE_TIME_H | |
41 | # include <time.h> | |
42 | # endif | |
43 | # endif | |
44 | #endif | |
6599da04 | 45 | |
6a071f4a | 46 | #if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H) |
6599da04 JM |
47 | #include <sys/resource.h> |
48 | #endif | |
49 | ||
50 | #ifdef HAVE_TIMES | |
3affd5f0 | 51 | #ifdef HAVE_SYS_PARAM_H |
6599da04 JM |
52 | #include <sys/param.h> |
53 | #endif | |
54 | #include <sys/times.h> | |
55 | #endif | |
56 | ||
2c45d1a0 RH |
57 | #ifdef HAVE_UNISTD_H |
58 | #include <unistd.h> | |
59 | #endif | |
60 | ||
6599da04 JM |
61 | /* This is a fallback; if wrong, it will likely make obviously wrong |
62 | results. */ | |
63 | ||
64 | #ifndef CLOCKS_PER_SEC | |
65 | #define CLOCKS_PER_SEC 1 | |
66 | #endif | |
67 | ||
2c45d1a0 RH |
68 | #ifdef _SC_CLK_TCK |
69 | #define GNU_HZ sysconf(_SC_CLK_TCK) | |
70 | #else | |
71 | #ifdef HZ | |
72 | #define GNU_HZ HZ | |
73 | #else | |
74 | #ifdef CLOCKS_PER_SEC | |
75 | #define GNU_HZ CLOCKS_PER_SEC | |
76 | #endif | |
77 | #endif | |
b207e09c MK |
78 | #endif |
79 | ||
aac04c15 DD |
80 | /* |
81 | ||
5bed56d9 | 82 | @deftypefn Replacement long get_run_time (void) |
aac04c15 DD |
83 | |
84 | Returns the time used so far, in microseconds. If possible, this is | |
85 | the time used by this process, else it is the elapsed time since the | |
86 | process started. | |
87 | ||
88 | @end deftypefn | |
89 | ||
90 | */ | |
91 | ||
6599da04 | 92 | long |
6da879de | 93 | get_run_time (void) |
6599da04 | 94 | { |
6a071f4a | 95 | #if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H) |
6599da04 JM |
96 | struct rusage rusage; |
97 | ||
62ee3145 UB |
98 | #if defined __USE_GNU && !defined __cplusplus |
99 | getrusage (RUSAGE_SELF, &rusage); | |
100 | #else | |
6599da04 | 101 | getrusage (0, &rusage); |
62ee3145 | 102 | #endif |
6599da04 JM |
103 | return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec |
104 | + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec); | |
105 | #else /* ! HAVE_GETRUSAGE */ | |
106 | #ifdef HAVE_TIMES | |
107 | struct tms tms; | |
108 | ||
109 | times (&tms); | |
2c45d1a0 | 110 | return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ); |
6599da04 JM |
111 | #else /* ! HAVE_TIMES */ |
112 | /* Fall back on clock and hope it's correctly implemented. */ | |
113 | const long clocks_per_sec = CLOCKS_PER_SEC; | |
114 | if (clocks_per_sec <= 1000000) | |
115 | return clock () * (1000000 / clocks_per_sec); | |
116 | else | |
117 | return clock () / clocks_per_sec; | |
118 | #endif /* HAVE_TIMES */ | |
119 | #endif /* HAVE_GETRUSAGE */ | |
120 | } |