2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2010 David Xu <davidxu@freebsd.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 /* semaphore.h: POSIX 1003.1b semaphores */
37 #include <sys/cdefs.h>
38 #include <sys/_types.h>
39 #include <sys/_umtx.h>
41 #include <machine/_limits.h>
46 __uint32_t _padding; /* Preserve structure size */
49 typedef struct _sem sem_t;
51 #define SEM_FAILED ((sem_t *)0)
52 #define SEM_VALUE_MAX __INT_MAX
58 int sem_clockwait_np(sem_t * __restrict, __clockid_t, int,
59 const struct timespec *, struct timespec *);
61 int sem_close(sem_t *);
62 int sem_destroy(sem_t *);
63 int sem_getvalue(sem_t * __restrict, int * __restrict);
64 int sem_init(sem_t *, int, unsigned int);
65 sem_t *sem_open(const char *, int, ...);
66 int sem_post(sem_t *);
67 int sem_timedwait(sem_t * __restrict, const struct timespec * __restrict);
68 int sem_trywait(sem_t *);
69 int sem_unlink(const char *);
70 int sem_wait(sem_t *);
73 #endif /* !_SEMAPHORE_H_ */