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53 lines
1.1 KiB
53 lines
1.1 KiB
#ifndef IOU_ALLOC_CACHE_H |
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#define IOU_ALLOC_CACHE_H |
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/* |
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* Don't allow the cache to grow beyond this size. |
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*/ |
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#define IO_ALLOC_CACHE_MAX 512 |
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struct io_cache_entry { |
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struct hlist_node node; |
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}; |
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static inline bool io_alloc_cache_put(struct io_alloc_cache *cache, |
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struct io_cache_entry *entry) |
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{ |
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if (cache->nr_cached < IO_ALLOC_CACHE_MAX) { |
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cache->nr_cached++; |
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hlist_add_head(&entry->node, &cache->list); |
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return true; |
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} |
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return false; |
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} |
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static inline struct io_cache_entry *io_alloc_cache_get(struct io_alloc_cache *cache) |
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{ |
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if (!hlist_empty(&cache->list)) { |
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struct hlist_node *node = cache->list.first; |
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hlist_del(node); |
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return container_of(node, struct io_cache_entry, node); |
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} |
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return NULL; |
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} |
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static inline void io_alloc_cache_init(struct io_alloc_cache *cache) |
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{ |
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INIT_HLIST_HEAD(&cache->list); |
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cache->nr_cached = 0; |
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} |
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static inline void io_alloc_cache_free(struct io_alloc_cache *cache, |
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void (*free)(struct io_cache_entry *)) |
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{ |
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while (!hlist_empty(&cache->list)) { |
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struct hlist_node *node = cache->list.first; |
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hlist_del(node); |
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free(container_of(node, struct io_cache_entry, node)); |
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} |
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cache->nr_cached = 0; |
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} |
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#endif
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