target/linux/generic/files/fs/yaffs2/devextras.h

   1 /*
   2  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
   3  *
   4  * Copyright (C) 2002-2007 Aleph One Ltd.
   5  *   for Toby Churchill Ltd and Brightstar Engineering
   6  *
   7  * Created by Charles Manning <charles@aleph1.co.uk>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU Lesser General Public License version 2.1 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
  14  */
  15
  16 /*
  17  * This file is just holds extra declarations used during development.
  18  * Most of these are from kernel includes placed here so we can use them in
  19  * applications.
  20  *
  21  */
  22
  23 #ifndef __EXTRAS_H__
  24 #define __EXTRAS_H__
  25
  26 #if defined WIN32
  27 #define __inline__ __inline
  28 #define new newHack
  29 #endif
  30
  31 #if !(defined __KERNEL__) || (defined WIN32)
  32
  33 /* User space defines */
  34
  35 typedef unsigned char __u8;
  36 typedef unsigned short __u16;
  37 typedef unsigned __u32;
  38
  39 /*
  40  * Simple doubly linked list implementation.
  41  *
  42  * Some of the internal functions ("__xxx") are useful when
  43  * manipulating whole lists rather than single entries, as
  44  * sometimes we already know the next/prev entries and we can
  45  * generate better code by using them directly rather than
  46  * using the generic single-entry routines.
  47  */
  48
  49 #define prefetch(x) 1
  50
  51 struct list_head {
  52         struct list_head *next, *prev;
  53 };
  54
  55 #define LIST_HEAD_INIT(name) { &(name), &(name) }
  56
  57 #define LIST_HEAD(name) \
  58         struct list_head name = LIST_HEAD_INIT(name)
  59
  60 #define INIT_LIST_HEAD(ptr) do { \
  61         (ptr)->next = (ptr); (ptr)->prev = (ptr); \
  62 } while (0)
  63
  64 /*
  65  * Insert a new entry between two known consecutive entries.
  66  *
  67  * This is only for internal list manipulation where we know
  68  * the prev/next entries already!
  69  */
  70 static __inline__ void __list_add(struct list_head *new,
  71                                   struct list_head *prev,
  72                                   struct list_head *next)
  73 {
  74         next->prev = new;
  75         new->next = next;
  76         new->prev = prev;
  77         prev->next = new;
  78 }
  79
  80 /**
  81  * list_add - add a new entry
  82  * @new: new entry to be added
  83  * @head: list head to add it after
  84  *
  85  * Insert a new entry after the specified head.
  86  * This is good for implementing stacks.
  87  */
  88 static __inline__ void list_add(struct list_head *new, struct list_head *head)
  89 {
  90         __list_add(new, head, head->next);
  91 }
  92
  93 /**
  94  * list_add_tail - add a new entry
  95  * @new: new entry to be added
  96  * @head: list head to add it before
  97  *
  98  * Insert a new entry before the specified head.
  99  * This is useful for implementing queues.
 100  */
 101 static __inline__ void list_add_tail(struct list_head *new,
 102                                      struct list_head *head)
 103 {
 104         __list_add(new, head->prev, head);
 105 }
 106
 107 /*
 108  * Delete a list entry by making the prev/next entries
 109  * point to each other.
 110  *
 111  * This is only for internal list manipulation where we know
 112  * the prev/next entries already!
 113  */
 114 static __inline__ void __list_del(struct list_head *prev,
 115                                   struct list_head *next)
 116 {
 117         next->prev = prev;
 118         prev->next = next;
 119 }
 120
 121 /**
 122  * list_del - deletes entry from list.
 123  * @entry: the element to delete from the list.
 124  * Note: list_empty on entry does not return true after this, the entry is
 125  * in an undefined state.
 126  */
 127 static __inline__ void list_del(struct list_head *entry)
 128 {
 129         __list_del(entry->prev, entry->next);
 130 }
 131
 132 /**
 133  * list_del_init - deletes entry from list and reinitialize it.
 134  * @entry: the element to delete from the list.
 135  */
 136 static __inline__ void list_del_init(struct list_head *entry)
 137 {
 138         __list_del(entry->prev, entry->next);
 139         INIT_LIST_HEAD(entry);
 140 }
 141
 142 /**
 143  * list_empty - tests whether a list is empty
 144  * @head: the list to test.
 145  */
 146 static __inline__ int list_empty(struct list_head *head)
 147 {
 148         return head->next == head;
 149 }
 150
 151 /**
 152  * list_splice - join two lists
 153  * @list: the new list to add.
 154  * @head: the place to add it in the first list.
 155  */
 156 static __inline__ void list_splice(struct list_head *list,
 157                                    struct list_head *head)
 158 {
 159         struct list_head *first = list->next;
 160
 161         if (first != list) {
 162                 struct list_head *last = list->prev;
 163                 struct list_head *at = head->next;
 164
 165                 first->prev = head;
 166                 head->next = first;
 167
 168                 last->next = at;
 169                 at->prev = last;
 170         }
 171 }
 172
 173 /**
 174  * list_entry - get the struct for this entry
 175  * @ptr:        the &struct list_head pointer.
 176  * @type:       the type of the struct this is embedded in.
 177  * @member:     the name of the list_struct within the struct.
 178  */
 179 #define list_entry(ptr, type, member) \
 180         ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
 181
 182 /**
 183  * list_for_each        -       iterate over a list
 184  * @pos:        the &struct list_head to use as a loop counter.
 185  * @head:       the head for your list.
 186  */
 187 #define list_for_each(pos, head) \
 188         for (pos = (head)->next, prefetch(pos->next); pos != (head); \
 189                 pos = pos->next, prefetch(pos->next))
 190
 191 /**
 192  * list_for_each_safe   -       iterate over a list safe against removal
 193  *                              of list entry
 194  * @pos:        the &struct list_head to use as a loop counter.
 195  * @n:          another &struct list_head to use as temporary storage
 196  * @head:       the head for your list.
 197  */
 198 #define list_for_each_safe(pos, n, head) \
 199         for (pos = (head)->next, n = pos->next; pos != (head); \
 200                 pos = n, n = pos->next)
 201
 202 /*
 203  * File types
 204  */
 205 #define DT_UNKNOWN      0
 206 #define DT_FIFO         1
 207 #define DT_CHR          2
 208 #define DT_DIR          4
 209 #define DT_BLK          6
 210 #define DT_REG          8
 211 #define DT_LNK          10
 212 #define DT_SOCK         12
 213 #define DT_WHT          14
 214
 215 #ifndef WIN32
 216 #include <sys/stat.h>
 217 #endif
 218
 219 /*
 220  * Attribute flags.  These should be or-ed together to figure out what
 221  * has been changed!
 222  */
 223 #define ATTR_MODE       1
 224 #define ATTR_UID        2
 225 #define ATTR_GID        4
 226 #define ATTR_SIZE       8
 227 #define ATTR_ATIME      16
 228 #define ATTR_MTIME      32
 229 #define ATTR_CTIME      64
 230 #define ATTR_ATIME_SET  128
 231 #define ATTR_MTIME_SET  256
 232 #define ATTR_FORCE      512     /* Not a change, but a change it */
 233 #define ATTR_ATTR_FLAG  1024
 234
 235 struct iattr {
 236         unsigned int ia_valid;
 237         unsigned ia_mode;
 238         unsigned ia_uid;
 239         unsigned ia_gid;
 240         unsigned ia_size;
 241         unsigned ia_atime;
 242         unsigned ia_mtime;
 243         unsigned ia_ctime;
 244         unsigned int ia_attr_flags;
 245 };
 246
 247 #define KERN_DEBUG
 248
 249 #else
 250
 251 #ifndef WIN32
 252 #include <linux/types.h>
 253 #include <linux/list.h>
 254 #include <linux/fs.h>
 255 #include <linux/stat.h>
 256 #endif
 257
 258 #endif
 259
 260 #if defined WIN32
 261 #undef new
 262 #endif
 263
 264 #endif