1 /* Copyright (C) 1995-2021 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 # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." 20 #endif 21 22 #include <bits/types.h> 23 #include <bits/wordsize.h> 24 #include <bits/shmlba.h> 25 26 /* Permission flag for shmget. */ 27 #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ 28 #define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */ 29 30 /* Flags for `shmat'. */ 31 #define SHM_RDONLY 010000 /* attach read-only else read-write */ 32 #define SHM_RND 020000 /* round attach address to SHMLBA */ 33 #define SHM_REMAP 040000 /* take-over region on attach */ 34 #define SHM_EXEC 0100000 /* execution access */ 35 36 /* Commands for `shmctl'. */ 37 #define SHM_LOCK 11 /* lock segment (root only) */ 38 #define SHM_UNLOCK 12 /* unlock segment (root only) */ 39 40 __BEGIN_DECLS 41 42 /* Type to count number of attaches. */ 43 typedef __syscall_ulong_t shmatt_t; 44 45 #include <bits/types/struct_shmid_ds.h> 46 #include <bits/types/struct_shmid64_ds.h> 47 48 #ifdef __USE_MISC 49 50 /* ipcs ctl commands */ 51 # define SHM_STAT 13 52 # define SHM_INFO 14 53 # define SHM_STAT_ANY 15 54 55 /* shm_mode upper byte flags */ 56 # define SHM_DEST 01000 /* segment will be destroyed on last detach */ 57 # define SHM_LOCKED 02000 /* segment will not be swapped */ 58 # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ 59 # define SHM_NORESERVE 010000 /* don't check for reservations */ 60 61 struct shminfo 62 { 63 __syscall_ulong_t shmmax; 64 __syscall_ulong_t shmmin; 65 __syscall_ulong_t shmmni; 66 __syscall_ulong_t shmseg; 67 __syscall_ulong_t shmall; 68 __syscall_ulong_t __glibc_reserved1; 69 __syscall_ulong_t __glibc_reserved2; 70 __syscall_ulong_t __glibc_reserved3; 71 __syscall_ulong_t __glibc_reserved4; 72 }; 73 74 struct shm_info 75 { 76 int used_ids; 77 __syscall_ulong_t shm_tot; /* total allocated shm */ 78 __syscall_ulong_t shm_rss; /* total resident shm */ 79 __syscall_ulong_t shm_swp; /* total swapped shm */ 80 __syscall_ulong_t swap_attempts; 81 __syscall_ulong_t swap_successes; 82 }; 83 84 #endif /* __USE_MISC */ 85 86 __END_DECLS 87