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

   1 /* Copyright (C) 1995-2014 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 #define SHM_EXEC        0100000         /* execution access */
  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 __BEGIN_DECLS
  39
  40 /* Segment low boundary address multiple.  */
  41 #define SHMLBA          (__getpagesize ())
  42 extern int __getpagesize (void) __THROW __attribute__ ((__const__));
  43
  44
  45 /* Type to count number of attaches.  */
  46 typedef unsigned long int shmatt_t;
  47
  48 /* Data structure describing a shared memory segment.  */
  49 struct shmid_ds
  50   {
  51     struct ipc_perm shm_perm;          /* operation permission struct */
  52 #if __WORDSIZE == 32
  53     unsigned int __glibc_reserved1;
  54 #endif
  55     __time_t shm_atime;                        /* time of last shmat() */
  56 #if __WORDSIZE == 32
  57     unsigned int __glibc_reserved2;
  58 #endif
  59     __time_t shm_dtime;                        /* time of last shmdt() */
  60 #if __WORDSIZE == 32
  61     unsigned int __glibc_reserved3;
  62 #endif
  63     __time_t shm_ctime;                 /* time of last change by shmctl() */
  64 #if __WORDSIZE == 32
  65     unsigned int __glibc_reserved4;
  66 #endif
  67     size_t shm_segsz;                  /* size of segment in bytes */
  68     __pid_t shm_cpid;                  /* pid of creator */
  69     __pid_t shm_lpid;                  /* pid of last shmop */
  70     shmatt_t shm_nattch;               /* number of current attaches */
  71     unsigned long __glibc_reserved5;
  72     unsigned long __glibc_reserved6;
  73   };
  74
  75 #ifdef __USE_MISC
  76
  77 /* ipcs ctl commands */
  78 # define SHM_STAT      13
  79 # define SHM_INFO      14
  80
  81 /* shm_mode upper byte flags */
  82 # define SHM_DEST      01000    /* segment will be destroyed on last detach */
  83 # define SHM_LOCKED    02000    /* segment will not be swapped */
  84 # define SHM_HUGETLB   04000    /* segment is mapped via hugetlb */
  85 # define SHM_NORESERVE 010000   /* don't check for reservations */
  86
  87 struct shminfo
  88   {
  89     unsigned long int shmmax;
  90     unsigned long int shmmin;
  91     unsigned long int shmmni;
  92     unsigned long int shmseg;
  93     unsigned long int shmall;
  94     unsigned long int __glibc_reserved1;
  95     unsigned long int __glibc_reserved2;
  96     unsigned long int __glibc_reserved3;
  97     unsigned long int __glibc_reserved4;
  98   };
  99
 100 struct shm_info
 101   {
 102     int used_ids;
 103     unsigned long int shm_tot; /* total allocated shm */
 104     unsigned long int shm_rss; /* total resident shm */
 105     unsigned long int shm_swp; /* total swapped shm */
 106     unsigned long int swap_attempts;
 107     unsigned long int swap_successes;
 108   };
 109
 110 #endif /* __USE_MISC */
 111
 112 __END_DECLS