2 * Copyright (c) 1996, 1997
3 * HD Associates, Inc. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by HD Associates, Inc
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17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
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35 /* semaphore.h: POSIX 1003.1b semaphores */
40 /* Opaque type definition. */
42 typedef struct sem * sem_t;
44 #define SEM_FAILED ((sem_t *)0)
45 #define SEM_VALUE_MAX (~0U) /* Equivalent to UINT_MAX. */
48 #include <sys/cdefs.h>
51 int sem_close(sem_t *);
52 int sem_destroy(sem_t *);
53 int sem_getvalue(sem_t * __restrict, int * __restrict);
54 int sem_init(sem_t *, int, unsigned int);
55 sem_t *sem_open(const char *, int, ...);
56 int sem_post(sem_t *);
57 int sem_trywait(sem_t *);
58 int sem_unlink(const char *);
59 int sem_wait(sem_t *);
64 #endif /* !_SEMAPHORE_H_ */