diff options
Diffstat (limited to 'uclibc-crosstools-gcc-4.4.2-1/usr/include/linux/shm.h')
| -rw-r--r-- | uclibc-crosstools-gcc-4.4.2-1/usr/include/linux/shm.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/uclibc-crosstools-gcc-4.4.2-1/usr/include/linux/shm.h b/uclibc-crosstools-gcc-4.4.2-1/usr/include/linux/shm.h new file mode 100644 index 0000000..c99cef0 --- /dev/null +++ b/uclibc-crosstools-gcc-4.4.2-1/usr/include/linux/shm.h @@ -0,0 +1,75 @@ +#ifndef _LINUX_SHM_H_ +#define _LINUX_SHM_H_ + +#include <linux/ipc.h> +#include <linux/errno.h> +#include <unistd.h> + +/* + * SHMMAX, SHMMNI and SHMALL are upper limits are defaults which can + * be increased by sysctl + */ + +#define SHMMAX 0x2000000 /* max shared seg size (bytes) */ +#define SHMMIN 1 /* min shared seg size (bytes) */ +#define SHMMNI 4096 /* max num of segs system wide */ +#define SHMALL (SHMMAX/getpagesize()*(SHMMNI/16)) +#define SHMSEG SHMMNI /* max shared segs per process */ + + +/* Obsolete, used only for backwards compatibility and libc5 compiles */ +struct shmid_ds { + struct ipc_perm shm_perm; /* operation perms */ + int shm_segsz; /* size of segment (bytes) */ + __kernel_time_t shm_atime; /* last attach time */ + __kernel_time_t shm_dtime; /* last detach time */ + __kernel_time_t shm_ctime; /* last change time */ + __kernel_ipc_pid_t shm_cpid; /* pid of creator */ + __kernel_ipc_pid_t shm_lpid; /* pid of last operator */ + unsigned short shm_nattch; /* no. of current attaches */ + unsigned short shm_unused; /* compatibility */ + void *shm_unused2; /* ditto - used by DIPC */ + void *shm_unused3; /* unused */ +}; + +/* Include the definition of shmid64_ds and shminfo64 */ +#include <asm/shmbuf.h> + +/* permission flag for shmget */ +#define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ +#define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */ + +/* mode for attach */ +#define SHM_RDONLY 010000 /* read-only access */ +#define SHM_RND 020000 /* round attach address to SHMLBA boundary */ +#define SHM_REMAP 040000 /* take-over region on attach */ +#define SHM_EXEC 0100000 /* execution access */ + +/* super user shmctl commands */ +#define SHM_LOCK 11 +#define SHM_UNLOCK 12 + +/* ipcs ctl commands */ +#define SHM_STAT 13 +#define SHM_INFO 14 + +/* Obsolete, used only for backwards compatibility */ +struct shminfo { + int shmmax; + int shmmin; + int shmmni; + int shmseg; + int shmall; +}; + +struct shm_info { + int used_ids; + unsigned long shm_tot; /* total allocated shm */ + unsigned long shm_rss; /* total resident shm */ + unsigned long shm_swp; /* total swapped shm */ + unsigned long swap_attempts; + unsigned long swap_successes; +}; + + +#endif /* _LINUX_SHM_H_ */ |