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- /* Copyright (C) 2005-2022 Free Software Foundation, Inc.
- Contributed by Richard Henderson <rth@redhat.com>.
- This file is part of the GNU Offloading and Multi Processing Library
- (libgomp).
- Libgomp is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3, or (at your option)
- any later version.
- Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- more details.
- Under Section 7 of GPL version 3, you are granted additional
- permissions described in the GCC Runtime Library Exception, version
- 3.1, as published by the Free Software Foundation.
- You should have received a copy of the GNU General Public License and
- a copy of the GCC Runtime Library Exception along with this program;
- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- <http://www.gnu.org/licenses/>. */
- /* This is the default POSIX 1003.1b implementation of a semaphore
- synchronization mechanism for libgomp. This type is private to
- the library.
- This is a bit heavy weight for what we need, in that we're not
- interested in sem_wait as a cancelation point, but it's not too
- bad for a default. */
- #ifndef GOMP_SEM_H
- #define GOMP_SEM_H 1
- #ifdef HAVE_ATTRIBUTE_VISIBILITY
- # pragma GCC visibility push(default)
- #endif
- #include <semaphore.h>
- #ifdef HAVE_ATTRIBUTE_VISIBILITY
- # pragma GCC visibility pop
- #endif
- #ifdef HAVE_BROKEN_POSIX_SEMAPHORES
- #include <pthread.h>
- struct gomp_sem
- {
- pthread_mutex_t mutex;
- pthread_cond_t cond;
- int value;
- };
- typedef struct gomp_sem gomp_sem_t;
- extern void gomp_sem_init (gomp_sem_t *sem, int value);
- extern void gomp_sem_wait (gomp_sem_t *sem);
- extern void gomp_sem_post (gomp_sem_t *sem);
- extern void gomp_sem_destroy (gomp_sem_t *sem);
- extern int gomp_sem_getcount (gomp_sem_t *sem);
- #else /* HAVE_BROKEN_POSIX_SEMAPHORES */
- typedef sem_t gomp_sem_t;
- static inline void gomp_sem_init (gomp_sem_t *sem, int value)
- {
- sem_init (sem, 0, value);
- }
- extern void gomp_sem_wait (gomp_sem_t *sem);
- static inline void gomp_sem_post (gomp_sem_t *sem)
- {
- sem_post (sem);
- }
- static inline void gomp_sem_destroy (gomp_sem_t *sem)
- {
- sem_destroy (sem);
- }
- static inline int gomp_sem_getcount (gomp_sem_t *sem)
- {
- int val;
- if (sem_getvalue (sem, &val) < 0)
- return -1;
- return val;
- }
- #endif /* doesn't HAVE_BROKEN_POSIX_SEMAPHORES */
- #endif /* GOMP_SEM_H */
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