]> git.ipfire.org Git - thirdparty/linux.git/blob - io_uring/alloc_cache.h
Merge branch 'for-6.2/sony' into for-linus
[thirdparty/linux.git] / io_uring / alloc_cache.h
1 #ifndef IOU_ALLOC_CACHE_H
2 #define IOU_ALLOC_CACHE_H
3
4 /*
5 * Don't allow the cache to grow beyond this size.
6 */
7 #define IO_ALLOC_CACHE_MAX 512
8
9 struct io_cache_entry {
10 struct hlist_node node;
11 };
12
13 static inline bool io_alloc_cache_put(struct io_alloc_cache *cache,
14 struct io_cache_entry *entry)
15 {
16 if (cache->nr_cached < IO_ALLOC_CACHE_MAX) {
17 cache->nr_cached++;
18 hlist_add_head(&entry->node, &cache->list);
19 return true;
20 }
21 return false;
22 }
23
24 static inline struct io_cache_entry *io_alloc_cache_get(struct io_alloc_cache *cache)
25 {
26 if (!hlist_empty(&cache->list)) {
27 struct hlist_node *node = cache->list.first;
28
29 hlist_del(node);
30 return container_of(node, struct io_cache_entry, node);
31 }
32
33 return NULL;
34 }
35
36 static inline void io_alloc_cache_init(struct io_alloc_cache *cache)
37 {
38 INIT_HLIST_HEAD(&cache->list);
39 cache->nr_cached = 0;
40 }
41
42 static inline void io_alloc_cache_free(struct io_alloc_cache *cache,
43 void (*free)(struct io_cache_entry *))
44 {
45 while (!hlist_empty(&cache->list)) {
46 struct hlist_node *node = cache->list.first;
47
48 hlist_del(node);
49 free(container_of(node, struct io_cache_entry, node));
50 }
51 cache->nr_cached = 0;
52 }
53 #endif