1 /* time -- Get number of seconds since Epoch. Linux version.
2 Copyright (C) 2020-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
19 /* Optimize the function call by setting the PLT directly to vDSO symbol. */
23 # include <sysdep-vdso.h>
27 # include <libc-vdso.h>
30 time_syscall (time_t *t
)
32 return INLINE_SYSCALL_CALL (time
, t
);
36 # define INIT_ARCH() \
37 void *vdso_time = dl_vdso_vsym (HAVE_TIME_VSYSCALL);
39 vdso_time
? VDSO_IFUNC_RET (vdso_time
)
40 : (void *) time_syscall
);
46 return INLINE_VSYSCALL (time
, 1, t
);
49 #else /* USE_IFUNC_TIME */
51 # include <time-clockid.h>
54 /* Return the time now, and store it in *TIMER if not NULL. */
57 __time64 (__time64_t
*timer
)
59 struct __timespec64 ts
;
60 __clock_gettime64 (TIME_CLOCK_GETTIME_CLOCKID
, &ts
);
68 libc_hidden_def (__time64
)
71 __time (time_t *timer
)
73 __time64_t t
= __time64 (NULL
);
75 if (! in_time_t_range (t
))
77 __set_errno (EOVERFLOW
);
86 weak_alias (__time
, time
)