57 lines
1.5 KiB
Objective-C
57 lines
1.5 KiB
Objective-C
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*/
|
|
|
|
#import <Foundation/Foundation.h>
|
|
|
|
/**
|
|
* RCTCache is a simple LRU cache implementation, based on the API of NSCache,
|
|
* but with known, deterministic behavior. The cache will always remove items
|
|
* outside of the specified cost/count limits, and will be automatically
|
|
* cleared in the event of a memory warning.
|
|
*/
|
|
@interface RCTCache : NSCache <NSFastEnumeration>
|
|
|
|
/**
|
|
* The total number of objects currently resident in the cache.
|
|
*/
|
|
@property (nonatomic, readonly) NSUInteger count;
|
|
|
|
/**
|
|
* The total cost of the objects currently resident in the cache.
|
|
*/
|
|
@property (nonatomic, readonly) NSUInteger totalCost;
|
|
|
|
/**
|
|
* Subscripting support
|
|
*/
|
|
- (id)objectForKeyedSubscript:(id<NSCopying>)key;
|
|
- (void)setObject:(id)obj forKeyedSubscript:(id<NSCopying>)key;
|
|
|
|
/**
|
|
* Enumerate cached objects
|
|
*/
|
|
- (void)enumerateKeysAndObjectsUsingBlock:(void (^)(id key, id obj, BOOL *stop))block;
|
|
|
|
@end
|
|
|
|
@protocol RCTCacheDelegate <NSCacheDelegate>
|
|
@optional
|
|
|
|
/**
|
|
* Should the specified object be evicted from the cache?
|
|
*/
|
|
- (BOOL)cache:(RCTCache *)cache shouldEvictObject:(id)entry;
|
|
|
|
/**
|
|
* The specified object is about to be evicted from the cache.
|
|
*/
|
|
- (void)cache:(RCTCache *)cache willEvictObject:(id)entry;
|
|
|
|
@end
|