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A new build flag, _TIME_BITS, enables the usage of the newer 64-bit
time symbols for legacy ABI (where 32-bit time_t is default). The 64
bit time support is only enabled if LFS (_FILE_OFFSET_BITS=64) is
also used.
Different than LFS support, the y2038 symbols are added only for the
required ABIs (armhf, csky, hppa, i386, m68k, microblaze, mips32,
mips64-n32, nios2, powerpc32, sparc32, s390-32, and sh). The ABIs with
64-bit time support are unchanged, both for symbol and types
redirection.
On Linux the full 64-bit time support requires a minimum of kernel
version v5.1. Otherwise, the 32-bit fallbacks are used and might
results in error with overflow return code (EOVERFLOW).
The i686-gnu does not yet support 64-bit time.
This patch exports following rediretions to support 64-bit time:
* libc:
adjtime
adjtimex
clock_adjtime
clock_getres
clock_gettime
clock_nanosleep
clock_settime
cnd_timedwait
ctime
ctime_r
difftime
fstat
fstatat
futimens
futimes
futimesat
getitimer
getrusage
gettimeofday
gmtime
gmtime_r
localtime
localtime_r
lstat_time
lutimes
mktime
msgctl
mtx_timedlock
nanosleep
nanosleep
ntp_gettime
ntp_gettimex
ppoll
pselec
pselect
pthread_clockjoin_np
pthread_cond_clockwait
pthread_cond_timedwait
pthread_mutex_clocklock
pthread_mutex_timedlock
pthread_rwlock_clockrdlock
pthread_rwlock_clockwrlock
pthread_rwlock_timedrdlock
pthread_rwlock_timedwrlock
pthread_timedjoin_np
recvmmsg
sched_rr_get_interval
select
sem_clockwait
semctl
semtimedop
sem_timedwait
setitimer
settimeofday
shmctl
sigtimedwait
stat
thrd_sleep
time
timegm
timerfd_gettime
timerfd_settime
timespec_get
utime
utimensat
utimes
utimes
wait3
wait4
* librt:
aio_suspend
mq_timedreceive
mq_timedsend
timer_gettime
timer_settime
* libanl:
gai_suspend
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/* Copyright (C) 2008-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SYS_TIMERFD_H
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#define _SYS_TIMERFD_H 1
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#include <time.h>
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#include <bits/types/struct_itimerspec.h>
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/* Get the platform-dependent flags. */
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#include <bits/timerfd.h>
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/* Bits to be set in the FLAGS parameter of `timerfd_settime'. */
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enum
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{
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TFD_TIMER_ABSTIME = 1 << 0,
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#define TFD_TIMER_ABSTIME TFD_TIMER_ABSTIME
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TFD_TIMER_CANCEL_ON_SET = 1 << 1
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#define TFD_TIMER_CANCEL_ON_SET TFD_TIMER_CANCEL_ON_SET
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};
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__BEGIN_DECLS
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/* Return file descriptor for new interval timer source. */
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extern int timerfd_create (__clockid_t __clock_id, int __flags) __THROW;
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/* Set next expiration time of interval timer source UFD to UTMR. If
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FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is
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absolute. Optionally return the old expiration time in OTMR. */
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extern int timerfd_settime (int __ufd, int __flags,
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const struct itimerspec *__utmr,
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struct itimerspec *__otmr) __THROW;
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#ifdef __USE_TIME_BITS64
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# if defined(__REDIRECT_NTH)
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extern int __REDIRECT_NTH (timerfd_settime,
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(int __ufd, int __flags,
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const struct itimerspec *__restrict __value,
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struct itimerspec *__restrict __ovalue),
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__timerfd_settime64);
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# else
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# define timerfd_settime __timerfd_settime64
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# endif
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#endif
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/* Return the next expiration time of UFD. */
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extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) __THROW;
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#ifdef __USE_TIME_BITS64
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# if defined(__REDIRECT_NTH)
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extern int __REDIRECT_NTH (timerfd_gettime, (int __ufd,
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struct itimerspec *__otmr),
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__timerfd_gettime64);
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# else
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# define timerfd_gettime __timerfd_gettime64
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# endif
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#endif
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__END_DECLS
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#endif /* sys/timerfd.h */
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