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* [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses) With permission of the Facebook Open Source team, we are simplifying the Texture license so that clients can rely on the Apache 2 terms that most of Texture is already covered by. This means that code originally forked from AsyncDisplayKit will be re-licensed from "BSD 3-clause + PATENTS v2" to Apache 2 without a PATENTS file. After getting confirmation that the updates to these core files look good, we'll propagate this new license header to all files (in this same PR) and get sign-off from all parties before landing. * [License] Update all Texture source files to be pure Apache 2. * Changelog entry for Apache 2 license update. * Revert "[License] Update all Texture source files to be pure Apache 2." This reverts commit ffa0fbbba9717d871dd16c4b07539f2f8208fc2b. * [License] Update all Texture source files to be pure Apache 2, maintaining copyrights. * [License] Update CONTRIBUTING, README, Podspec & Dangerfile.
85 lines
1.8 KiB
Objective-C
85 lines
1.8 KiB
Objective-C
//
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// ASWeakSet.m
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <AsyncDisplayKit/ASWeakSet.h>
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@interface ASWeakSet<__covariant ObjectType> ()
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@property (nonatomic, readonly) NSHashTable<ObjectType> *hashTable;
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@end
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@implementation ASWeakSet
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- (instancetype)init
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{
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self = [super init];
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if (self) {
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_hashTable = [NSHashTable hashTableWithOptions:NSHashTableWeakMemory | NSHashTableObjectPointerPersonality];
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}
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return self;
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}
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- (void)addObject:(id)object
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{
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[_hashTable addObject:object];
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}
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- (void)removeObject:(id)object
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{
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[_hashTable removeObject:object];
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}
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- (void)removeAllObjects
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{
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[_hashTable removeAllObjects];
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}
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- (NSArray *)allObjects
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{
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return _hashTable.allObjects;
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}
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- (BOOL)containsObject:(id)object
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{
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return [_hashTable containsObject:object];
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}
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- (BOOL)isEmpty
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{
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return [_hashTable anyObject] == nil;
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}
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/**
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Note: The `count` property of NSHashTable is unreliable
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in the case of weak-memory hash tables because entries
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that have been deallocated are not removed immediately.
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In order to get the true count we have to fall back to using
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fast enumeration.
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*/
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- (NSUInteger)count
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{
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NSUInteger count = 0;
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for (__unused id object in _hashTable) {
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count += 1;
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}
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return count;
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}
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- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(__unsafe_unretained id _Nonnull *)buffer count:(NSUInteger)len
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{
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return [_hashTable countByEnumeratingWithState:state objects:buffer count:len];
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}
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- (NSString *)description
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{
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return [[super description] stringByAppendingFormat:@" count: %tu, contents: %@", self.count, _hashTable];
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}
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@end
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