cache

type Cache interface {
	// Insert adds a block to the cache. If the key already exists, it updates the value.
	// Returns the handle to the cached block.
	Insert(key CacheKey, value []byte, charge uint64) *Handle

	// Lookup retrieves a block from the cache.
	// Returns nil if not found.
	Lookup(key CacheKey) *Handle

	// Release releases a handle obtained from Insert or Lookup.
	// The caller must call Release when done using the handle.
	Release(handle *Handle)

	// Erase removes a key from the cache.
	Erase(key CacheKey)

	// SetCapacity sets the maximum capacity of the cache.
	SetCapacity(capacity uint64)

	// GetCapacity returns the maximum capacity of the cache.
	GetCapacity() uint64

	// GetUsage returns the current usage of the cache.
	GetUsage() uint64

	// GetPinnedUsage returns the usage of currently pinned entries.
	GetPinnedUsage() uint64

	// GetOccupancyCount returns the number of entries in the cache.
	GetOccupancyCount() uint64

	// Close releases all resources associated with the cache.
	Close()
}

type CacheKey struct {
	FileNumber  uint64
	BlockOffset uint64
}

type Handle struct {
	// contains filtered or unexported fields
}

type LRUCache struct {
	// contains filtered or unexported fields
}

type ShardedLRUCache struct {
	// contains filtered or unexported fields
}