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/* Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <sys/sem.h>
#include "ipc.h"
#ifdef L_semctl
/* Return identifier for array of NSEMS semaphores associated with
KEY. */
#include <stdarg.h>
/* Define a `union semun' suitable for Linux here. */
union semun
{
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short int *array; /* array for GETALL & SETALL */
struct seminfo *__buf; /* buffer for IPC_INFO */
};
int
semctl (int semid, int semnum, int cmd, ...)
{
union semun arg;
va_list ap;
va_start (ap, cmd);
/* Get the argument. */
arg = va_arg (ap, union semun);
va_end (ap);
return __ipc(IPCOP_semctl, semid, semnum, cmd, &arg);
}
#endif
#ifdef L_semget
#include <stdlib.h> /* for definition of NULL */
/* Return identifier for array of NSEMS semaphores associated with
KEY. */
int
semget (key, nsems, semflg)
key_t key;
int nsems;
int semflg;
{
return __ipc(IPCOP_semget, key, nsems, semflg, NULL);
}
#endif
#ifdef L_semop
/* Perform user-defined atomical operation of array of semaphores. */
int
semop (semid, sops, nsops)
int semid;
struct sembuf *sops;
size_t nsops;
{
return __ipc(IPCOP_semop, semid, (int) nsops, 0, sops);
}
#endif
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