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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>
/* arg for semctl system calls. */
union semun {
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short *array; /* array for GETALL & SETALL */
struct seminfo *__buf; /* buffer for IPC_INFO */
void *__pad;
};
#ifdef __NR_semctl
#define __NR___semctl __NR_semctl
static inline _syscall4(int, __semctl, int, semid, int, semnum, int, cmd, union semun *, arg);
#endif
int semctl(int semid, int semnum, int cmd, ...)
{
union semun arg;
va_list ap;
/* Get the argument. */
va_start (ap, cmd);
arg = va_arg (ap, union semun);
va_end (ap);
#ifdef __NR_semctl
return __semctl(semid, semnum, cmd, &arg);
#else
return __ipc(IPCOP_semctl, semid, semnum, cmd, &arg);
#endif
}
#endif
#ifdef L_semget
/* for definition of NULL */
#include <stdlib.h>
#ifdef __NR_semget
_syscall3(int, semget, key_t, key, int, nsems, int, semflg);
#else
/* Return identifier for array of NSEMS semaphores associated
* with KEY. */
int semget (key_t key, int nsems, int semflg)
{
return __ipc(IPCOP_semget, key, nsems, semflg, NULL);
}
#endif
#endif
#ifdef L_semop
#ifdef __NR_semop
_syscall3(int, semop, int, semid, struct sembuf *, sops, size_t, nsops);
#else
/* Perform user-defined atomical operation of array of semaphores. */
int semop (int semid, struct sembuf *sops, size_t nsops)
{
return __ipc(IPCOP_semop, semid, (int) nsops, 0, sops);
}
#endif
#endif
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