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GCReusableQueue.m
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GCReusableQueue.m
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//
// GCReusableQueue.m
// GCReusableQueue
//
// Created by Glenn Chiu on 31-05-12.
// Copyright (c) 2012 Dot Square. All rights reserved.
//
// This code is distributed under the terms and conditions of the MIT license.
// Copyright (c) 2011 Glenn Chiu
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#import "GCReusableQueue.h"
#import <TargetConditionals.h>
@implementation GCReusableQueue
{
NSCache *_reusableObjects;
id _observer;
}
- (id)init
{
self = [super init];
if (self)
{
#if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
__weak GCReusableQueue *w_self = self;
self->_observer = [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidReceiveMemoryWarningNotification
object:nil
queue:nil
usingBlock:^(NSNotification *note) {
GCReusableQueue *s_self = w_self;
[s_self clearQueue];
}];
#endif
}
return self;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self->_observer];
}
- (NSCache *)reusableObjects
{
if (!self->_reusableObjects)
{
self->_reusableObjects = [NSCache new];
}
return self->_reusableObjects;
}
- (id <ReusableObject>)dequeueReusableObjectWithIdentifier:(NSString *)identifier
{
NSParameterAssert(identifier);
NSMutableSet *objects = [[self reusableObjects] objectForKey:identifier];
id <ReusableObject> obj = [objects anyObject];
if (obj)
{
[objects removeObject:obj];
}
return obj;
}
- (void)enqueueReusableObject:(id <ReusableObject>)obj
{
NSMutableSet *objects = [[self reusableObjects] objectForKey:[obj reuseIdentifier]];
if (!objects)
{
objects = [NSMutableSet set];
[[self reusableObjects] setObject:objects forKey:[obj reuseIdentifier]];
}
else
{
[objects addObject:obj];
}
}
- (void)clearQueue
{
[[self reusableObjects] removeAllObjects];
}
@end