ublk_drv: add device parameter UBLK_PARAM_TYPE_DEVT
[linux-block.git] / io_uring / alloc_cache.h
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1#ifndef IOU_ALLOC_CACHE_H
2#define IOU_ALLOC_CACHE_H
3
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4/*
5 * Don't allow the cache to grow beyond this size.
6 */
7#define IO_ALLOC_CACHE_MAX 512
8
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9struct io_cache_entry {
10 struct hlist_node node;
11};
12
9731bc98 13static inline bool io_alloc_cache_put(struct io_alloc_cache *cache,
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14 struct io_cache_entry *entry)
15{
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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;
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22}
23
24static 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
36static inline void io_alloc_cache_init(struct io_alloc_cache *cache)
37{
38 INIT_HLIST_HEAD(&cache->list);
9731bc98 39 cache->nr_cached = 0;
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40}
41
42static 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 }
9731bc98 51 cache->nr_cached = 0;
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52}
53#endif