89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* Copyright (C) 2005-2020 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);
|
|
|
|
#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);
|
|
}
|
|
#endif /* doesn't HAVE_BROKEN_POSIX_SEMAPHORES */
|
|
#endif /* GOMP_SEM_H */
|