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MEDIUM: lists: list_for_each_entry{_safe}_from functions 

Add list_for_each_entry_from and list_for_each_entry_safe_from which
allows to iterate in a list starting from a specific item.
This commit is contained in:
William Lallemand 2017-09-24 11:26:02 +02:00 committed by Willy Tarreau
parent 2a97966b08
commit 83215a44b8
1 changed files with 22 additions and 0 deletions
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22
include/common/mini-clist.h
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@ -127,6 +127,16 @@ struct cond_wordlist {
&item->member != (list_head); \
item = LIST_ELEM(item->member.n, typeof(item), member))
/*
* Same as list_for_each_entry but starting from current point
* Iterates <item> through the list starting from <item>
* It's basically the same macro but without initializing item to the head of
* the list.
*/
#define list_for_each_entry_from(item, list_head, member) \
for ( ; &item->member != (list_head); \
item = LIST_ELEM(item->member.n, typeof(item), member))
/*
* Simpler FOREACH_ITEM_SAFE macro inspired from Linux sources.
* Iterates <item> through a list of items of type "typeof(*item)" which are
@ -142,4 +152,16 @@ struct cond_wordlist {
item = back, back = LIST_ELEM(back->member.n, typeof(back), member))
/*
* Same as list_for_each_entry_safe but starting from current point
* Iterates <item> through the list starting from <item>
* It's basically the same macro but without initializing item to the head of
* the list.
*/
#define list_for_each_entry_safe_from(item, back, list_head, member) \
for (back = LIST_ELEM(item->member.n, typeof(item), member); \
&item->member != (list_head); \
item = back, back = LIST_ELEM(back->member.n, typeof(back), member))
#endif /* _COMMON_MINI_CLIST_H */