summaryrefslogtreecommitdiff
path: root/scripts/config/list.h
diff options
context:
space:
mode:
authorFelix Fietkau <nbd@openwrt.org>2013-04-18 12:05:16 +0000
committerFelix Fietkau <nbd@openwrt.org>2013-04-18 12:05:16 +0000
commit9d5510a500a1804484152adb8951dda3688658bc (patch)
tree6e4d8725c2956742201d0e14126f7e457b453c66 /scripts/config/list.h
parent97e7fdf6fdb8a91da52f622b499181171262af19 (diff)
downloadmtk-20170518-9d5510a500a1804484152adb8951dda3688658bc.zip
mtk-20170518-9d5510a500a1804484152adb8951dda3688658bc.tar.gz
mtk-20170518-9d5510a500a1804484152adb8951dda3688658bc.tar.bz2
build: add new menuconfig code based on linux 3.9
SVN-Revision: 36361
Diffstat (limited to 'scripts/config/list.h')
-rw-r--r--scripts/config/list.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/scripts/config/list.h b/scripts/config/list.h
new file mode 100644
index 0000000..0ae730b
--- /dev/null
+++ b/scripts/config/list.h
@@ -0,0 +1,91 @@
+#ifndef LIST_H
+#define LIST_H
+
+/*
+ * Copied from include/linux/...
+ */
+
+#undef offsetof
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+/**
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr: the pointer to the member.
+ * @type: the type of the container struct this is embedded in.
+ * @member: the name of the member within the struct.
+ *
+ */
+#define container_of(ptr, type, member) ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) );})
+
+
+struct list_head {
+ struct list_head *next, *prev;
+};
+
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define LIST_HEAD(name) \
+ struct list_head name = LIST_HEAD_INIT(name)
+
+/**
+ * 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) \
+ container_of(ptr, type, member)
+
+/**
+ * list_for_each_entry - iterate over list of given type
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ */
+#define list_for_each_entry(pos, head, member) \
+ for (pos = list_entry((head)->next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_empty - tests whether a list is empty
+ * @head: the list to test.
+ */
+static inline int list_empty(const struct list_head *head)
+{
+ return head->next == head;
+}
+
+/*
+ * 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_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)
+{
+ __list_add(_new, head->prev, head);
+}
+
+#endif