release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/sysroot/usr/include/linux/shm.h

   1 #ifndef _LINUX_SHM_H_
   2 #define _LINUX_SHM_H_
   3
   4 #include <linux/ipc.h>
   5 #include <linux/errno.h>
   6 #include <unistd.h>
   7
   8 /*
   9  * SHMMAX, SHMMNI and SHMALL are upper limits are defaults which can
  10  * be increased by sysctl
  11  */
  12
  13 #define SHMMAX 0x2000000                 /* max shared seg size (bytes) */
  14 #define SHMMIN 1                         /* min shared seg size (bytes) */
  15 #define SHMMNI 4096                      /* max num of segs system wide */
  16 #define SHMALL (SHMMAX/getpagesize()*(SHMMNI/16))
  17 #define SHMSEG SHMMNI                    /* max shared segs per process */
  18
  19
  20 /* Obsolete, used only for backwards compatibility and libc5 compiles */
  21 struct shmid_ds {
  22         struct ipc_perm         shm_perm;       /* operation perms */
  23         int                     shm_segsz;      /* size of segment (bytes) */
  24         __kernel_time_t         shm_atime;      /* last attach time */
  25         __kernel_time_t         shm_dtime;      /* last detach time */
  26         __kernel_time_t         shm_ctime;      /* last change time */
  27         __kernel_ipc_pid_t      shm_cpid;       /* pid of creator */
  28         __kernel_ipc_pid_t      shm_lpid;       /* pid of last operator */
  29         unsigned short          shm_nattch;     /* no. of current attaches */
  30         unsigned short          shm_unused;     /* compatibility */
  31         void                    *shm_unused2;   /* ditto - used by DIPC */
  32         void                    *shm_unused3;   /* unused */
  33 };
  34
  35 /* Include the definition of shmid64_ds and shminfo64 */
  36 #include <asm/shmbuf.h>
  37
  38 /* permission flag for shmget */
  39 #define SHM_R           0400    /* or S_IRUGO from <linux/stat.h> */
  40 #define SHM_W           0200    /* or S_IWUGO from <linux/stat.h> */
  41
  42 /* mode for attach */
  43 #define SHM_RDONLY      010000  /* read-only access */
  44 #define SHM_RND         020000  /* round attach address to SHMLBA boundary */
  45 #define SHM_REMAP       040000  /* take-over region on attach */
  46 #define SHM_EXEC        0100000 /* execution access */
  47
  48 /* super user shmctl commands */
  49 #define SHM_LOCK        11
  50 #define SHM_UNLOCK      12
  51
  52 /* ipcs ctl commands */
  53 #define SHM_STAT        13
  54 #define SHM_INFO        14
  55
  56 /* Obsolete, used only for backwards compatibility */
  57 struct  shminfo {
  58         int shmmax;
  59         int shmmin;
  60         int shmmni;
  61         int shmseg;
  62         int shmall;
  63 };
  64
  65 struct shm_info {
  66         int used_ids;
  67         unsigned long shm_tot;  /* total allocated shm */
  68         unsigned long shm_rss;  /* total resident shm */
  69         unsigned long shm_swp;  /* total swapped shm */
  70         unsigned long swap_attempts;
  71         unsigned long swap_successes;
  72 };
  73
  74
  75 #endif /* _LINUX_SHM_H_ */