#ifndef _LINUX_SHM_H_
#define _LINUX_SHM_H_

#include <linux/ipc.h>
#include <linux/errno.h>
#ifdef __KERNEL__
#include <asm/page.h>
#else
#include <unistd.h>
#endif


#define SHMMAX 0x2000000		 
#define SHMMIN 1			 
#define SHMMNI 4096			 
#ifdef __KERNEL__
#define SHMALL (SHMMAX/PAGE_SIZE*(SHMMNI/16)) 
#else
#define SHMALL (SHMMAX/getpagesize()*(SHMMNI/16))
#endif
#define SHMSEG SHMMNI			 

#ifdef __KERNEL__
#include <asm/shmparam.h>
#endif

struct shmid_ds {
	struct ipc_perm		shm_perm;	
	int			shm_segsz;	
	__kernel_time_t		shm_atime;	
	__kernel_time_t		shm_dtime;	
	__kernel_time_t		shm_ctime;	
	__kernel_ipc_pid_t	shm_cpid;	
	__kernel_ipc_pid_t	shm_lpid;	
	unsigned short		shm_nattch;	
	unsigned short 		shm_unused;	
	void 			*shm_unused2;	
	void			*shm_unused3;	
};

#include <asm/shmbuf.h>

#define SHM_R		0400	
#define SHM_W		0200	

#define	SHM_RDONLY	010000	
#define	SHM_RND		020000	
#define	SHM_REMAP	040000	
#define	SHM_EXEC	0100000	

#define SHM_LOCK 	11
#define SHM_UNLOCK 	12

#define SHM_STAT 	13
#define SHM_INFO 	14

struct	shminfo {
	int shmmax;
	int shmmin;
	int shmmni;
	int shmseg;
	int shmall;
};

struct shm_info {
	int used_ids;
	unsigned long shm_tot;	
	unsigned long shm_rss;	
	unsigned long shm_swp;	
	unsigned long swap_attempts;
	unsigned long swap_successes;
};

#ifdef __KERNEL__
struct shmid_kernel 
{	
	struct kern_ipc_perm	shm_perm;
	struct file *		shm_file;
	unsigned long		shm_nattch;
	unsigned long		shm_segsz;
	time_t			shm_atim;
	time_t			shm_dtim;
	time_t			shm_ctim;
	pid_t			shm_cprid;
	pid_t			shm_lprid;
	struct user_struct	*mlock_user;

	
	struct task_struct	*shm_creator;
};

#define	SHM_DEST	01000	
#define SHM_LOCKED      02000   
#define SHM_HUGETLB     04000   
#define SHM_NORESERVE   010000  

#ifdef CONFIG_SYSVIPC
long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr);
extern int is_file_shm_hugepages(struct file *file);
extern void exit_shm(struct task_struct *task);
#else
static inline long do_shmat(int shmid, char __user *shmaddr,
				int shmflg, unsigned long *addr)
{
	return -ENOSYS;
}
static inline int is_file_shm_hugepages(struct file *file)
{
	return 0;
}
static inline void exit_shm(struct task_struct *task)
{
}
#endif

#endif 

#endif