| 1 | /*- |
| 2 | * SPDX-License-Identifier: BSD-2-Clause |
| 3 | * |
| 4 | * Copyright (c) 2010 David Xu <davidxu@freebsd.org> |
| 5 | * |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice unmodified, this list of conditions, and the following |
| 13 | * disclaimer. |
| 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. |
| 17 | * |
| 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. |
| 28 | */ |
| 29 | |
| 30 | /* semaphore.h: POSIX 1003.1b semaphores */ |
| 31 | |
| 32 | #ifndef _SEMAPHORE_H_ |
| 33 | #define _SEMAPHORE_H_ |
| 34 | |
| 35 | #include <sys/cdefs.h> |
| 36 | #include <sys/_types.h> |
| 37 | #include <sys/_umtx.h> |
| 38 | |
| 39 | #include <machine/_limits.h> |
| 40 | |
| 41 | struct _sem { |
| 42 | __uint32_t _magic; |
| 43 | struct _usem2 _kern; |
| 44 | __uint32_t _padding; /* Preserve structure size */ |
| 45 | }; |
| 46 | |
| 47 | typedef struct _sem sem_t; |
| 48 | |
| 49 | #define SEM_FAILED ((sem_t *)0) |
| 50 | #define SEM_VALUE_MAX __INT_MAX |
| 51 | |
| 52 | struct timespec; |
| 53 | |
| 54 | __BEGIN_DECLS |
| 55 | #if __BSD_VISIBLE |
| 56 | int sem_clockwait_np(sem_t * __restrict, __clockid_t, int, |
| 57 | const struct timespec *, struct timespec *); |
| 58 | #endif |
| 59 | int sem_close(sem_t *); |
| 60 | int sem_destroy(sem_t *); |
| 61 | int sem_getvalue(sem_t * __restrict, int * __restrict); |
| 62 | int sem_init(sem_t *, int, unsigned int); |
| 63 | sem_t *sem_open(const char *, int, ...); |
| 64 | int sem_post(sem_t *); |
| 65 | int sem_timedwait(sem_t * __restrict, const struct timespec * __restrict); |
| 66 | int sem_trywait(sem_t *); |
| 67 | int sem_unlink(const char *); |
| 68 | int sem_wait(sem_t *); |
| 69 | __END_DECLS |
| 70 | |
| 71 | #endif /* !_SEMAPHORE_H_ */ |