1 /* Copyright (C) 1995,1996,1997,2000,2001,2002,2003 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 <http://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 24 /* Permission flag for shmget. */ 25 #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ 26 #define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */ 27 28 /* Flags for `shmat'. */ 29 #define SHM_RDONLY 010000 /* attach read-only else read-write */ 30 #define SHM_RND 020000 /* round attach address to SHMLBA */ 31 #define SHM_REMAP 040000 /* take-over region on attach */ 32 33 /* Commands for `shmctl'. */ 34 #define SHM_LOCK 11 /* lock segment (root only) */ 35 #define SHM_UNLOCK 12 /* unlock segment (root only) */ 36 37 /* Segment low boundary address multiple. */ 38 #define SHMLBA 0x40000 39 40 41 /* Type to count number of attaches. */ 42 typedef unsigned long int shmatt_t; 43 44 /* Data structure describing a set of semaphores. */ 45 struct shmid_ds 46 { 47 struct ipc_perm shm_perm; /* operation permission struct */ 48 size_t shm_segsz; /* size of segment in bytes */ 49 #if (__WORDSIZE == 32) && defined(__UCLIBC_USE_TIME64__) 50 unsigned long int shm_atime_internal_1; /* time of last shmat() */ 51 unsigned long int shm_dtime_internal_1; /* time of last shmdt() */ 52 unsigned long int shm_ctime_internal_1; /* time of last change by shmctl() */ 53 #else 54 __time_t shm_atime; 55 __time_t shm_dtime; 56 __time_t shm_ctime; 57 #endif 58 __pid_t shm_cpid; /* pid of creator */ 59 __pid_t shm_lpid; /* pid of last shmop */ 60 shmatt_t shm_nattch; /* number of current attaches */ 61 #if (__WORDSIZE == 32) && defined(__UCLIBC_USE_TIME64__) 62 unsigned short int shm_atime_internal_2; /* time of last shmat() */ 63 unsigned short int shm_dtime_internal_2; /* time of last shmdt() */ 64 unsigned short int shm_ctime_internal_2; /* time of last change by shmctl() */ 65 unsigned short int __uclibc_unused1; 66 __time_t shm_atime; 67 __time_t shm_dtime; 68 __time_t shm_ctime; 69 #else 70 unsigned short int __uclibc_unused1; 71 unsigned short int __uclibc_unused2; 72 unsigned short int __uclibc_unused3; 73 unsigned short int __uclibc_unused4; 74 #endif 75 }; 76 77 #ifdef __USE_MISC 78 79 /* ipcs ctl commands */ 80 # define SHM_STAT 13 81 # define SHM_INFO 14 82 83 /* shm_mode upper byte flags */ 84 # define SHM_DEST 01000 /* segment will be destroyed on last detach */ 85 # define SHM_LOCKED 02000 /* segment will not be swapped */ 86 # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ 87 88 struct shminfo 89 { 90 unsigned long int shmmax; 91 unsigned long int shmmin; 92 unsigned long int shmmni; 93 unsigned long int shmseg; 94 unsigned long int shmall; 95 unsigned long int __uclibc_unused1; 96 unsigned long int __uclibc_unused2; 97 unsigned long int __uclibc_unused3; 98 unsigned long int __uclibc_unused4; 99 }; 100 101 struct shm_info 102 { 103 int used_ids; 104 unsigned long int shm_tot; /* total allocated shm */ 105 unsigned long int shm_rss; /* total resident shm */ 106 unsigned long int shm_swp; /* total swapped shm */ 107 unsigned long int swap_attempts; 108 unsigned long int swap_successes; 109 }; 110 111 #endif /* __USE_MISC */ 112