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