1 /* Linux/MIPS implementation of the shared memory struct shmid_ds. 2 Copyright (C) 2020-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the 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 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #ifndef _SYS_SHM_H 20 # error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead." 21 #endif 22 23 /* Data structure describing a shared memory segment. */ 24 struct shmid_ds 25 { 26 #ifdef __USE_TIME_BITS64 27 # include <bits/types/struct_shmid64_ds_helper.h> 28 #else 29 struct ipc_perm shm_perm; /* operation permission struct */ 30 size_t shm_segsz; /* size of segment in bytes */ 31 # if __TIMESIZE == 32 32 __time_t shm_atime; /* time of last shmat() */ 33 __time_t shm_dtime; /* time of last shmdt() */ 34 __time_t shm_ctime; /* time of last change by shmctl() */ 35 # else 36 __time_t shm_atime; /* time of last shmat() */ 37 __time_t shm_dtime; /* time of last shmdt() */ 38 __time_t shm_ctime; /* time of last change by shmctl() */ 39 # endif 40 __pid_t shm_cpid; /* pid of creator */ 41 __pid_t shm_lpid; /* pid of last shmop */ 42 shmatt_t shm_nattch; /* number of current attaches */ 43 # if __TIMESIZE == 32 44 unsigned short int __shm_atime_high; 45 unsigned short int __shm_dtime_high; 46 unsigned short int __shm_ctime_high; 47 unsigned short int __glibc_reserved4; 48 # else 49 __syscall_ulong_t __glibc_reserved5; 50 __syscall_ulong_t __glibc_reserved6; 51 # endif 52 #endif 53 };