Just a couple of functions for removing an element from one list and
adding to another (perhaps even the same list, just at the head or
tail).
Used in future patches.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
src/util/list.h | 27 +++++++++++++++++++++------
1 file changed, 21 insertions(+), 6 deletions(-)
diff --git a/src/util/list.h b/src/util/list.h
index b98ce59..cce1adc 100644
--- a/src/util/list.h
+++ b/src/util/list.h
@@ -55,6 +55,12 @@ static inline void list_inithead(struct list_head *item)
item->next = item;
}
+static inline void __list_del(struct list_head *item)
+{
+ item->prev->next = item->next;
+ item->next->prev = item->prev;
+}
+
static inline void list_add(struct list_head *item, struct list_head *list)
{
item->prev = list;
@@ -63,6 +69,12 @@ static inline void list_add(struct list_head *item, struct
list_head *list)
list->next = item;
}
+inline static void list_move(struct list_head *from, struct list_head *to)
+{
+ __list_del(from);
+ list_add(from, to);
+}
+
static inline void list_addtail(struct list_head *item, struct list_head *list)
{
item->next = list;
@@ -71,6 +83,12 @@ static inline void list_addtail(struct list_head *item,
struct list_head *list)
list->prev = item;
}
+inline static void list_movetail(struct list_head *from, struct list_head *to)
+{
+ __list_del(from);
+ list_addtail(from, to);
+}
+
static inline void list_replace(struct list_head *from, struct list_head *to)
{
to->prev = from->prev;
@@ -81,17 +99,14 @@ static inline void list_replace(struct list_head *from,
struct list_head *to)
static inline void list_del(struct list_head *item)
{
- item->prev->next = item->next;
- item->next->prev = item->prev;
+ __list_del(item);
item->prev = item->next = NULL;
}
static inline void list_delinit(struct list_head *item)
{
- item->prev->next = item->next;
- item->next->prev = item->prev;
- item->next = item;
- item->prev = item;
+ __list_del(item);
+ list_inithead(item);
}
static inline bool list_empty(struct list_head *list)
--
2.5.0
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