Mercurial > hg > CbC > CbC_gcc
comparison libiberty/clock.c @ 0:a06113de4d67
first commit
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
---|---|
date | Fri, 17 Jul 2009 14:47:48 +0900 |
parents | |
children | 04ced10e8804 |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:a06113de4d67 |
---|---|
1 /* ANSI-compatible clock function. | |
2 Copyright (C) 1994, 1995, 1999 Free Software Foundation, Inc. | |
3 | |
4 This file is part of the libiberty library. This library is free | |
5 software; you can redistribute it and/or modify it under the | |
6 terms of the GNU General Public License as published by the | |
7 Free Software Foundation; either version 2, or (at your option) | |
8 any later version. | |
9 | |
10 This library 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 | |
13 GNU General Public License for more details. | |
14 | |
15 You should have received a copy of the GNU General Public License | |
16 along with GNU CC; see the file COPYING. If not, write to | |
17 the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. | |
18 | |
19 As a special exception, if you link this library with files | |
20 compiled with a GNU compiler to produce an executable, this does not cause | |
21 the resulting executable to be covered by the GNU General Public License. | |
22 This exception does not however invalidate any other reasons why | |
23 the executable file might be covered by the GNU General Public License. */ | |
24 | |
25 /* | |
26 | |
27 @deftypefn Supplemental long clock (void) | |
28 | |
29 Returns an approximation of the CPU time used by the process as a | |
30 @code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the | |
31 number of seconds used. | |
32 | |
33 @end deftypefn | |
34 | |
35 */ | |
36 | |
37 #include "config.h" | |
38 | |
39 #ifdef HAVE_GETRUSAGE | |
40 #include <sys/time.h> | |
41 #include <sys/resource.h> | |
42 #endif | |
43 | |
44 #ifdef HAVE_TIMES | |
45 #ifdef HAVE_SYS_PARAM_H | |
46 #include <sys/param.h> | |
47 #endif | |
48 #include <sys/times.h> | |
49 #endif | |
50 | |
51 #ifdef HAVE_UNISTD_H | |
52 #include <unistd.h> | |
53 #endif | |
54 | |
55 #ifdef _SC_CLK_TCK | |
56 #define GNU_HZ sysconf(_SC_CLK_TCK) | |
57 #else | |
58 #ifdef HZ | |
59 #define GNU_HZ HZ | |
60 #else | |
61 #ifdef CLOCKS_PER_SEC | |
62 #define GNU_HZ CLOCKS_PER_SEC | |
63 #endif | |
64 #endif | |
65 #endif | |
66 | |
67 /* FIXME: should be able to declare as clock_t. */ | |
68 | |
69 long | |
70 clock (void) | |
71 { | |
72 #ifdef HAVE_GETRUSAGE | |
73 struct rusage rusage; | |
74 | |
75 getrusage (0, &rusage); | |
76 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec | |
77 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec); | |
78 #else | |
79 #ifdef HAVE_TIMES | |
80 struct tms tms; | |
81 | |
82 times (&tms); | |
83 return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ); | |
84 #else | |
85 #ifdef VMS | |
86 struct | |
87 { | |
88 int proc_user_time; | |
89 int proc_system_time; | |
90 int child_user_time; | |
91 int child_system_time; | |
92 } vms_times; | |
93 | |
94 times (&vms_times); | |
95 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000; | |
96 #else | |
97 /* A fallback, if nothing else available. */ | |
98 return 0; | |
99 #endif /* VMS */ | |
100 #endif /* HAVE_TIMES */ | |
101 #endif /* HAVE_GETRUSAGE */ | |
102 } | |
103 |