libc/sysdeps/linux/sparc/bits/shm.h

   1 /* Copyright (C) 1995, 1996, 1997, 2000, 2002, 2004
   2    Free Software Foundation, Inc.
   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 __BEGIN_DECLS
  38
  39 /* Segment low boundary address multiple.  */
  40 #define SHMLBA          (__getpagesize ())
  41 extern int __getpagesize (void) __THROW __attribute__ ((__const__));
  42
  43
  44 /* Type to count number of attaches.  */
  45 typedef unsigned long int shmatt_t;
  46
  47 /* Data structure describing a set of semaphores.  */
  48 struct shmid_ds
  49   {
  50     struct ipc_perm shm_perm;           /* operation permission struct */
  51     unsigned int __pad1;
  52     __time_t shm_atime;                 /* time of last shmat() */
  53     unsigned int __pad2;
  54     __time_t shm_dtime;                 /* time of last shmdt() */
  55     unsigned int __pad3;
  56     __time_t shm_ctime;                 /* time of last change by shmctl() */
  57     size_t shm_segsz;                   /* size of segment in bytes */
  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     unsigned long int __uclibc_unused1;
  62     unsigned long int __uclibc_unused2;
  63   };
  64
  65 #ifdef __USE_MISC
  66
  67 /* ipcs ctl commands */
  68 # define SHM_STAT       13
  69 # define SHM_INFO       14
  70
  71 /* shm_mode upper byte flags */
  72 # define SHM_DEST       01000   /* segment will be destroyed on last detach */
  73 # define SHM_LOCKED     02000   /* segment will not be swapped */
  74 # define SHM_HUGETLB    04000   /* segment is mapped via hugetlb */
  75 # define SHM_NORESERVE  010000  /* don't check for reservations */
  76
  77 struct  shminfo
  78   {
  79     unsigned long shmmax;
  80     unsigned long shmmin;
  81     unsigned long shmmni;
  82     unsigned long shmseg;
  83     unsigned long shmall;
  84     unsigned long __uclibc_unused1;
  85     unsigned long __uclibc_unused2;
  86     unsigned long __uclibc_unused3;
  87     unsigned long __uclibc_unused4;
  88   };
  89
  90 struct shm_info
  91   {
  92     int used_ids;
  93     unsigned long int shm_tot;  /* total allocated shm */
  94     unsigned long int shm_rss;  /* total resident shm */
  95     unsigned long int shm_swp;  /* total swapped shm */
  96     unsigned long int swap_attempts;
  97     unsigned long int swap_successes;
  98   };
  99
 100 #endif /* __USE_MISC */
 101
 102 __END_DECLS