Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /* 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, see <http://www.gnu.org/licenses/>. */ #include <errno.h> #include <sys/sem.h> #include <stddef.h> #include <stdlib.h> /* for NULL */ #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, NULL); #endif } #endif #ifdef L_semget #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, 0); } #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, NULL); } #endif #endif #ifdef L_semtimedop #ifdef __NR_semtimedop _syscall4(int, semtimedop, int, semid, struct sembuf *, sops, size_t, nsops, const struct timespec *, timeout) #else int semtimedop(int semid, struct sembuf *sops, size_t nsops, const struct timespec *timeout) { return __syscall_ipc(IPCOP_semtimedop, semid, nsops, 0, sops, (void *) timeout); } #endif #endif |