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e760874e | 1 | /* time -- Get number of seconds since Epoch. Linux version. |
dff8da6b | 2 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
e760874e AZ |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C 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 GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | /* Optimize the function call by setting the PLT directly to vDSO symbol. */ | |
20 | #ifdef USE_IFUNC_TIME | |
21 | # include <time.h> | |
22 | # include <sysdep.h> | |
23 | # include <sysdep-vdso.h> | |
24 | ||
25 | #ifdef SHARED | |
26 | # include <dl-vdso.h> | |
1bdda52f | 27 | # include <libc-vdso.h> |
e760874e AZ |
28 | |
29 | static time_t | |
30 | time_syscall (time_t *t) | |
31 | { | |
32 | return INLINE_SYSCALL_CALL (time, t); | |
33 | } | |
34 | ||
35 | # undef INIT_ARCH | |
55d33108 | 36 | # define INIT_ARCH() |
e760874e | 37 | libc_ifunc (time, |
55d33108 AZ |
38 | GLRO(dl_vdso_time) != NULL ? VDSO_IFUNC_RET (GLRO(dl_vdso_time)) |
39 | : (void *) time_syscall); | |
e760874e AZ |
40 | |
41 | # else | |
42 | time_t | |
43 | time (time_t *t) | |
44 | { | |
45 | return INLINE_VSYSCALL (time, 1, t); | |
46 | } | |
47 | # endif /* !SHARED */ | |
48 | #else /* USE_IFUNC_TIME */ | |
75c4044b LM |
49 | # include <time.h> |
50 | # include <time-clockid.h> | |
51 | # include <errno.h> | |
52 | ||
53 | /* Return the time now, and store it in *TIMER if not NULL. */ | |
54 | ||
55 | __time64_t | |
56 | __time64 (__time64_t *timer) | |
57 | { | |
58 | struct __timespec64 ts; | |
59 | __clock_gettime64 (TIME_CLOCK_GETTIME_CLOCKID, &ts); | |
60 | ||
61 | if (timer != NULL) | |
62 | *timer = ts.tv_sec; | |
63 | return ts.tv_sec; | |
64 | } | |
65 | ||
66 | # if __TIMESIZE != 64 | |
67 | libc_hidden_def (__time64) | |
68 | ||
69 | time_t | |
70 | __time (time_t *timer) | |
71 | { | |
72 | __time64_t t = __time64 (NULL); | |
73 | ||
74 | if (! in_time_t_range (t)) | |
75 | { | |
76 | __set_errno (EOVERFLOW); | |
77 | return -1; | |
78 | } | |
79 | ||
80 | if (timer != NULL) | |
81 | *timer = t; | |
82 | return t; | |
83 | } | |
84 | # endif | |
85 | weak_alias (__time, time) | |
e760874e | 86 | #endif |