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b8d3e8fbaa
The sem_clockwait and sem_timedwait have been converted to support 64 bit time.
This change reuses futex_abstimed_wait_cancelable64 function introduced earlier.
The sem_{clock|timed}wait only accepts absolute time. Moreover, there is no
need to check for NULL passed as *abstime pointer to the syscalls as both calls
have exported symbols marked with __nonull attribute for abstime.
For systems with __TIMESIZE != 64 && __WORDSIZE == 32:
- Conversion from 32 bit time to 64 bit struct __timespec64 was necessary
- Redirection to __sem_{clock|timed}wait64 will provide support for 64 bit
time
Build tests:
./src/scripts/build-many-glibcs.py glibcs
Run-time tests:
- Run specific tests on ARM/x86 32bit systems (qemu):
https://github.com/lmajewski/meta-y2038 and run tests:
https://github.com/lmajewski/y2038-tests/commits/master
Above tests were performed with Y2038 redirection applied as well as without
to test the proper usage of both __sem_{clock|timed}wait64 and
__sem_{clock|timed}wait.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* sem_timedwait -- wait on a semaphore with timeout.
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Copyright (C) 2003-2020 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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libpthread_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
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weak_alias (__sem_timedwait, sem_timedwait)
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