libc/sysdeps/linux/riscv64/bits/shm.h

   1 /*
   2  * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB
   3  * in this tarball.
   4  */
   5
   6 #ifndef _SYS_SHM_H
   7 # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
   8 #endif
   9
  10 #include <bits/types.h>
  11
  12 /* Permission flag for shmget.  */
  13 #define SHM_R           0400            /* or S_IRUGO from <linux/stat.h> */
  14 #define SHM_W           0200            /* or S_IWUGO from <linux/stat.h> */
  15
  16 /* Flags for `shmat'.  */
  17 #define SHM_RDONLY      010000          /* attach read-only else read-write */
  18 #define SHM_RND         020000          /* round attach address to SHMLBA */
  19 #define SHM_REMAP       040000          /* take-over region on attach */
  20
  21 /* Commands for `shmctl'.  */
  22 #define SHM_LOCK        11              /* lock segment (root only) */
  23 #define SHM_UNLOCK      12              /* unlock segment (root only) */
  24
  25 __BEGIN_DECLS
  26
  27 /* Segment low boundary address multiple.  */
  28 #define SHMLBA          (__getpagesize () << 2)
  29 extern int __getpagesize (void) __THROW __attribute__ ((__const__));
  30
  31
  32 /* Type to count number of attaches.  */
  33 typedef unsigned long int shmatt_t;
  34
  35 /* Data structure describing a set of semaphores.  */
  36 struct shmid_ds
  37   {
  38     struct ipc_perm shm_perm;           /* operation permission struct */
  39     size_t shm_segsz;                   /* size of segment in bytes */
  40     __time_t shm_atime;                 /* time of last shmat() */
  41     unsigned long int __uclibc_unused1;
  42     __time_t shm_dtime;                 /* time of last shmdt() */
  43     unsigned long int __uclibc_unused2;
  44     __time_t shm_ctime;                 /* time of last change by shmctl() */
  45     unsigned long int __uclibc_unused3;
  46     __pid_t shm_cpid;                   /* pid of creator */
  47     __pid_t shm_lpid;                   /* pid of last shmop */
  48     shmatt_t shm_nattch;                /* number of current attaches */
  49     unsigned long int __uclibc_unused4;
  50     unsigned long int __uclibc_unused5;
  51   };
  52
  53 #ifdef __USE_MISC
  54
  55 /* ipcs ctl commands */
  56 # define SHM_STAT       13
  57 # define SHM_INFO       14
  58
  59 /* shm_mode upper byte flags */
  60 # define SHM_DEST       01000   /* segment will be destroyed on last detach */
  61 # define SHM_LOCKED     02000   /* segment will not be swapped */
  62 # define SHM_HUGETLB    04000   /* segment is mapped via hugetlb */
  63 # define SHM_NORESERVE  010000  /* don't check for reservations */
  64
  65 struct  shminfo
  66   {
  67     unsigned long int shmmax;
  68     unsigned long int shmmin;
  69     unsigned long int shmmni;
  70     unsigned long int shmseg;
  71     unsigned long int shmall;
  72     unsigned long int __uclibc_unused1;
  73     unsigned long int __uclibc_unused2;
  74     unsigned long int __uclibc_unused3;
  75     unsigned long int __uclibc_unused4;
  76   };
  77
  78 struct shm_info
  79   {
  80     int used_ids;
  81     unsigned long int shm_tot;  /* total allocated shm */
  82     unsigned long int shm_rss;  /* total resident shm */
  83     unsigned long int shm_swp;  /* total swapped shm */
  84     unsigned long int swap_attempts;
  85     unsigned long int swap_successes;
  86   };
  87
  88 #endif /* __USE_MISC */
  89
  90 __END_DECLS