From 7b396a45d43cc464539cc25799ddda3a27339bd8 Mon Sep 17 00:00:00 2001 From: Jeremy Kerr Date: Tue, 16 Apr 2013 11:39:59 +0800 Subject: lib/list: Add list_for_each_entry_safe Add a list iterator that is safe against deletion of the current element. Signed-off-by: Jeremy Kerr --- lib/list/list.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/lib/list/list.h b/lib/list/list.h index cd9cd10..97fb615 100644 --- a/lib/list/list.h +++ b/lib/list/list.h @@ -40,6 +40,14 @@ struct list { #define list_for_each_entry_continue(_list, _pos, _member) \ for (; _pos; _pos = list_next_entry(_list, _pos, _member)) +#define list_for_each_entry_safe(_list, _pos, _tmp, _member) \ + for (_pos = container_of((_list)->head.next, typeof(*_pos), _member), \ + _tmp = container_of(_pos->_member.next, typeof(*_pos), \ + _member); \ + &_pos->_member != &(_list)->head; \ + _pos = _tmp, \ + _tmp = list_entry(_tmp->_member.next, typeof(*_pos), \ + _member, _list)) #define DEFINE_LIST(_list) struct list _list = { \ .head = { \ -- cgit v1.2.1