Mesa (master): util/list: Add list_empty and list_length functions
Jason Ekstrand
jekstrand at kemper.freedesktop.org
Sat May 9 00:29:59 UTC 2015
Module: Mesa
Branch: master
Commit: addcf41066d28a5d2d5ed112a65a3958b056bd19
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=addcf41066d28a5d2d5ed112a65a3958b056bd19
Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date: Mon Apr 27 20:39:37 2015 -0700
util/list: Add list_empty and list_length functions
v2: Don't use C99 when iterating over the list
Acked-by: Connor Abbott <cwabbott0 at gmail.com>
Reviewed-by: Rob Clark <robclark at freedesktop.org>
---
src/util/list.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/src/util/list.h b/src/util/list.h
index 287a494..73b6272 100644
--- a/src/util/list.h
+++ b/src/util/list.h
@@ -38,6 +38,7 @@
#define _UTIL_LIST_H_
+#include <stdbool.h>
#include <stddef.h>
@@ -92,6 +93,20 @@ static inline void list_delinit(struct list_head *item)
item->prev = item;
}
+static inline bool list_empty(struct list_head *list)
+{
+ return list->next == list;
+}
+
+static inline unsigned list_length(struct list_head *list)
+{
+ struct list_head *node;
+ unsigned length = 0;
+ for (node = list->next; node != list; node = node->next)
+ length++;
+ return length;
+}
+
#define LIST_INITHEAD(__item) list_inithead(__item)
#define LIST_ADD(__item, __list) list_add(__item, __list)
#define LIST_ADDTAIL(__item, __list) list_addtail(__item, __list)
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