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Add: int sem_clockwait (sem_t *sem, clockid_t clock, const struct timespec *abstime) which behaves just like sem_timedwait, but measures abstime against the specified clock. Currently supports CLOCK_REALTIME and CLOCK_MONOTONIC and sets errno == EINVAL if any other clock is specified. * nptl/sem_waitcommon.c (do_futex_wait, __new_sem_wait_slow): Add clockid parameters to indicate the clock which abstime should be measured against. * nptl/sem_timedwait.c (sem_timedwait), nptl/sem_wait.c (__new_sem_wait): Pass CLOCK_REALTIME as clockid to __new_sem_wait_slow. * nptl/sem_clockwait.c: New file to implement sem_clockwait based on sem_timedwait.c. * nptl/Makefile: Add sem_clockwait.c source file. Add CFLAGS for sem_clockwait.c to match those used for sem_timedwait.c. * sysdeps/pthread/semaphore.h: Add sem_clockwait. * nptl/Versions (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/aarch64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/alpha/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/arm/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/csky/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/hppa/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/i386/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/ia64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/microblaze/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/nios2/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sh/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libpthread.abilist (GLIBC_2.30): Likewise. * nptl/tst-sem17.c: Add new test for passing invalid clock to sem_clockwait. * nptl/tst-sem13.c, nptl/tst-sem5.c: Modify existing sem_timedwait tests to also test sem_clockwait. * manual/threads.texi: Document sem_clockwait. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/* Copyright (C) 2002-2019 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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<http://www.gnu.org/licenses/>. */
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#ifndef _SEMAPHORE_H
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#define _SEMAPHORE_H 1
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#include <features.h>
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#include <sys/types.h>
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#ifdef __USE_XOPEN2K
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# include <bits/types/struct_timespec.h>
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#endif
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/* Get the definition for sem_t. */
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#include <bits/semaphore.h>
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__BEGIN_DECLS
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/* Initialize semaphore object SEM to VALUE. If PSHARED then share it
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with other processes. */
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extern int sem_init (sem_t *__sem, int __pshared, unsigned int __value)
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__THROW __nonnull ((1));
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/* Free resources associated with semaphore object SEM. */
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extern int sem_destroy (sem_t *__sem) __THROW __nonnull ((1));
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/* Open a named semaphore NAME with open flags OFLAG. */
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extern sem_t *sem_open (const char *__name, int __oflag, ...)
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__THROW __nonnull ((1));
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/* Close descriptor for named semaphore SEM. */
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extern int sem_close (sem_t *__sem) __THROW __nonnull ((1));
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/* Remove named semaphore NAME. */
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extern int sem_unlink (const char *__name) __THROW __nonnull ((1));
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/* Wait for SEM being posted.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int sem_wait (sem_t *__sem) __nonnull ((1));
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#ifdef __USE_XOPEN2K
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/* Similar to `sem_wait' but wait only until ABSTIME.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int sem_timedwait (sem_t *__restrict __sem,
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const struct timespec *__restrict __abstime)
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__nonnull ((1, 2));
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#endif
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#ifdef __USE_GNU
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extern int sem_clockwait (sem_t *__restrict __sem,
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clockid_t clock,
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const struct timespec *__restrict __abstime)
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__nonnull ((1, 3));
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#endif
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/* Test whether SEM is posted. */
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extern int sem_trywait (sem_t *__sem) __THROWNL __nonnull ((1));
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/* Post SEM. */
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extern int sem_post (sem_t *__sem) __THROWNL __nonnull ((1));
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/* Get current value of SEM and store it in *SVAL. */
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extern int sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval)
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__THROW __nonnull ((1, 2));
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__END_DECLS
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#endif /* semaphore.h */
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