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add list_add_sort to list implementation

This commit is contained in:
sascha 2007-10-19 12:43:00 +02:00
parent 8a46c1102f
commit f1020bd2d5
1 changed files with 24 additions and 0 deletions
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24
include/list.h
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@ -429,6 +429,30 @@ static inline void list_splice_init(struct list_head *list,
&pos->member != (head); \
pos = n, n = list_entry(n->member.prev, typeof(*n), member))
/**
* list_add_sort - add a new entry to a sorted list
* @new: new entry to be added
* @head: list head to add it in
* @compare: Compare function to compare two list entries
*
* Insert a new entry before the specified head.
* This is useful for implementing queues.
*/
static inline void list_add_sort(struct list_head *new, struct list_head *head,
int (*compare)(struct list_head *a, struct list_head *b))
{
struct list_head *pos, *insert = head;
list_for_each(pos, head) {
if (compare(pos, new) < 0)
continue;
insert = pos;
break;
}
list_add_tail(new, insert);
}
/*
* Double linked lists with a single pointer list head.
* Mostly useful for hash tables where the two pointer list head is