diff options
author | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-02-01 08:59:27 +0000 |
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committer | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-02-01 08:59:27 +0000 |
commit | 7af65953de0127d971a7dc20bea611213bd1473c (patch) | |
tree | 3aea320d21d2222f201c90624de881f1b9b7bc24 /ccan/list | |
parent | 6eeb0f7ef48c9bc27f7d8508a1b43ae6128fcc96 (diff) |
ccan/list: sync with upstream
This brings us up-to-date with ccan/list
5dbd87b876434dd703dfcc30cb0503118aac2076
git://git.ozlabs.org/~ccan/ccan
This is a combination of 3 commits from ccan:
list: add parens to gaurd macro args in LIST_INIT
ccan/list: Add list_empty_nocheck
list: trivial: fix typos in list_for_each_off's documentation
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62152 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ccan/list')
-rw-r--r-- | ccan/list/list.h | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/ccan/list/list.h b/ccan/list/list.h index ca9f9f1f7f..59ab45ee53 100644 --- a/ccan/list/list.h +++ b/ccan/list/list.h @@ -57,7 +57,7 @@ struct list_head * Example: * static struct list_head my_list = LIST_HEAD_INIT(my_list); */ -#define LIST_HEAD_INIT(name) { { &name.n, &name.n } } +#define LIST_HEAD_INIT(name) { { &(name).n, &(name).n } } /** * LIST_HEAD - define and initialize an empty list_head @@ -238,6 +238,21 @@ static inline int list_empty_nodebug(const struct list_head *h) #endif /** + * list_empty_nocheck - is a list empty? + * @h: the list_head + * + * If the list is empty, returns true. This doesn't perform any + * debug check for list consistency, so it can be called without + * locks, racing with the list being modified. This is ok for + * checks where an incorrect result is not an issue (optimized + * bail out path for example). + */ +static inline bool list_empty_nocheck(const struct list_head *h) +{ + return h->n.next == &h->n; +} + +/** * list_del - delete an entry from an (unknown) linked list. * @n: the list_node to delete from the list. * @@ -647,12 +662,12 @@ static inline void list_prepend_list_(struct list_head *to, * so you can break and continue as normal. * * WARNING! Being the low-level macro that it is, this wrapper doesn't know - * nor care about the type of @i. The only assumtion made is that @i points + * nor care about the type of @i. The only assumption made is that @i points * to a chunk of memory that at some @offset, relative to @i, contains a - * properly filled `struct node_list' which in turn contains pointers to - * memory chunks and it's turtles all the way down. Whith all that in mind + * properly filled `struct list_node' which in turn contains pointers to + * memory chunks and it's turtles all the way down. With all that in mind * remember that given the wrong pointer/offset couple this macro will - * happilly churn all you memory untill SEGFAULT stops it, in other words + * happily churn all you memory until SEGFAULT stops it, in other words * caveat emptor. * * It is worth mentioning that one of legitimate use-cases for that wrapper |