1 /* Copyright (C) 1995-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _SYS_SHM_H 19 #define _SYS_SHM_H 1 20 21 #include <features.h> 22 23 #define __need_size_t 24 #include <stddef.h> 25 26 /* Get common definition of System V style IPC. */ 27 #include <sys/ipc.h> 28 29 /* Get system dependent definition of `struct shmid_ds' and more. */ 30 #include <bits/shm.h> 31 32 /* Define types required by the standard. */ 33 #include <bits/types/time_t.h> 34 35 #ifdef __USE_XOPEN 36 # ifndef __pid_t_defined 37 typedef __pid_t pid_t; 38 # define __pid_t_defined 39 # endif 40 #endif /* X/Open */ 41 42 43 __BEGIN_DECLS 44 45 /* The following System V style IPC functions implement a shared memory 46 facility. The definition is found in XPG4.2. */ 47 48 /* Shared memory control operation. */ 49 #ifndef __USE_TIME_BITS64 50 extern int shmctl (int __shmid, int __cmd, struct shmid_ds *__buf) __THROW; 51 #else 52 # ifdef __REDIRECT_NTH 53 extern int __REDIRECT_NTH (shmctl, 54 (int __shmid, int __cmd, struct shmid_ds *__buf), 55 __shmctl64); 56 # else 57 # define shmctl __shmctl64 58 # endif 59 #endif 60 61 /* Get shared memory segment. */ 62 extern int shmget (key_t __key, size_t __size, int __shmflg) __THROW; 63 64 /* Attach shared memory segment. */ 65 extern void *shmat (int __shmid, const void *__shmaddr, int __shmflg) 66 __THROW; 67 68 /* Detach shared memory segment. */ 69 extern int shmdt (const void *__shmaddr) __THROW; 70 71 __END_DECLS 72 73 #endif /* sys/shm.h */ 74