lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Library General Public License as |
| 7 | published by the Free Software Foundation; either version 2 of the |
| 8 | License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Library General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Library General Public |
| 16 | License along with the GNU C Library; see the file COPYING.LIB. If not, |
| 17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 18 | Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include <errno.h> |
| 21 | #include <sys/sem.h> |
| 22 | #include <stddef.h> |
| 23 | #include <stdlib.h> /* for NULL */ |
| 24 | |
| 25 | #include "ipc.h" |
| 26 | |
| 27 | |
| 28 | #ifdef L_semctl |
| 29 | /* Return identifier for array of NSEMS semaphores associated with |
| 30 | KEY. */ |
| 31 | #include <stdarg.h> |
| 32 | /* arg for semctl system calls. */ |
| 33 | union semun { |
| 34 | int val; /* value for SETVAL */ |
| 35 | struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */ |
| 36 | unsigned short *array; /* array for GETALL & SETALL */ |
| 37 | struct seminfo *__buf; /* buffer for IPC_INFO */ |
| 38 | void *__pad; |
| 39 | }; |
| 40 | |
| 41 | |
| 42 | #ifdef __NR_semctl |
| 43 | #define __NR___semctl __NR_semctl |
| 44 | static __inline__ _syscall4(int, __semctl, int, semid, int, semnum, int, cmd, void *, arg) |
| 45 | #endif |
| 46 | |
| 47 | int semctl(int semid, int semnum, int cmd, ...) |
| 48 | { |
| 49 | union semun arg; |
| 50 | va_list ap; |
| 51 | |
| 52 | /* Get the argument. */ |
| 53 | va_start (ap, cmd); |
| 54 | arg = va_arg (ap, union semun); |
| 55 | va_end (ap); |
| 56 | #ifdef __NR_semctl |
| 57 | return __semctl(semid, semnum, cmd | __IPC_64, arg.__pad); |
| 58 | #else |
| 59 | return __syscall_ipc(IPCOP_semctl, semid, semnum, cmd|__IPC_64, &arg, NULL); |
| 60 | #endif |
| 61 | } |
| 62 | #endif |
| 63 | |
| 64 | #ifdef L_semget |
| 65 | #ifdef __NR_semget |
| 66 | _syscall3(int, semget, key_t, key, int, nsems, int, semflg) |
| 67 | |
| 68 | #else |
| 69 | /* Return identifier for array of NSEMS semaphores associated |
| 70 | * with KEY. */ |
| 71 | int semget (key_t key, int nsems, int semflg) |
| 72 | { |
| 73 | return __syscall_ipc(IPCOP_semget, key, nsems, semflg, NULL, 0); |
| 74 | } |
| 75 | #endif |
| 76 | #endif |
| 77 | |
| 78 | #ifdef L_semop |
| 79 | |
| 80 | #ifdef __NR_semop |
| 81 | _syscall3(int, semop, int, semid, struct sembuf *, sops, size_t, nsops) |
| 82 | |
| 83 | #else |
| 84 | /* Perform user-defined atomical operation of array of semaphores. */ |
| 85 | int semop (int semid, struct sembuf *sops, size_t nsops) |
| 86 | { |
| 87 | return __syscall_ipc(IPCOP_semop, semid, (int) nsops, 0, sops, NULL); |
| 88 | } |
| 89 | #endif |
| 90 | #endif |
| 91 | |
| 92 | #ifdef L_semtimedop |
| 93 | |
| 94 | #ifdef __NR_semtimedop |
| 95 | _syscall4(int, semtimedop, int, semid, struct sembuf *, sops, size_t, nsops, const struct timespec *, timeout) |
| 96 | |
| 97 | #else |
| 98 | |
| 99 | int semtimedop(int semid, struct sembuf *sops, size_t nsops, |
| 100 | const struct timespec *timeout) |
| 101 | { |
| 102 | return __syscall_ipc(IPCOP_semtimedop, semid, nsops, 0, sops, (void *) timeout); |
| 103 | } |
| 104 | #endif |
| 105 | #endif |