X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=devextras.h;h=a9366fdd2e79b182750938d655036f7928c99ceb;hp=55c31219d3dd7bb09b567900e0f73da18a52b903;hb=f8021b6b5a5f5d9b407c9be95f96da6999cdc247;hpb=e8cfe05cf0d057f6978c37943e51b17bb14664e3

diff --git a/devextras.h b/devextras.h
index 55c3121..a9366fd 100644
--- a/devextras.h
+++ b/devextras.h
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -24,7 +24,7 @@
 #define __EXTRAS_H__
 
 
-#if !(defined __KERNEL__)
+#if !(defined __KERNEL__) 
 
 /* Definition of types */
 typedef unsigned char __u8;
@@ -44,6 +44,12 @@ struct ylist_head {
 };
 
 
+/* Initialise a static list */
+#define YLIST_HEAD(name) \
+struct ylist_head name = { &(name),&(name)}
+
+
+
 /* Initialise a list head to an empty list */
 #define YINIT_LIST_HEAD(p) \
 do { \
@@ -54,41 +60,53 @@ do { \
 
 /* Add an element to a list */
 static __inline__ void ylist_add(struct ylist_head *newEntry, 
-				 struct ylist_head *list)
+                                 struct ylist_head *list)
 {
-	struct ylist_head *listNext = list->next;
-	
-	list->next = newEntry;
-	newEntry->prev = list;
+        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 ylist_del(struct ylist_head *entry)
 {
-	struct ylist_head *listNext = entry->next;
-	struct ylist_head *listPrev = entry->prev;
-	
-	listNext->prev = listPrev;
-	listPrev->next = listNext;
-	
+        struct ylist_head *listNext = entry->next;
+        struct ylist_head *listPrev = entry->prev;
+        
+        listNext->prev = listPrev;
+        listPrev->next = listNext;
+        
 }
 
 static __inline__ void ylist_del_init(struct ylist_head *entry)
 {
-	ylist_del(entry);
-	entry->next = entry->prev = entry;
+        ylist_del(entry);
+        entry->next = entry->prev = entry;
 }
 
 
 /* Test if the list is empty */
 static __inline__ int ylist_empty(struct ylist_head *entry)
 {
-	return (entry->next == entry);
+        return (entry->next == entry);
 }
 
 
@@ -98,7 +116,7 @@ static __inline__ int ylist_empty(struct ylist_head *entry)
  
  
 #define ylist_entry(entry, type, member) \
-	((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
+        ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
 
 
 /* ylist_for_each and list_for_each_safe  iterate over lists.
@@ -106,11 +124,11 @@ static __inline__ int ylist_empty(struct ylist_head *entry)
  */
 
 #define ylist_for_each(itervar, list) \
-	for (itervar = (list)->next; itervar != (list); itervar = itervar->next )
+        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)
+        for (itervar = (list)->next, saveVar = (list)->next->next; itervar != (list); \
+         itervar = saveVar, saveVar = saveVar->next)
 
 
 #if !(defined __KERNEL__)
@@ -125,15 +143,15 @@ static __inline__ int ylist_empty(struct ylist_head *entry)
 /* File types */
 
 
-#define DT_UNKNOWN	0
-#define DT_FIFO		1
-#define DT_CHR		2
+#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
@@ -141,17 +159,17 @@ static __inline__ int ylist_empty(struct ylist_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
+#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
 
-
 struct iattr {
 	unsigned int ia_valid;
 	unsigned ia_mode;
@@ -161,7 +179,7 @@ struct iattr {
 	unsigned ia_atime;
 	unsigned ia_mtime;
 	unsigned ia_ctime;
-	unsigned int ia_attr_flags;
+        unsigned int ia_attr_flags;
 };
 
 #endif