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/* Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <sys/sem.h>
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#include "ipc.h"
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#ifdef L_semctl
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/* Return identifier for array of NSEMS semaphores associated with
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KEY. */
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#include <stdarg.h>
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/* arg for semctl system calls. */
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union semun {
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int val; /* value for SETVAL */
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struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
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unsigned short *array; /* array for GETALL & SETALL */
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struct seminfo *__buf; /* buffer for IPC_INFO */
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void *__pad;
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};
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#ifdef __NR_semctl
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#define __NR___semctl __NR_semctl
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static inline _syscall4(int, __semctl, int, semid, int, semnum, int, cmd, union semun *, arg);
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#endif
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int semctl(int semid, int semnum, int cmd, ...)
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{
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union semun arg;
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va_list ap;
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/* Get the argument. */
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va_start (ap, cmd);
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arg = va_arg (ap, union semun);
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va_end (ap);
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#ifdef __NR_semctl
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return __semctl(semid, semnum, cmd, &arg);
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#else
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return __ipc(IPCOP_semctl, semid, semnum, cmd, &arg);
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#endif
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}
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#endif
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#ifdef L_semget
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/* for definition of NULL */
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#include <stdlib.h>
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#ifdef __NR_semget
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_syscall3(int, semget, key_t, key, int, nsems, int, semflg);
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#else
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/* Return identifier for array of NSEMS semaphores associated
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* with KEY. */
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int semget (key_t key, int nsems, int semflg)
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{
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return __ipc(IPCOP_semget, key, nsems, semflg, NULL);
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}
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#endif
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#endif
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#ifdef L_semop
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#ifdef __NR_semop
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_syscall3(int, semop, int, semid, struct sembuf *, sops, size_t, nsops);
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#else
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/* Perform user-defined atomical operation of array of semaphores. */
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int semop (int semid, struct sembuf *sops, size_t nsops)
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{
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return __ipc(IPCOP_semop, semid, (int) nsops, 0, sops);
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}
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#endif
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#endif
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