/* 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