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/* Copyright (C) 2018-2020 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/>. */
/* Get the current time of day and timezone information,
putting it into *tv and *tz. If tz is null, *tz is not filled.
Returns 0 on success, -1 on errors. */
#include <time.h>
#include <sysdep.h>
#ifdef HAVE_GETTIMEOFDAY_VSYSCALL
# define HAVE_VSYSCALL
#endif
#include <sysdep-vdso.h>
/* Used as a fallback in the ifunc resolver if VDSO is not available
and for libc.so internal __gettimeofday calls. */
static int
__gettimeofday_vsyscall (struct timeval *restrict tv, void *restrict tz)
{
if (__glibc_unlikely (tz != 0))
memset (tz, 0, sizeof *tz);
return INLINE_VSYSCALL (gettimeofday, 2, tv, tz);
}
#ifdef SHARED
# include <dl-vdso.h>
# include <sysdep-vdso.h>
# define INIT_ARCH()
libc_ifunc (__gettimeofday,
(get_vdso_symbol (HAVE_GETTIMEOFDAY_VSYSCALL)
?: __gettimeofday_vsyscall))
#else
int
__gettimeofday (struct timeval *restrict tv, void *restrict tz)
{
return __gettimeofday_vsyscall (tv, tz);
}
#endif
weak_alias (__gettimeofday, gettimeofday)
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