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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/* Copyright (C) 1991-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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 2.1 of the License, or (at your option) any later version.
The GNU C Library 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <time.h>
#include <mach.h>
#include <assert.h>
#include <shlib-compat.h>
#include <mach/mig_errors.h>
/* Get the current time of day, putting it into *TS.
Returns 0 on success, -1 on errors. */
int
__clock_gettime (clockid_t clock_id, struct timespec *ts)
{
mach_msg_type_number_t count;
error_t err;
switch (clock_id) {
case CLOCK_MONOTONIC:
/* If HAVE_HOST_GET_UPTIME64 is not defined or not available,
CLOCK_MONOTONIC will be equivalent to CLOCK_REALTIME. */
#ifdef HAVE_HOST_GET_UPTIME64
{
time_value64_t tv;
err = __host_get_uptime64 (__mach_host_self (), &tv);
if (err != MIG_BAD_ID)
{
if (err)
{
__set_errno (err);
return -1;
}
TIME_VALUE64_TO_TIMESPEC (&tv, ts);
return 0;
}
}
#endif
/* FALLTHROUGH */
case CLOCK_REALTIME:
{
#ifdef HAVE_HOST_GET_TIME64
time_value64_t tv_64;
err = __host_get_time64 (__mach_host_self (), &tv_64);
/* If err is MIG_BAD_ID, it means an old gnumach which does not
support __host_get_time64 is running against the new gnumach
headers which has the signature of __host_get_time64. In that
case, we fall back to __host_get_time. */
if (err != MIG_BAD_ID)
{
if (err)
{
__set_errno (err);
return -1;
}
TIME_VALUE64_TO_TIMESPEC (&tv_64, ts);
return 0;
}
#endif
/* __host_get_time can only fail if passed an invalid host_t.
__mach_host_self could theoretically fail (producing an
invalid host_t) due to resource exhaustion, but we assume
this will never happen. */
time_value_t tv;
__host_get_time (__mach_host_self (), &tv);
TIME_VALUE_TO_TIMESPEC (&tv, ts);
return 0;
}
case CLOCK_PROCESS_CPUTIME_ID:
{
struct time_value t = { .seconds = 0, .microseconds = 0 };
struct task_basic_info bi;
struct task_thread_times_info tti;
/* Dead threads CPU time. */
count = TASK_BASIC_INFO_COUNT;
err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
(task_info_t) &bi, &count);
if (err)
{
__set_errno(err);
return -1;
}
time_value_add (&t, &bi.user_time);
time_value_add (&t, &bi.system_time);
/* Live threads CPU time. */
count = TASK_THREAD_TIMES_INFO_COUNT;
err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
(task_info_t) &tti, &count);
if (err)
{
__set_errno(err);
return -1;
}
time_value_add (&t, &tti.user_time);
time_value_add (&t, &tti.system_time);
TIME_VALUE_TO_TIMESPEC(&t, ts);
return 0;
}
case CLOCK_THREAD_CPUTIME_ID:
{
struct thread_basic_info bi;
mach_port_t self = __mach_thread_self ();
count = THREAD_BASIC_INFO_COUNT;
err = __thread_info (self, THREAD_BASIC_INFO,
(thread_info_t) &bi, &count);
__mach_port_deallocate (__mach_task_self (), self);
if (err)
{
__set_errno(err);
return -1;
}
time_value_add (&bi.user_time, &bi.system_time);
TIME_VALUE_TO_TIMESPEC(&bi.user_time, ts);
return 0;
}
}
errno = EINVAL;
return -1;
}
libc_hidden_def (__clock_gettime)
versioned_symbol (libc, __clock_gettime, clock_gettime, GLIBC_2_17);
/* clock_gettime moved to libc in version 2.17;
old binaries may expect the symbol version it had in librt. */
#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
strong_alias (__clock_gettime, __clock_gettime_2);
compat_symbol (libc, __clock_gettime_2, clock_gettime, GLIBC_2_2);
#endif
#if __TIMESIZE != 64
int
__clock_gettime64 (clockid_t clock_id, struct __timespec64 *ts64)
{
struct timespec ts;
int ret;
ret = __clock_gettime (clock_id, &ts);
if (ret == 0)
*ts64 = valid_timespec_to_timespec64 (ts);
return ret;
}
libc_hidden_def (__clock_gettime64)
#endif
|
