reactos/posix/include/sys/sem.h
2002-10-29 04:45:58 +00:00

73 lines
1.9 KiB
C

/* $Id: sem.h,v 1.5 2002/10/29 04:45:21 rex Exp $
*/
/*
* sys/sem.h
*
* semaphore facility. Conforming to the Single UNIX(r) Specification
* Version 2, System Interface & Headers Issue 5
*
* This file is part of the ReactOS Operating System.
*
* Contributors:
* Created by KJK::Hyperion <noog@libero.it>
*
* THIS SOFTWARE IS NOT COPYRIGHTED
*
* This source code is offered for use in the public domain. You may
* use, modify or distribute it freely.
*
* This code is distributed in the hope that it will be useful but
* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
* DISCLAMED. This includes but is not limited to warranties of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#ifndef __SYS_SEM_H_INCLUDED__
#define __SYS_SEM_H_INCLUDED__
/* INCLUDES */
#include <sys/ipc.h>
/* OBJECTS */
/* TYPES */
struct semid_ds
{
struct ipc_perm sem_perm; /* operation permission structure */
unsigned short int sem_nsems; /* number of semaphores in set */
time_t sem_otime; /* last semop time */
time_t sem_ctime; /* last time changed by semctl() */
};
struct sembuf
{
unsigned short int sem_num; /* semaphore number */
short int sem_op; /* semaphore operation */
short int sem_flg; /* operation flags */
};
/* CONSTANTS */
/* Semaphore operation flags */
#define SEM_UNDO (0x00001000) /* Set up adjust on exit entry */
/* Command definitions for the function semctl() */
#define GETNCNT (1) /* Get semncnt */
#define GETPID (2) /* Get sempid */
#define GETVAL (3) /* Get semval */
#define GETALL (4) /* Get all cases of semval */
#define GETZCNT (5) /* Get semzcnt */
#define SETVAL (6) /* Set semval */
#define SETALL (7) /* Set all cases of semval */
/* PROTOTYPES */
int semctl(int, int, int, ...);
int semget(key_t, int, int);
int semop(int, struct sembuf *, size_t);
/* MACROS */
#endif /* __SYS_SEM_H_INCLUDED__ */
/* EOF */