mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/* clock_gettime -- Get current time from a POSIX clockid_t. Linux version.
|
|
Copyright (C) 2003-2022 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 <sysdep.h>
|
|
#include <kernel-features.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include "kernel-posix-cpu-timers.h"
|
|
#include <sysdep-vdso.h>
|
|
#include <shlib-compat.h>
|
|
|
|
/* Get current value of CLOCK and store it in TP. */
|
|
int
|
|
__clock_gettime64 (clockid_t clock_id, struct __timespec64 *tp)
|
|
{
|
|
int r;
|
|
|
|
#ifndef __NR_clock_gettime64
|
|
# define __NR_clock_gettime64 __NR_clock_gettime
|
|
#endif
|
|
|
|
#ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
|
|
int (*vdso_time64) (clockid_t clock_id, struct __timespec64 *tp)
|
|
= GLRO(dl_vdso_clock_gettime64);
|
|
if (vdso_time64 != NULL)
|
|
{
|
|
r = INTERNAL_VSYSCALL_CALL (vdso_time64, 2, clock_id, tp);
|
|
if (r == 0)
|
|
return 0;
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (-r);
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
|
|
int (*vdso_time) (clockid_t clock_id, struct timespec *tp)
|
|
= GLRO(dl_vdso_clock_gettime);
|
|
if (vdso_time != NULL)
|
|
{
|
|
struct timespec tp32;
|
|
r = INTERNAL_VSYSCALL_CALL (vdso_time, 2, clock_id, &tp32);
|
|
if (r == 0 && tp32.tv_sec >= 0)
|
|
{
|
|
*tp = valid_timespec_to_timespec64 (tp32);
|
|
return 0;
|
|
}
|
|
else if (r != 0)
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (-r);
|
|
|
|
/* Fallback to syscall if the 32-bit time_t vDSO returns overflows. */
|
|
}
|
|
#endif
|
|
|
|
r = INTERNAL_SYSCALL_CALL (clock_gettime64, clock_id, tp);
|
|
if (r == 0)
|
|
return 0;
|
|
if (r != -ENOSYS)
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (-r);
|
|
|
|
#ifndef __ASSUME_TIME64_SYSCALLS
|
|
/* Fallback code that uses 32-bit support. */
|
|
struct timespec tp32;
|
|
r = INTERNAL_SYSCALL_CALL (clock_gettime, clock_id, &tp32);
|
|
if (r == 0)
|
|
{
|
|
*tp = valid_timespec_to_timespec64 (tp32);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (-r);
|
|
}
|
|
|
|
#if __TIMESIZE != 64
|
|
libc_hidden_def (__clock_gettime64)
|
|
|
|
int
|
|
__clock_gettime (clockid_t clock_id, struct timespec *tp)
|
|
{
|
|
int ret;
|
|
struct __timespec64 tp64;
|
|
|
|
ret = __clock_gettime64 (clock_id, &tp64);
|
|
|
|
if (ret == 0)
|
|
{
|
|
if (! in_time_t_range (tp64.tv_sec))
|
|
{
|
|
__set_errno (EOVERFLOW);
|
|
return -1;
|
|
}
|
|
|
|
*tp = valid_timespec64_to_timespec (tp64);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
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
|