2015-03-12 23:03:42 +08:00
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/*
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* Copyright (c) 2010 David Xu <davidxu@freebsd.org>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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2017-09-13 19:07:31 +08:00
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* $FreeBSD: head/include/semaphore.h 314424 2017-02-28 21:47:00Z vangyzen $
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2015-03-12 23:03:42 +08:00
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*/
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/* semaphore.h: POSIX 1003.1b semaphores */
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#ifndef _SEMAPHORE_H_
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#define _SEMAPHORE_H_
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#include <sys/cdefs.h>
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2017-09-13 19:07:31 +08:00
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#include <sys/lock.h>
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2015-03-12 23:03:42 +08:00
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#include <sys/_types.h>
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#include <sys/_timespec.h>
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2017-09-13 19:07:31 +08:00
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typedef struct {
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unsigned long _flags;
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struct _Semaphore_Control _Semaphore;
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} sem_t;
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2015-03-12 23:03:42 +08:00
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#define SEM_FAILED ((sem_t *)0)
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__BEGIN_DECLS
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int sem_close(sem_t *);
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int sem_destroy(sem_t *);
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int sem_getvalue(sem_t * __restrict, int * __restrict);
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int sem_init(sem_t *, int, unsigned int);
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sem_t *sem_open(const char *, int, ...);
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int sem_post(sem_t *);
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int sem_timedwait(sem_t * __restrict, const struct timespec * __restrict);
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int sem_trywait(sem_t *);
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int sem_unlink(const char *);
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int sem_wait(sem_t *);
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__END_DECLS
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#endif /* !_SEMAPHORE_H_ */
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