Tweaks to YaffsTuning doc.

[yaffs2.git] / devextras.h

diff --git a/devextras.h b/devextras.h
index 2ba88a2b9c449f8e4def6a73d55dd83297937153..7df46dc2921cb8c686ad253360ce18b4967a1f18 100644 (file)
--- a/devextras.h
+++ b/devextras.h
@@ -23,99 +23,126 @@
 #ifndef __EXTRAS_H__
 #define __EXTRAS_H__
 
-#if defined WIN32
-#define __inline__ __inline
-#define new newHack
-#endif
 
-#if !(defined __KERNEL__) || (defined WIN32)
+#if !(defined __KERNEL__)
 
 /* 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 
+ * This is a simple doubly linked list implementation that matches the
  * way the Linux kernel doubly linked list implementation works.
  */
 
-struct list_head {
-       struct list_head *next; /* next in chain */
-       struct list_head *prev; /* previous in chain */
+struct ylist_head {
+       struct ylist_head *next; /* next in chain */
+       struct ylist_head *prev; /* previous in chain */
 };
 
 
+/* Initialise a static list */
+#define YLIST_HEAD(name) \
+struct ylist_head name = { &(name), &(name)}
+
+
+
 /* Initialise a list head to an empty list */
-#define INIT_LIST_HEAD(p) \
+#define YINIT_LIST_HEAD(p) \
 do { \
- (p)->next = (p);\
- (p)->prev = (p); \
-} while(0)
+       (p)->next = (p);\
+       (p)->prev = (p); \
+} while (0)
 
 
 /* Add an element to a list */
-static __inline__ void list_add(struct list_head *newEntry, 
-                               struct list_head *list)
+static __inline__ void ylist_add(struct ylist_head *newEntry,
+                               struct ylist_head *list)
 {
-       struct list_head *listNext = list->next;
-       
+       struct ylist_head *listNext = list->next;
+
        list->next = newEntry;
        newEntry->prev = list;
        newEntry->next = listNext;
        listNext->prev = newEntry;
-       
+
+}
+
+static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
+                                struct ylist_head *list)
+{
+       struct ylist_head *listPrev = list->prev;
+
+       list->prev = newEntry;
+       newEntry->next = list;
+       newEntry->prev = listPrev;
+       listPrev->next = newEntry;
+
 }
 
 
 /* Take an element out of its current list, with or without
  * reinitialising the links.of the entry*/
-static __inline__ void list_del(struct list_head *entry)
+static __inline__ void ylist_del(struct ylist_head *entry)
 {
-       struct list_head *listNext = entry->next;
-       struct list_head *listPrev = entry->prev;
-       
+       struct ylist_head *listNext = entry->next;
+       struct ylist_head *listPrev = entry->prev;
+
        listNext->prev = listPrev;
        listPrev->next = listNext;
-       
+
 }
 
-static __inline__ void list_del_init(struct list_head *entry)
+static __inline__ void ylist_del_init(struct ylist_head *entry)
 {
-       list_del(entry);
+       ylist_del(entry);
        entry->next = entry->prev = entry;
 }
 
 
 /* Test if the list is empty */
-static __inline__ int list_empty(struct list_head *entry)
+static __inline__ int ylist_empty(struct ylist_head *entry)
 {
        return (entry->next == entry);
 }
 
 
-/* list_entry takes a pointer to a list entry and offsets it to that
+/* 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.
  */
- 
- 
-#define list_entry(entry, type, member) \
+
+
+#define ylist_entry(entry, type, member) \
        ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
 
 
-/* list_for_each and list_for_each_safe  iterate over lists.
- * list_for_each_safe uses temporary storage to make the list delete safe
+/* ylist_for_each and list_for_each_safe  iterate over lists.
+ * ylist_for_each_safe uses temporary storage to make the list delete safe
  */
 
-#define list_for_each(itervar, list) \
-       for (itervar = (list)->next; itervar != (list); itervar = itervar->next )
+#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)
+
+
+#if !(defined __KERNEL__)
 
-#define list_for_each_safe(itervar,saveVar, list) \
-       for (itervar = (list)->next, saveVar = (list)->next->next; itervar != (list); \
-        itervar = saveVar, saveVar = saveVar->next)
 
+#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
@@ -124,7 +151,7 @@ static __inline__ int list_empty(struct list_head *entry)
 #define DT_REG         8
 #define DT_LNK         10
 #define DT_SOCK                12
-#define DR_WHT         14
+#define DT_WHT         14
 
 
 #ifndef WIN32
@@ -132,7 +159,8 @@ static __inline__ int list_empty(struct list_head *entry)
 #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
@@ -142,7 +170,6 @@ static __inline__ int list_empty(struct list_head *entry)
 #define ATTR_MTIME     32
 #define ATTR_CTIME     64
 
-
 struct iattr {
        unsigned int ia_valid;
        unsigned ia_mode;
@@ -155,21 +182,15 @@ struct iattr {
        unsigned int ia_attr_flags;
 };
 
-#define KERN_DEBUG
+#endif
 
 #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