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util/list: Add list_empty and list_length functions

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v2: Don't use C99 when iterating over the list

Acked-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
This commit is contained in:
Jason Ekstrand 2015-04-27 20:39:37 -07:00
parent b31d8983ba
commit addcf41066
1 changed files with 15 additions and 0 deletions
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15
src/util/list.h
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@ -38,6 +38,7 @@
#define _UTIL_LIST_H_ #define _UTIL_LIST_H_
#include <stdbool.h>
#include <stddef.h> #include <stddef.h>
@ -92,6 +93,20 @@ static inline void list_delinit(struct list_head *item)
item->prev = 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_INITHEAD(__item) list_inithead(__item)
#define LIST_ADD(__item, __list) list_add(__item, __list) #define LIST_ADD(__item, __list) list_add(__item, __list)
#define LIST_ADDTAIL(__item, __list) list_addtail(__item, __list) #define LIST_ADDTAIL(__item, __list) list_addtail(__item, __list)