72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org>
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* $FreeBSD$
|
||
|
|
*/
|
||
|
|
#ifndef __SEMAPHORE_H_
|
||
|
|
#define __SEMAPHORE_H_
|
||
|
|
|
||
|
|
typedef intptr_t semid_t;
|
||
|
|
|
||
|
|
#ifndef _KERNEL
|
||
|
|
|
||
|
|
#include <sys/cdefs.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Semaphore definitions.
|
||
|
|
*/
|
||
|
|
struct sem {
|
||
|
|
#define SEM_MAGIC ((u_int32_t) 0x09fa4012)
|
||
|
|
u_int32_t magic;
|
||
|
|
pthread_mutex_t lock;
|
||
|
|
pthread_cond_t gtzero;
|
||
|
|
u_int32_t count;
|
||
|
|
u_int32_t nwaiters;
|
||
|
|
#define SEM_USER (NULL)
|
||
|
|
semid_t semid; /* semaphore id if kernel (shared) semaphore */
|
||
|
|
int syssem; /* 1 if kernel (shared) semaphore */
|
||
|
|
LIST_ENTRY(sem) entry;
|
||
|
|
struct sem **backpointer;
|
||
|
|
};
|
||
|
|
|
||
|
|
__BEGIN_DECLS
|
||
|
|
|
||
|
|
int ksem_close(semid_t id);
|
||
|
|
int ksem_post(semid_t id);
|
||
|
|
int ksem_wait(semid_t id);
|
||
|
|
int ksem_trywait(semid_t id);
|
||
|
|
int ksem_init(semid_t *idp, unsigned int value);
|
||
|
|
int ksem_open(semid_t *idp, const char *name, int oflag, mode_t mode,
|
||
|
|
unsigned int value);
|
||
|
|
int ksem_unlink(const char *name);
|
||
|
|
int ksem_getvalue(semid_t id, int *val);
|
||
|
|
int ksem_destroy(semid_t id);
|
||
|
|
|
||
|
|
__END_DECLS
|
||
|
|
|
||
|
|
#endif /* !_KERNEL */
|
||
|
|
|
||
|
|
#endif /* __SEMAPHORE_H_ */
|