122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
/* $NetBSD: sem.h,v 1.29 2009/01/19 19:39:41 christos Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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, this list of conditions and the following 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* SVID compatible sem.h file
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*
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* Author: Daniel Boulet
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*/
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#ifndef _SYS_SEM_H_
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#define _SYS_SEM_H_
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#include <sys/featuretest.h>
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#include <sys/ipc.h>
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struct semid_ds {
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struct ipc_perm sem_perm; /* operation permission struct */
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time_t sem_otime; /* last semop() time */
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unsigned long int __unused1;
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time_t sem_ctime; /* last time changed by semctl() */
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unsigned long int __unused2;
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unsigned long int sem_nsems; /* number of semaphores in set */
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unsigned long int __unused3;
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unsigned long int __unused4;
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};
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/*
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* semop's sops parameter structure
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*/
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struct sembuf {
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unsigned short sem_num; /* semaphore # */
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short sem_op; /* semaphore operation */
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short sem_flg; /* operation flags */
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};
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#define SEM_UNDO 0x1000 /* undo changes on process exit */
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/*
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* commands for semctl
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*/
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#define GETPID 11 /* get sempid */
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#define GETVAL 12 /* get semval */
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#define GETALL 13 /* get all semval's */
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#define GETNCNT 14 /* get semncnt */
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#define GETZCNT 15 /* get semzcnt */
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#define SETVAL 16 /* set semval */
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#define SETALL 17 /* set all semval's */
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#ifdef __USE_MISC
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/* ipcs ctl cmds */
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# define SEM_STAT 18
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# define SEM_INFO 19
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/*
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* semaphore info struct
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*/
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struct seminfo {
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int32_t semmap; /* # of entries in semaphore map */
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int32_t semmni; /* # of semaphore identifiers */
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int32_t semmns; /* # of semaphores in system */
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int32_t semmnu; /* # of undo structures in system */
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int32_t semmsl; /* max # of semaphores per id */
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int32_t semopm; /* max # of operations per semop call */
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int32_t semume; /* max # of undo entries per process */
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int32_t semusz; /* size in bytes of undo structure */
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int32_t semvmx; /* semaphore maximum value */
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int32_t semaem; /* adjust on exit max value */
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};
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#endif /* __USE_MISC */
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/*
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* Configuration parameters
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*/
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#define SEMMNI 128
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#define SEMMSL 250
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#define SEMMNS (SEMMSL*SEMMNI)
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#define SEMOPM 32
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#define SEMVMX 32767
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int semctl(int, int, int, ...);
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int semget(key_t, int, int);
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int semop(int, struct sembuf *, size_t);
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__END_DECLS
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#endif /* !_SYS_SEM_H_ */
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