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72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/* $Id: sem.h,v 1.3 2002/05/17 01:37:15 hyperion Exp $
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*/
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/*
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* sys/sem.h
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*
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* semaphore facility. Conforming to the Single UNIX(r) Specification
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* Version 2, System Interface & Headers Issue 5
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*
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* This file is part of the ReactOS Operating System.
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*
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* Contributors:
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* Created by KJK::Hyperion <noog@libero.it>
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*
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* THIS SOFTWARE IS NOT COPYRIGHTED
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*
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* This source code is offered for use in the public domain. You may
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* use, modify or distribute it freely.
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*
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* This code is distributed in the hope that it will be useful but
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* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
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* DISCLAMED. This includes but is not limited to warranties of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*/
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#ifndef __SYS_SEM_H_INCLUDED__
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#define __SYS_SEM_H_INCLUDED__
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/* INCLUDES */
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#include <sys/ipc.h>
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/* OBJECTS */
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/* TYPES */
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struct semid_ds
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{
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struct ipc_perm sem_perm; /* operation permission structure */
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unsigned short int sem_nsems; /* number of semaphores in set */
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time_t sem_otime; /* last semop time */
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time_t sem_ctime; /* last time changed by semctl() */
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};
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struct sembuf
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{
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unsigned short int sem_num; /* semaphore number */
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short int sem_op; /* semaphore operation */
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short int sem_flg; /* operation flags */
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};
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/* CONSTANTS */
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/* Semaphore operation flags */
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#define SEM_UNDO (0x00001000) /* Set up adjust on exit entry */
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/* Command definitions for the function semctl() */
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#define GETNCNT (1) /* Get semncnt */
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#define GETPID (2) /* Get sempid */
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#define GETVAL (3) /* Get semval */
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#define GETALL (4) /* Get all cases of semval */
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#define GETZCNT (5) /* Get semzcnt */
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#define SETVAL (6) /* Set semval */
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#define SETALL (7) /* Set all cases of semval */
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/* PROTOTYPES */
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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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/* MACROS */
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#endif /* __SYS_SEM_H_INCLUDED__ */
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/* EOF */
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