d3b41bde96
This patch introduces gomp_sem_getcount wrapper, which uses sem_getvalue for POSIX and atomic loads for linux futex and accel. rtems for now remains broken. 2021-01-18 Jakub Jelinek <jakub@redhat.com> * config/linux/sem.h (gomp_sem_getcount): New function. * config/posix/sem.h (gomp_sem_getcount): New function. * config/posix/sem.c (gomp_sem_getcount): New function. * config/accel/sem.h (gomp_sem_getcount): New function. * task.c (task_fulfilled_p): Use gomp_sem_getcount. (omp_fulfill_event): Likewise.
99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/* Copyright (C) 2005-2021 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Offloading and Multi Processing Library
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(libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This is the default POSIX 1003.1b implementation of a semaphore
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synchronization mechanism for libgomp. This type is private to
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the library.
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This is a bit heavy weight for what we need, in that we're not
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interested in sem_wait as a cancelation point, but it's not too
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bad for a default. */
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#ifndef GOMP_SEM_H
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#define GOMP_SEM_H 1
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#ifdef HAVE_ATTRIBUTE_VISIBILITY
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# pragma GCC visibility push(default)
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#endif
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#include <semaphore.h>
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#ifdef HAVE_ATTRIBUTE_VISIBILITY
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# pragma GCC visibility pop
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#endif
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#ifdef HAVE_BROKEN_POSIX_SEMAPHORES
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#include <pthread.h>
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struct gomp_sem
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{
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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int value;
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};
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typedef struct gomp_sem gomp_sem_t;
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extern void gomp_sem_init (gomp_sem_t *sem, int value);
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extern void gomp_sem_wait (gomp_sem_t *sem);
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extern void gomp_sem_post (gomp_sem_t *sem);
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extern void gomp_sem_destroy (gomp_sem_t *sem);
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extern int gomp_sem_getcount (gomp_sem_t *sem);
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#else /* HAVE_BROKEN_POSIX_SEMAPHORES */
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typedef sem_t gomp_sem_t;
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static inline void gomp_sem_init (gomp_sem_t *sem, int value)
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{
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sem_init (sem, 0, value);
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}
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extern void gomp_sem_wait (gomp_sem_t *sem);
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static inline void gomp_sem_post (gomp_sem_t *sem)
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{
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sem_post (sem);
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}
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static inline void gomp_sem_destroy (gomp_sem_t *sem)
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{
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sem_destroy (sem);
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}
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static inline int gomp_sem_getcount (gomp_sem_t *sem)
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{
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int val;
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if (sem_getvalue (sem, &val) < 0)
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return -1;
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return val;
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}
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#endif /* doesn't HAVE_BROKEN_POSIX_SEMAPHORES */
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#endif /* GOMP_SEM_H */
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