43 lines
1.6 KiB
C
43 lines
1.6 KiB
C
/* Linuxthreads - a simple clone()-based implementation of Posix */
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/* threads for Linux. */
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/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
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/* */
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/* This program is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU Library General Public License */
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/* as published by the Free Software Foundation; either version 2 */
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/* of the License, or (at your option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, */
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/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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/* GNU Library General Public License for more details. */
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#ifndef _SEMAPHORE_H
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#define _SEMAPHORE_H 1
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#include <features.h>
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#include <sys/types.h>
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#include <limits.h>
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#define SEM_VALUE_MAX INT_MAX
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typedef struct {
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struct { long status; int spinlock; } sem_lock;
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int sem_value;
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_pthread_descr sem_waiting;
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} sem_t;
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__BEGIN_DECLS
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extern int sem_init __P((sem_t *__sem, int __pshared, unsigned int __value));
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extern int sem_destroy __P((sem_t *__sem));
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extern int sem_wait __P((sem_t *__sem));
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extern int sem_trywait __P((sem_t *__sem));
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extern int sem_post __P((sem_t *__sem));
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extern int sem_getvalue __P((sem_t *__sem, int *__sval));
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__END_DECLS
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#endif /* semaphore.h */
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