1*404b540aSrobert /* Copyright (C) 2005, 2006 Free Software Foundation, Inc.
2*404b540aSrobert Contributed by Richard Henderson <rth@redhat.com>.
3*404b540aSrobert
4*404b540aSrobert This file is part of the GNU OpenMP Library (libgomp).
5*404b540aSrobert
6*404b540aSrobert Libgomp is free software; you can redistribute it and/or modify it
7*404b540aSrobert under the terms of the GNU Lesser General Public License as published by
8*404b540aSrobert the Free Software Foundation; either version 2.1 of the License, or
9*404b540aSrobert (at your option) any later version.
10*404b540aSrobert
11*404b540aSrobert Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
12*404b540aSrobert WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13*404b540aSrobert FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
14*404b540aSrobert more details.
15*404b540aSrobert
16*404b540aSrobert You should have received a copy of the GNU Lesser General Public License
17*404b540aSrobert along with libgomp; see the file COPYING.LIB. If not, write to the
18*404b540aSrobert Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19*404b540aSrobert MA 02110-1301, USA. */
20*404b540aSrobert
21*404b540aSrobert /* As a special exception, if you link this library with other files, some
22*404b540aSrobert of which are compiled with GCC, to produce an executable, this library
23*404b540aSrobert does not by itself cause the resulting executable to be covered by the
24*404b540aSrobert GNU General Public License. This exception does not however invalidate
25*404b540aSrobert any other reasons why the executable file might be covered by the GNU
26*404b540aSrobert General Public License. */
27*404b540aSrobert
28*404b540aSrobert /* This is the default POSIX 1003.1b implementation of a semaphore
29*404b540aSrobert synchronization mechanism for libgomp. This type is private to
30*404b540aSrobert the library.
31*404b540aSrobert
32*404b540aSrobert This is a bit heavy weight for what we need, in that we're not
33*404b540aSrobert interested in sem_wait as a cancelation point, but it's not too
34*404b540aSrobert bad for a default. */
35*404b540aSrobert
36*404b540aSrobert #ifndef GOMP_SEM_H
37*404b540aSrobert #define GOMP_SEM_H 1
38*404b540aSrobert
39*404b540aSrobert #ifdef HAVE_ATTRIBUTE_VISIBILITY
40*404b540aSrobert # pragma GCC visibility push(default)
41*404b540aSrobert #endif
42*404b540aSrobert
43*404b540aSrobert #include <semaphore.h>
44*404b540aSrobert
45*404b540aSrobert #ifdef HAVE_ATTRIBUTE_VISIBILITY
46*404b540aSrobert # pragma GCC visibility pop
47*404b540aSrobert #endif
48*404b540aSrobert
49*404b540aSrobert #ifdef HAVE_BROKEN_POSIX_SEMAPHORES
50*404b540aSrobert #include <pthread.h>
51*404b540aSrobert
52*404b540aSrobert struct gomp_sem
53*404b540aSrobert {
54*404b540aSrobert pthread_mutex_t mutex;
55*404b540aSrobert pthread_cond_t cond;
56*404b540aSrobert int value;
57*404b540aSrobert };
58*404b540aSrobert
59*404b540aSrobert typedef struct gomp_sem gomp_sem_t;
60*404b540aSrobert
61*404b540aSrobert extern void gomp_sem_init (gomp_sem_t *sem, int value);
62*404b540aSrobert
63*404b540aSrobert extern void gomp_sem_wait (gomp_sem_t *sem);
64*404b540aSrobert
65*404b540aSrobert extern void gomp_sem_post (gomp_sem_t *sem);
66*404b540aSrobert
67*404b540aSrobert extern void gomp_sem_destroy (gomp_sem_t *sem);
68*404b540aSrobert
69*404b540aSrobert #else /* HAVE_BROKEN_POSIX_SEMAPHORES */
70*404b540aSrobert
71*404b540aSrobert typedef sem_t gomp_sem_t;
72*404b540aSrobert
gomp_sem_init(gomp_sem_t * sem,int value)73*404b540aSrobert static inline void gomp_sem_init (gomp_sem_t *sem, int value)
74*404b540aSrobert {
75*404b540aSrobert sem_init (sem, 0, value);
76*404b540aSrobert }
77*404b540aSrobert
78*404b540aSrobert extern void gomp_sem_wait (gomp_sem_t *sem);
79*404b540aSrobert
gomp_sem_post(gomp_sem_t * sem)80*404b540aSrobert static inline void gomp_sem_post (gomp_sem_t *sem)
81*404b540aSrobert {
82*404b540aSrobert sem_post (sem);
83*404b540aSrobert }
84*404b540aSrobert
gomp_sem_destroy(gomp_sem_t * sem)85*404b540aSrobert static inline void gomp_sem_destroy (gomp_sem_t *sem)
86*404b540aSrobert {
87*404b540aSrobert sem_destroy (sem);
88*404b540aSrobert }
89*404b540aSrobert #endif /* doesn't HAVE_BROKEN_POSIX_SEMAPHORES */
90*404b540aSrobert #endif /* GOMP_SEM_H */
91