sysdeps/unix/sysv/linux/hppa/bits/shm.h

   1 /* Copyright (C) 1995-2015 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 #include <bits/wordsize.h>
  24
  25 /* Permission flag for shmget.  */
  26 #define SHM_R           0400            /* or S_IRUGO from <linux/stat.h> */
  27 #define SHM_W           0200            /* or S_IWUGO from <linux/stat.h> */
  28
  29 /* Flags for `shmat'.  */
  30 #define SHM_RDONLY      010000          /* attach read-only else read-write */
  31 #define SHM_RND         020000          /* round attach address to SHMLBA */
  32 #define SHM_REMAP       040000          /* take-over region on attach */
  33
  34 /* Commands for `shmctl'.  */
  35 #define SHM_LOCK        11              /* lock segment (root only) */
  36 #define SHM_UNLOCK      12              /* unlock segment (root only) */
  37
  38 /* Segment low boundary address multiple.  */
  39 #define SHMLBA 0x00400000               /* address needs to be 4 Mb aligned */
  40
  41 /* Type to count number of attaches.  */
  42 typedef unsigned long int shmatt_t;
  43
  44 /* Data structure describing a shared memory segment.  */
  45 struct shmid_ds
  46   {
  47     struct ipc_perm shm_perm;           /* operation permission struct */
  48 #if __WORDSIZE == 32
  49     unsigned int __pad1;
  50 #endif
  51     __time_t shm_atime;                 /* time of last shmat() */
  52 #if __WORDSIZE == 32
  53     unsigned int __pad2;
  54 #endif
  55     __time_t shm_dtime;                 /* time of last shmdt() */
  56 #if __WORDSIZE == 32
  57     unsigned int __pad3;
  58 #endif
  59     __time_t shm_ctime;                 /* time of last change by shmctl() */
  60 #if __WORDSIZE == 32
  61     unsigned int __pad4;
  62 #endif
  63     size_t shm_segsz;                   /* size of segment in bytes */
  64     __pid_t shm_cpid;                   /* pid of creator */
  65     __pid_t shm_lpid;                   /* pid of last shmop */
  66     shmatt_t shm_nattch;                /* number of current attaches */
  67     unsigned long int __glibc_reserved1;
  68     unsigned long int __glibc_reserved2;
  69   };
  70
  71 #ifdef __USE_MISC
  72
  73 /* ipcs ctl commands */
  74 # define SHM_STAT       13
  75 # define SHM_INFO       14
  76
  77 /* shm_mode upper byte flags */
  78 # define SHM_DEST       01000   /* segment will be destroyed on last detach */
  79 # define SHM_LOCKED     02000   /* segment will not be swapped */
  80 # define SHM_HUGETLB    04000   /* segment is mapped via hugetlb */
  81 # define SHM_NORESERVE  010000  /* don't check for reservations */
  82
  83 struct  shminfo
  84   {
  85     unsigned long shmmax;
  86     unsigned long shmmin;
  87     unsigned long shmmni;
  88     unsigned long shmseg;
  89     unsigned long shmall;
  90     unsigned long __glibc_reserved1;
  91     unsigned long __glibc_reserved2;
  92     unsigned long __glibc_reserved3;
  93     unsigned long __glibc_reserved4;
  94   };
  95
  96 struct shm_info
  97   {
  98     int used_ids;
  99     unsigned long int shm_tot;  /* total allocated shm */
 100     unsigned long int shm_rss;  /* total resident shm */
 101     unsigned long int shm_swp;  /* total swapped shm */
 102     unsigned long int swap_attempts;
 103     unsigned long int swap_successes;
 104   };
 105
 106 #endif /* __USE_MISC */