lru.c File Reference

#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <uthash.h>
#include <aaruformat.h>

Go to the source code of this file.

Functions
void *	find_in_cache_uint64 (struct CacheHeader *cache, const uint64_t key)
	Finds a value in the cache by uint64_t key.
void	add_to_cache_uint64 (struct CacheHeader *cache, const uint64_t key, void *value)
	Adds a value to the cache with a uint64_t key, evicting LRU if full.
void	free_cache (struct CacheHeader *cache)
	Frees all entries in the cache and clears it.

Function Documentation

add_to_cache_uint64()

void add_to_cache_uint64	(	struct CacheHeader *	cache,
		const uint64_t	key,
		void *	value )

Adds a value to the cache with a uint64_t key, evicting LRU if full.

Adds a new entry to the cache. If the cache exceeds its maximum size, evicts the least recently used (oldest insertion-order) entry.

Parameters

cache	Pointer to the cache header.
key	64-bit integer key to add.
value	Pointer to the value to store.

Definition at line 48 of file lru.c.

References CacheHeader::cache, CacheHeader::free_func, CacheEntry::hh, CacheEntry::key, CacheHeader::max_items, and CacheEntry::value.

Referenced by aaruf_read_sector(), and ec_recover_data_block().

find_in_cache_uint64()

void * find_in_cache_uint64	(	struct CacheHeader *	cache,
		const uint64_t	key )

Finds a value in the cache by uint64_t key.

Searches for a value using a native 64-bit integer key and promotes it to the front of the insertion-order list (LRU refresh) if found.

Parameters

cache	Pointer to the cache header.
key	64-bit integer key to search for.

Returns

Pointer to the value if found, or NULL if not found.

Definition at line 24 of file lru.c.

References CacheHeader::cache, CacheEntry::hh, CacheEntry::key, and CacheEntry::value.

Referenced by aaruf_read_sector().

free_cache()

void free_cache

(

struct CacheHeader *

cache

)

Frees all entries in the cache and clears it.

Iterates through all cache entries, frees them, then clears the hash table. Uses the cache's free_func if set to free cached values.

Parameters

cache

Pointer to the cache header.

Definition at line 82 of file lru.c.

References CacheHeader::cache, CacheHeader::free_func, CacheEntry::hh, and CacheEntry::value.

Referenced by aaruf_close().