From 9b797a37c4bd83b03cedcfbd15852b836f5e562c Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 7 Jul 2022 14:16:20 -0600 Subject: io_uring: add abstraction around apoll cache In preparation for adding limits, and one more user, abstract out the core bits of the allocation+free cache. Signed-off-by: Jens Axboe --- io_uring/alloc_cache.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 io_uring/alloc_cache.h (limited to 'io_uring/alloc_cache.h') diff --git a/io_uring/alloc_cache.h b/io_uring/alloc_cache.h new file mode 100644 index 000000000000..98f2374c37c7 --- /dev/null +++ b/io_uring/alloc_cache.h @@ -0,0 +1,41 @@ +#ifndef IOU_ALLOC_CACHE_H +#define IOU_ALLOC_CACHE_H + +struct io_cache_entry { + struct hlist_node node; +}; + +static inline void io_alloc_cache_put(struct io_alloc_cache *cache, + struct io_cache_entry *entry) +{ + hlist_add_head(&entry->node, &cache->list); +} + +static inline struct io_cache_entry *io_alloc_cache_get(struct io_alloc_cache *cache) +{ + if (!hlist_empty(&cache->list)) { + struct hlist_node *node = cache->list.first; + + hlist_del(node); + return container_of(node, struct io_cache_entry, node); + } + + return NULL; +} + +static inline void io_alloc_cache_init(struct io_alloc_cache *cache) +{ + INIT_HLIST_HEAD(&cache->list); +} + +static inline void io_alloc_cache_free(struct io_alloc_cache *cache, + void (*free)(struct io_cache_entry *)) +{ + while (!hlist_empty(&cache->list)) { + struct hlist_node *node = cache->list.first; + + hlist_del(node); + free(container_of(node, struct io_cache_entry, node)); + } +} +#endif -- cgit v1.2.3