/*
- * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
* Copyright (C) 2002-2007 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*/
/*
- * 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.
+ * This file is just holds extra declarations of macros that would normally
+ * be providesd in the Linux kernel. These macros have been written from
+ * scratch but are functionally equivalent to the Linux ones.
*
*/
#ifndef __EXTRAS_H__
#define __EXTRAS_H__
-#if defined WIN32
-#define __inline__ __inline
-#define new newHack
-#endif
-
-#if !(defined __KERNEL__) || (defined WIN32)
-/* User space defines */
+#if !(defined __KERNEL__)
+/* Definition of types */
typedef unsigned char __u8;
typedef unsigned short __u16;
typedef unsigned __u32;
+#endif
+
/*
- * 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.
+ * This is a simple doubly linked list implementation that matches the
+ * way the Linux kernel doubly linked list implementation works.
*/
-#define prefetch(x) 1
-
-struct list_head {
- struct list_head *next, *prev;
+struct ylist_head {
+ struct ylist_head *next; /* next in chain */
+ struct ylist_head *prev; /* previous in chain */
};
-#define LIST_HEAD_INIT(name) { &(name), &(name) }
-#define LIST_HEAD(name) \
- struct list_head name = LIST_HEAD_INIT(name)
+/* Initialise a static list */
+#define YLIST_HEAD(name) \
+struct ylist_head name = { &(name),&(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)
+/* Initialise a list head to an empty list */
+#define YINIT_LIST_HEAD(p) \
+do { \
+ (p)->next = (p);\
+ (p)->prev = (p); \
+} while(0)
+
+
+/* Add an element to a list */
+static __inline__ void ylist_add(struct ylist_head *newEntry,
+ struct ylist_head *list)
{
- __list_add(new, head, head->next);
+ struct ylist_head *listNext = list->next;
+
+ list->next = newEntry;
+ newEntry->prev = list;
+ newEntry->next = listNext;
+ listNext->prev = newEntry;
+
}
-/**
- * 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)
+static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
+ struct ylist_head *list)
{
- __list_add(new, head->prev, head);
+ struct ylist_head *listPrev = list->prev;
+
+ list->prev = newEntry;
+ newEntry->next = list;
+ newEntry->prev = listPrev;
+ listPrev->next = newEntry;
+
}
-/*
- * 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)
+
+/* Take an element out of its current list, with or without
+ * reinitialising the links.of the entry*/
+static __inline__ void ylist_del(struct ylist_head *entry)
{
- next->prev = prev;
- prev->next = next;
+ struct ylist_head *listNext = entry->next;
+ struct ylist_head *listPrev = entry->prev;
+
+ listNext->prev = listPrev;
+ listPrev->next = listNext;
+
}
-/**
- * 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)
+static __inline__ void ylist_del_init(struct ylist_head *entry)
{
- __list_del(entry->prev, entry->next);
+ ylist_del(entry);
+ entry->next = entry->prev = entry;
}
-/**
- * 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)
+
+/* Test if the list is empty */
+static __inline__ int ylist_empty(struct ylist_head *entry)
{
- __list_del(entry->prev, entry->next);
- INIT_LIST_HEAD(entry);
+ return (entry->next == entry);
}
-/**
- * list_empty - tests whether a list is empty
- * @head: the list to test.
+
+/* ylist_entry takes a pointer to a list entry and offsets it to that
+ * we can find a pointer to the object it is embedded in.
*/
-static __inline__ int list_empty(struct list_head *head)
-{
- return head->next == head;
-}
+
+
+#define ylist_entry(entry, type, member) \
+ ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
+
-/**
- * list_splice - join two lists
- * @list: the new list to add.
- * @head: the place to add it in the first list.
+/* ylist_for_each and list_for_each_safe iterate over lists.
+ * ylist_for_each_safe uses temporary storage to make the list delete safe
*/
-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;
+#define ylist_for_each(itervar, list) \
+ for (itervar = (list)->next; itervar != (list); itervar = itervar->next )
- first->prev = head;
- head->next = first;
+#define ylist_for_each_safe(itervar,saveVar, list) \
+ for (itervar = (list)->next, saveVar = (list)->next->next; itervar != (list); \
+ itervar = saveVar, saveVar = saveVar->next)
- 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)))
+#if !(defined __KERNEL__)
-/**
- * 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
+#ifndef WIN32
+#include <sys/stat.h>
+#endif
+
+
+#ifdef CONFIG_YAFFS_PROVIDE_DEFS
+/* 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
+#define DT_REG 8
+#define DT_LNK 10
+#define DT_SOCK 12
+#define DT_WHT 14
+
#ifndef WIN32
#include <sys/stat.h>
* 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_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_atime;
unsigned ia_mtime;
unsigned ia_ctime;
- unsigned int ia_attr_flags;
+ unsigned int ia_attr_flags;
};
+#endif
+
+
#define KERN_DEBUG
#else
-#ifndef WIN32
#include <linux/types.h>
-#include <linux/list.h>
#include <linux/fs.h>
#include <linux/stat.h>
-#endif
#endif
-#if defined WIN32
-#undef new
-#endif
#endif
projects / yaffs2.git / blobdiff