/* 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, void *, 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 | __IPC_64, arg.__pad); #else return __syscall_ipc(IPCOP_semctl, semid, semnum, cmd | __IPC_64, &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 __syscall_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 __syscall_ipc(IPCOP_semop, semid, (int) nsops, 0, sops); } #endif #endif