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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>
63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
/* sem_timedwait -- wait on a semaphore with timeout.
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Copyright (C) 2003-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
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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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#include <time.h>
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#include "semaphoreP.h"
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#include "sem_waitcommon.c"
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/* This is in a separate file because because sem_timedwait is only provided
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if __USE_XOPEN2K is defined. */
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int
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___sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime)
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{
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if (! valid_nanoseconds (abstime->tv_nsec))
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{
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__set_errno (EINVAL);
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return -1;
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}
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/* Check sem_wait.c for a more detailed explanation why it is required. */
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__pthread_testcancel ();
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if (__new_sem_wait_fast ((struct new_sem *) sem, 0) == 0)
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return 0;
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else
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return __new_sem_wait_slow64 ((struct new_sem *) sem,
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CLOCK_REALTIME, abstime);
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}
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#if __TIMESIZE == 64
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strong_alias (___sem_timedwait64, ___sem_timedwait)
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#else /* __TIMESPEC64 != 64 */
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strong_alias (___sem_timedwait64, __sem_timedwait64)
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libc_hidden_def (__sem_timedwait64)
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int
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___sem_timedwait (sem_t *sem, const struct timespec *abstime)
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{
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struct __timespec64 ts64 = valid_timespec_to_timespec64 (*abstime);
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return __sem_timedwait64 (sem, &ts64);
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}
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#endif /* __TIMESPEC64 != 64 */
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versioned_symbol (libc, ___sem_timedwait, sem_timedwait, GLIBC_2_34);
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#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
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compat_symbol (libpthread, ___sem_timedwait, sem_timedwait, GLIBC_2_2);
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#endif
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