62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
#ifndef IOU_ALLOC_CACHE_H
|
|
#define IOU_ALLOC_CACHE_H
|
|
|
|
/*
|
|
* Don't allow the cache to grow beyond this size.
|
|
*/
|
|
#define IO_ALLOC_CACHE_MAX 128
|
|
|
|
static inline bool io_alloc_cache_put(struct io_alloc_cache *cache,
|
|
void *entry)
|
|
{
|
|
if (cache->nr_cached < cache->max_cached) {
|
|
if (!kasan_mempool_poison_object(entry))
|
|
return false;
|
|
cache->entries[cache->nr_cached++] = entry;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static inline void *io_alloc_cache_get(struct io_alloc_cache *cache)
|
|
{
|
|
if (cache->nr_cached) {
|
|
void *entry = cache->entries[--cache->nr_cached];
|
|
|
|
kasan_mempool_unpoison_object(entry, cache->elem_size);
|
|
return entry;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* returns false if the cache was initialized properly */
|
|
static inline bool io_alloc_cache_init(struct io_alloc_cache *cache,
|
|
unsigned max_nr, size_t size)
|
|
{
|
|
cache->entries = kvmalloc_array(max_nr, sizeof(void *), GFP_KERNEL);
|
|
if (cache->entries) {
|
|
cache->nr_cached = 0;
|
|
cache->max_cached = max_nr;
|
|
cache->elem_size = size;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static inline void io_alloc_cache_free(struct io_alloc_cache *cache,
|
|
void (*free)(const void *))
|
|
{
|
|
void *entry;
|
|
|
|
if (!cache->entries)
|
|
return;
|
|
|
|
while ((entry = io_alloc_cache_get(cache)) != NULL)
|
|
free(entry);
|
|
|
|
kvfree(cache->entries);
|
|
cache->entries = NULL;
|
|
}
|
|
#endif
|