1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/* getrusage replacement for systems which lack it.
Copyright (C) 2012-2022 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible, 2012. */
#include <config.h>
/* Specification. */
#include <sys/resource.h>
#include <errno.h>
#include <string.h>
/* Get uint64_t. */
#include <stdint.h>
#if defined _WIN32 && ! defined __CYGWIN__
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
#else
# include <sys/times.h>
# include <unistd.h>
#endif
int
getrusage (int who, struct rusage *usage_p)
{
if (who == RUSAGE_SELF || who == RUSAGE_CHILDREN)
{
/* Clear all unsupported members of 'struct rusage'. */
memset (usage_p, '\0', sizeof (struct rusage));
#if defined _WIN32 && ! defined __CYGWIN__
if (who == RUSAGE_SELF)
{
/* Fill in the ru_utime and ru_stime members. */
FILETIME creation_time;
FILETIME exit_time;
FILETIME kernel_time;
FILETIME user_time;
if (GetProcessTimes (GetCurrentProcess (),
&creation_time, &exit_time,
&kernel_time, &user_time))
{
/* Convert to microseconds, rounding. */
uint64_t kernel_usec =
((((uint64_t) kernel_time.dwHighDateTime << 32)
| (uint64_t) kernel_time.dwLowDateTime)
+ 5) / 10;
uint64_t user_usec =
((((uint64_t) user_time.dwHighDateTime << 32)
| (uint64_t) user_time.dwLowDateTime)
+ 5) / 10;
usage_p->ru_utime.tv_sec = user_usec / 1000000U;
usage_p->ru_utime.tv_usec = user_usec % 1000000U;
usage_p->ru_stime.tv_sec = kernel_usec / 1000000U;
usage_p->ru_stime.tv_usec = kernel_usec % 1000000U;
}
}
#else
/* Fill in the ru_utime and ru_stime members. */
{
struct tms time;
if (times (&time) != (clock_t) -1)
{
/* Number of clock ticks per second. */
unsigned int clocks_per_second = sysconf (_SC_CLK_TCK);
if (clocks_per_second > 0)
{
clock_t user_ticks;
clock_t system_ticks;
uint64_t user_usec;
uint64_t system_usec;
if (who == RUSAGE_CHILDREN)
{
user_ticks = time.tms_cutime;
system_ticks = time.tms_cstime;
}
else
{
user_ticks = time.tms_utime;
system_ticks = time.tms_stime;
}
user_usec =
(((uint64_t) user_ticks * (uint64_t) 1000000U)
+ clocks_per_second / 2) / clocks_per_second;
system_usec =
(((uint64_t) system_ticks * (uint64_t) 1000000U)
+ clocks_per_second / 2) / clocks_per_second;
usage_p->ru_utime.tv_sec = user_usec / 1000000U;
usage_p->ru_utime.tv_usec = user_usec % 1000000U;
usage_p->ru_stime.tv_sec = system_usec / 1000000U;
usage_p->ru_stime.tv_usec = system_usec % 1000000U;
}
}
}
#endif
return 0;
}
else
{
errno = EINVAL;
return -1;
}
}
|
