diff options
Diffstat (limited to 'target/linux/generic-2.6/files-2.6.26/fs/yaffs2/devextras.h')
| -rw-r--r-- | target/linux/generic-2.6/files-2.6.26/fs/yaffs2/devextras.h | 231 |
1 files changed, 157 insertions, 74 deletions
diff --git a/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/devextras.h b/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/devextras.h index 55c31219d..fcf2690a5 100644 --- a/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/devextras.h +++ b/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/devextras.h @@ -14,117 +14,194 @@ */ /* - * 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. + * 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. * */ #ifndef __EXTRAS_H__ #define __EXTRAS_H__ +#if defined WIN32 +#define __inline__ __inline +#define new newHack +#endif + +#if !(defined __KERNEL__) || (defined WIN32) -#if !(defined __KERNEL__) +/* User space defines */ -/* Definition of types */ typedef unsigned char __u8; typedef unsigned short __u16; typedef unsigned __u32; -#endif - /* - * This is a simple doubly linked list implementation that matches the - * way the Linux kernel doubly linked list implementation works. + * 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. */ -struct ylist_head { - struct ylist_head *next; /* next in chain */ - struct ylist_head *prev; /* previous in chain */ +#define prefetch(x) 1 + +struct list_head { + struct list_head *next, *prev; }; +#define LIST_HEAD_INIT(name) { &(name), &(name) } -/* Initialise a list head to an empty list */ -#define YINIT_LIST_HEAD(p) \ -do { \ - (p)->next = (p);\ - (p)->prev = (p); \ -} while(0) +#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) -/* Add an element to a list */ -static __inline__ void ylist_add(struct ylist_head *newEntry, - struct ylist_head *list) +/* + * 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) { - struct ylist_head *listNext = list->next; - - list->next = newEntry; - newEntry->prev = list; - newEntry->next = listNext; - listNext->prev = newEntry; - + next->prev = new; + new->next = next; + new->prev = prev; + prev->next = new; } - -/* 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) +/** + * 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) { - struct ylist_head *listNext = entry->next; - struct ylist_head *listPrev = entry->prev; - - listNext->prev = listPrev; - listPrev->next = listNext; - + __list_add(new, head, head->next); } -static __inline__ void ylist_del_init(struct ylist_head *entry) +/** + * 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) { - ylist_del(entry); - entry->next = entry->prev = entry; + __list_add(new, head->prev, head); } - -/* Test if the list is empty */ -static __inline__ int ylist_empty(struct ylist_head *entry) +/* + * 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) { - return (entry->next == entry); + next->prev = prev; + prev->next = next; } - -/* 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. +/** + * 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. */ - - -#define ylist_entry(entry, type, member) \ - ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member))) - +static __inline__ void list_del(struct list_head *entry) +{ + __list_del(entry->prev, entry->next); +} -/* ylist_for_each and list_for_each_safe iterate over lists. - * ylist_for_each_safe uses temporary storage to make the list delete safe +/** + * 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); +} -#define ylist_for_each(itervar, list) \ - for (itervar = (list)->next; itervar != (list); itervar = itervar->next ) - -#define ylist_for_each_safe(itervar,saveVar, list) \ - for (itervar = (list)->next, saveVar = (list)->next->next; itervar != (list); \ - itervar = saveVar, saveVar = saveVar->next) - +/** + * 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; +} -#if !(defined __KERNEL__) +/** + * 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; -#ifndef WIN32 -#include <sys/stat.h> -#endif + first->prev = head; + head->next = first; + last->next = at; + at->prev = last; + } +} -#ifdef CONFIG_YAFFS_PROVIDE_DEFS -/* File types */ +/** + * 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 @@ -135,13 +212,13 @@ static __inline__ int ylist_empty(struct ylist_head *entry) #define DT_SOCK 12 #define DT_WHT 14 - #ifndef WIN32 #include <sys/stat.h> #endif /* - * Attribute flags. + * Attribute flags. These should be or-ed together to figure out what + * has been changed! */ #define ATTR_MODE 1 #define ATTR_UID 2 @@ -150,7 +227,10 @@ static __inline__ int ylist_empty(struct ylist_head *entry) #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; @@ -164,18 +244,21 @@ struct iattr { 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 |