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

   1 /* Copyright (C) 1995, 1996, 1997, 2000 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef _SYS_SHM_H
  20 # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
  21 #endif
  22
  23 #include <bits/types.h>
  24 #include <bits/wordsize.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
  35 /* Commands for `shmctl'.  */
  36 #define SHM_LOCK        11              /* lock segment (root only) */
  37 #define SHM_UNLOCK      12              /* unlock segment (root only) */
  38
  39
  40 /* Type to count number of attaches.  */
  41 typedef unsigned long int shmatt_t;
  42
  43 /* Data structure describing a set of semaphores.  */
  44 struct shmid_ds
  45   {
  46     struct ipc_perm shm_perm;           /* operation permission struct */
  47 #if __WORDSIZE == 32
  48     unsigned int __pad1;
  49 #endif
  50     __time_t shm_atime;                 /* time of last shmat() */
  51 #if __WORDSIZE == 32
  52     unsigned int __pad2;
  53 #endif
  54     __time_t shm_dtime;                 /* time of last shmdt() */
  55 #if __WORDSIZE == 32
  56     unsigned int __pad3;
  57 #endif
  58     __time_t shm_ctime;                 /* time of last change by shmctl() */
  59 #if __WORDSIZE == 32
  60     unsigned int __pad4;
  61 #endif
  62     size_t shm_segsz;                   /* size of segment in bytes */
  63     __pid_t shm_cpid;                   /* pid of creator */
  64     __pid_t shm_lpid;                   /* pid of last shmop */
  65     shmatt_t shm_nattch;                /* number of current attaches */
  66     unsigned long int __unused1;
  67     unsigned long int __unused2;
  68   };
  69
  70 #ifdef __USE_MISC
  71
  72 /* ipcs ctl commands */
  73 # define SHM_STAT       13
  74 # define SHM_INFO       14
  75
  76 /* shm_mode upper byte flags */
  77 # define SHM_DEST       01000   /* segment will be destroyed on last detach */
  78 # define SHM_LOCKED     02000   /* segment will not be swapped */
  79
  80 struct  shminfo
  81   {
  82     unsigned long shmmax;
  83     unsigned long shmmin;
  84     unsigned long shmmni;
  85     unsigned long shmseg;
  86     unsigned long shmall;
  87     unsigned long __unused1;
  88     unsigned long __unused2;
  89     unsigned long __unused3;
  90     unsigned long __unused4;
  91   };
  92
  93 struct shm_info
  94   {
  95     int used_ids;
  96     unsigned long int shm_tot;  /* total allocated shm */
  97     unsigned long int shm_rss;  /* total resident shm */
  98     unsigned long int shm_swp;  /* total swapped shm */
  99     unsigned long int swap_attempts;
 100     unsigned long int swap_successes;
 101   };
 102
 103 #endif /* __USE_MISC */