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/* Copyright (C) 2003-2020 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/>. */
#include <time.h>
#include <kernel-features.h>
#include <errno.h>
#include <sysdep-cancel.h>
#include "kernel-posix-cpu-timers.h"
#include <shlib-compat.h>
/* We can simply use the syscall. The CPU clocks are not supported
with this function. */
int
__clock_nanosleep_time64 (clockid_t clock_id, int flags, const struct __timespec64 *req,
struct __timespec64 *rem)
{
int r;
if (clock_id == CLOCK_THREAD_CPUTIME_ID)
return EINVAL;
if (clock_id == CLOCK_PROCESS_CPUTIME_ID)
clock_id = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED);
/* If the call is interrupted by a signal handler or encounters an error,
it returns a positive value similar to errno. */
#ifdef __ASSUME_TIME64_SYSCALLS
# ifndef __NR_clock_nanosleep_time64
# define __NR_clock_nanosleep_time64 __NR_clock_nanosleep
# endif
r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, clock_id,
flags, req, rem);
#else
# ifdef __NR_clock_nanosleep_time64
r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, clock_id,
flags, req, rem);
if (! INTERNAL_SYSCALL_ERROR_P (r))
return 0;
if (INTERNAL_SYSCALL_ERRNO (r) != ENOSYS)
return INTERNAL_SYSCALL_ERRNO (r);
# endif /* __NR_clock_nanosleep_time64 */
if (! in_time_t_range (req->tv_sec))
{
__set_errno (EOVERFLOW);
return -1;
}
struct timespec tr32;
struct timespec ts32 = valid_timespec64_to_timespec (*req);
r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep, clock_id, flags,
&ts32, &tr32);
if (INTERNAL_SYSCALL_ERROR_P (r))
{
if (INTERNAL_SYSCALL_ERRNO (r) == EINTR && rem != NULL
&& (flags & TIMER_ABSTIME) == 0)
*rem = valid_timespec_to_timespec64 (tr32);
}
#endif /* __ASSUME_TIME64_SYSCALLS */
return (INTERNAL_SYSCALL_ERROR_P (r)
? INTERNAL_SYSCALL_ERRNO (r) : 0);
}
#if __TIMESIZE != 64
int
__clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
struct timespec *rem)
{
int r;
struct __timespec64 treq64, trem64;
treq64 = valid_timespec_to_timespec64 (*req);
r = __clock_nanosleep_time64 (clock_id, flags, &treq64, &trem64);
if (r == EINTR && rem != NULL && (flags & TIMER_ABSTIME) == 0)
*rem = valid_timespec64_to_timespec (trem64);
return r;
}
#endif
libc_hidden_def (__clock_nanosleep)
versioned_symbol (libc, __clock_nanosleep, clock_nanosleep, GLIBC_2_17);
/* clock_nanosleep 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_nanosleep, __clock_nanosleep_2);
compat_symbol (libc, __clock_nanosleep_2, clock_nanosleep, GLIBC_2_2);
#endif
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