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The internal semaphore list code is moved to a specific file, sem_routine.c, and the internal usage is simplified to only two functions (one to insert a new semaphore and one to remove it from the internal list). There is no need to expose the internal locking, neither how the semaphore mapping is implemented. No functional or semantic change is expected, tested on x86_64-linux-gnu.
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/* Copyright (C) 2002-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Ulrich Drepper <drepper@redhat.com>, 2002.
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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 <semaphore.h>
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#include <futex-internal.h>
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#include "pthreadP.h"
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#define SEM_SHM_PREFIX "sem."
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static inline void __new_sem_open_init (struct new_sem *sem, unsigned value)
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{
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#if __HAVE_64B_ATOMICS
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sem->data = value;
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#else
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sem->value = value << SEM_VALUE_SHIFT;
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sem->nwaiters = 0;
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#endif
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/* pad is used as a mutex on pre-v9 sparc and ignored otherwise. */
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sem->pad = 0;
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/* This always is a shared semaphore. */
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sem->private = FUTEX_SHARED;
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}
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/* Prototypes of functions with multiple interfaces. */
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extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value);
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extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value);
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extern int __new_sem_destroy (sem_t *sem);
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extern int __new_sem_post (sem_t *sem);
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extern int __new_sem_wait (sem_t *sem);
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extern int __old_sem_wait (sem_t *sem);
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extern int __new_sem_trywait (sem_t *sem);
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extern int __new_sem_getvalue (sem_t *sem, int *sval);
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#if __TIMESIZE == 64
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# define __sem_clockwait64 __sem_clockwait
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# define __sem_timedwait64 __sem_timedwait
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#else
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extern int
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__sem_clockwait64 (sem_t *sem, clockid_t clockid,
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const struct __timespec64 *abstime);
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libpthread_hidden_proto (__sem_clockwait64)
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extern int
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__sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime);
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libpthread_hidden_proto (__sem_timedwait64)
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#endif
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