devextras.h

把将yaffs 移植到 ucos 系统

/*
 * YAFFS: Yet another FFS. A NAND-flash specific file system. 
 * devextras.h
 *
 * Copyright (C) 2002 Aleph One Ltd.
 *   for Toby Churchill Ltd and Brightstar Engineering
 *
 * Created by Charles Manning <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 2.1 as
 * published by the Free Software Foundation.
 *
 * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
 *
 * This file is just holds extra declarations used during development.
 * Most of these are from kernel includes placed here so we can use them in 
 * applications.
 *
 * $Id: devextras.h,v 1.5 2002/09/27 20:50:50 charles Exp $
 *
 */
 
#ifndef __EXTRAS_H__
#define __EXTRAS_H__


// User space defines
typedef unsigned char   __u8;
typedef unsigned short  __u16;
typedef unsigned        __u32;




/***************************
 Win32 use __inline
 Linuxe use  __inline__
***************************/
#define __inline__ 	__inline



/*
 * Simple doubly linked list implementation.
 *
 * Some of the internal functions ("__xxx") are useful when
 * manipulating whole lists rather than single entries, as
 * sometimes we already know the next/prev entries and we can
 * generate better code by using them directly rather than
 * using the generic single-entry routines.
 */

#define prefetch(x) 1
 
struct list_head {
	struct list_head *next, *prev;
};

#define LIST_HEAD_INIT(name) { &(name), &(name) }

#define LIST_HEAD(name) \
	struct list_head name = LIST_HEAD_INIT(name)

#define INIT_LIST_HEAD(ptr) do { \
	(ptr)->next = (ptr); (ptr)->prev = (ptr); \
} while (0)

/*
 * Insert a new entry between two known consecutive entries.
 *
 * This is only for internal list manipulation where we know
 * the prev/next entries already!
 */
static __inline__ void __list_add(struct list_head * new,
	struct list_head * prev,
	struct list_head * next)
{
	next->prev = new;
	new->next = next;
	new->prev = prev;
	prev->next = new;
}

/**
 * list_add - add a new entry
 * @new: new entry to be added
 * @head: list head to add it after
 *
 * Insert a new entry after the specified head.
 * This is good for implementing stacks.
 */
static __inline__ void list_add(struct list_head *new, struct list_head *head)
{
	__list_add(new, head, head->next);
}

/**
 * list_add_tail - add a new entry
 * @new: new entry to be added
 * @head: list head to add it before
 *
 * Insert a new entry before the specified head.
 * This is useful for implementing queues.
 */
static __inline__ void list_add_tail(struct list_head *new, struct list_head *head)
{
	__list_add(new, head->prev, head);
}

/*
 * Delete a list entry by making the prev/next entries
 * point to each other.
 *
 * This is only for internal list manipulation where we know
 * the prev/next entries already!
 */
static __inline__ void __list_del(struct list_head * prev,
				  struct list_head * next)
{
	next->prev = prev;
	prev->next = next;
}

/**
 * list_del - deletes entry from list.
 * @entry: the element to delete from the list.
 * Note: list_empty on entry does not return true after this, the entry is in an undefined state.
 */
static __inline__ void list_del(struct list_head *entry)
{
	__list_del(entry->prev, entry->next);
}

/**
 * list_del_init - deletes entry from list and reinitialize it.
 * @entry: the element to delete from the list.
 */
static __inline__ void list_del_init(struct list_head *entry)
{
	__list_del(entry->prev, entry->next);
	INIT_LIST_HEAD(entry);
}

/**
 * list_empty - tests whether a list is empty
 * @head: the list to test.
 */
static __inline__ int list_empty(struct list_head *head)
{
	return head->next == head;
}

/**
 * list_splice - join two lists
 * @list: the new list to add.
 * @head: the place to add it in the first list.
 */
static __inline__ void list_splice(struct list_head *list, struct list_head *head)
{
	struct list_head *first = list->next;

	if (first != list) {
		struct list_head *last = list->prev;
		struct list_head *at = head->next;

		first->prev = head;
		head->next = first;

		last->next = at;
		at->prev = last;
	}
}

/**
 * list_entry - get the struct for this entry
 * @ptr:	the &struct list_head pointer.
 * @type:	the type of the struct this is embedded in.
 * @member:	the name of the list_struct within the struct.
 */
#define list_entry(ptr, type, member) \
	((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))

/**
 * list_for_each	-	iterate over a list
 * @pos:	the &struct list_head to use as a loop counter.
 * @head:	the head for your list.
 */
#define list_for_each(pos, head) \
	for (pos = (head)->next, prefetch(pos->next); pos != (head); \
        	pos = pos->next, prefetch(pos->next))

/**
 * list_for_each_safe	-	iterate over a list safe against removal of list entry
 * @pos:	the &struct list_head to use as a loop counter.
 * @n:		another &struct list_head to use as temporary storage
 * @head:	the head for your list.
 */
#define list_for_each_safe(pos, n, head) \
		for (pos = (head)->next, n = pos->next; pos != (head); \
		pos = n, n = pos->next)




/*
 * File types
 */
#define DT_UNKNOWN	0
#define DT_FIFO		1
#define DT_CHR		2
#define DT_DIR		4
#define DT_BLK		6
#define DT_REG		8
#define DT_LNK		10
#define DT_SOCK		12
#define DT_WHT		14



/**********************************************
  #include <sys/stat.h>
  fellowing code take place of <sys/stat.h>
***********************************************/

#define __stat_mode_DIR    (1<<0)
#define __stat_mode_CHR    (1<<1)
#define __stat_mode_BLK    (1<<2)
#define __stat_mode_REG    (1<<3)
#define __stat_mode_FIFO   (1<<4)
#define __stat_mode_MQ     (1<<5)
#define __stat_mode_SEM    (1<<6)
#define __stat_mode_SHM    (1<<7)
#define __stat_mode_LNK    (1<<8)
#define __stat_mode_SOCK   (1<<9)

#define S_IFDIR          (__stat_mode_DIR)
#define S_IFCHR          (__stat_mode_CHR)
#define S_IFBLK          (__stat_mode_BLK)
#define S_IFREG          (__stat_mode_REG)
#define S_IFIFO          (__stat_mode_FIFO)
#define S_IFLNK          (__stat_mode_LNK)
#define S_IFSOCK         (__stat_mode_SOCK)
#define S_IFMT           (S_IFDIR|S_IFCHR|S_IFBLK|S_IFREG|S_IFIFO|S_IFLNK|S_IFSOCK)

#define S_ISDIR(__mode)  ((__mode) & __stat_mode_DIR )
#define S_ISCHR(__mode)  ((__mode) & __stat_mode_CHR )
#define S_ISBLK(__mode)  ((__mode) & __stat_mode_BLK )
#define S_ISREG(__mode)  ((__mode) & __stat_mode_REG )
#define S_ISFIFO(__mode) ((__mode) & __stat_mode_FIFO )

#define S_ISLNK(__mode)  ((__mode) & __stat_mode_LNK )
#define S_ISSOCK(__mode)  ((__mode) & __stat_mode_SOCK )

#define S_TYPEISMQ(__buf)   ((__buf)->st_mode & __stat_mode_MQ )
#define S_TYPEISSEM(__buf)  ((__buf)->st_mode & __stat_mode_SEM )
#define S_TYPEISSHM(__buf)  ((__buf)->st_mode & __stat_mode_SHM )


#define S_IRUSR  (1<<16)
#define S_IWUSR  (1<<17)
#define S_IXUSR  (1<<18)
#define S_IRWXU  (S_IRUSR|S_IWUSR|S_IXUSR)

#define S_IRGRP  (1<<19)
#define S_IWGRP  (1<<20)
#define S_IXGRP  (1<<21)
#define S_IRWXG  (S_IRGRP|S_IWGRP|S_IXGRP)

#define S_IROTH  (1<<22)
#define S_IWOTH  (1<<23)
#define S_IXOTH  (1<<24)
#define S_IRWXO  (S_IROTH|S_IWOTH|S_IXOTH)

#define S_ISUID  (1<<25)
#define S_ISGID  (1<<26)







/*
 * Attribute flags.  These should be or-ed together to figure out what
 * has been changed!
 */
#define ATTR_MODE	1
#define ATTR_UID	2
#define ATTR_GID	4
#define ATTR_SIZE	8
#define ATTR_ATIME	16
#define ATTR_MTIME	32
#define ATTR_CTIME	64
#define ATTR_ATIME_SET	128
#define ATTR_MTIME_SET	256
#define ATTR_FORCE	512	/* Not a change, but a change it */
#define ATTR_ATTR_FLAG	1024


struct iattr {
	unsigned int	ia_valid;
	unsigned		ia_mode;
	unsigned		ia_uid;
	unsigned		ia_gid;
	unsigned		ia_size;
	unsigned		ia_atime;
	unsigned	ia_mtime;
	unsigned	ia_ctime;
	unsigned int	ia_attr_flags;
};

#define KERN_DEBUG


#endif    // _EXTRAS_H