1 /* Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
2 Contributed by Richard Henderson <rth@redhat.com>.
4 This file is part of the GNU OpenMP Library (libgomp).
6 Libgomp is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
25 /* This is the default POSIX 1003.1b implementation of a semaphore
26 synchronization mechanism for libgomp. This type is private to
29 This is a bit heavy weight for what we need, in that we're not
30 interested in sem_wait as a cancelation point, but it's not too
36 #ifdef HAVE_ATTRIBUTE_VISIBILITY
37 # pragma GCC visibility push(default)
40 #include <semaphore.h>
42 #ifdef HAVE_ATTRIBUTE_VISIBILITY
43 # pragma GCC visibility pop
46 #ifdef HAVE_BROKEN_POSIX_SEMAPHORES
51 pthread_mutex_t mutex
;
56 typedef struct gomp_sem gomp_sem_t
;
58 extern void gomp_sem_init (gomp_sem_t
*sem
, int value
);
60 extern void gomp_sem_wait (gomp_sem_t
*sem
);
62 extern void gomp_sem_post (gomp_sem_t
*sem
);
64 extern void gomp_sem_destroy (gomp_sem_t
*sem
);
66 #else /* HAVE_BROKEN_POSIX_SEMAPHORES */
68 typedef sem_t gomp_sem_t
;
70 static inline void gomp_sem_init (gomp_sem_t
*sem
, int value
)
72 sem_init (sem
, 0, value
);
75 extern void gomp_sem_wait (gomp_sem_t
*sem
);
77 static inline void gomp_sem_post (gomp_sem_t
*sem
)
82 static inline void gomp_sem_destroy (gomp_sem_t
*sem
)
86 #endif /* doesn't HAVE_BROKEN_POSIX_SEMAPHORES */
87 #endif /* GOMP_SEM_H */