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Add list_link_replace() function 

The list_link_replace() function with swap a new item it to the place
of an old item in a list.  It is the callers responsibility to ensure
all lists involved are locked properly.
This commit is contained in:
Brian Behlendorf 2010-08-27 13:51:25 -07:00
parent d85e28ad69
commit 8371f981f1
1 changed files with 13 additions and 0 deletions
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13
include/sys/list.h
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@ -203,4 +203,17 @@ spl_list_move_tail(list_t *dst, list_t *src)
#define list_move_tail(dst, src) spl_list_move_tail(dst, src)
static inline void
list_link_replace(list_node_t *old_node, list_node_t *new_node)
{
ASSERT(list_link_active(old_node));
ASSERT(!list_link_active(new_node));
new_node->next = old_node->next;
new_node->prev = old_node->prev;
old_node->prev->next = new_node;
old_node->next->prev = new_node;
list_link_init(old_node);
}
#endif /* SPL_LIST_H */