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97 lines
1.3 KiB
97 lines
1.3 KiB
//
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// PEPQueue.m
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// pEpiOSAdapter
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//
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// Created by Volker Birk on 15.07.15.
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// Copyright (c) 2015 p≡p. All rights reserved.
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//
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#import "PEPQueue.h"
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@interface PEPQueue ()
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@property (nonatomic, strong) NSMutableArray *queue;
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@property (nonatomic, strong) NSCondition *cond;
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@end
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@implementation PEPQueue
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- (id)init
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{
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self = [super init];
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if (self)
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{
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self.queue = [[NSMutableArray alloc] init];
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self.cond = [[NSCondition alloc] init];
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}
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return self;
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}
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- (void)enqueue:(id)object
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{
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@synchronized(self) {
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if (_queue)
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[_queue insertObject:object atIndex:0];
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}
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[_cond signal];
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}
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- (BOOL)condwait
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{
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BOOL res;
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@synchronized(self) {
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res = _queue && _queue.count == 0;
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}
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return res;
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}
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- (id)dequeue
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{
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id tmp = nil;
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[_cond lock];
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while ([self condwait])
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{
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[_cond wait];
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}
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@synchronized(self) {
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if (_queue)
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{
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tmp = [_queue lastObject];
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[_queue removeLastObject];
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}
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}
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[_cond unlock];
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return tmp;
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}
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- (void)kill
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{
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_queue = nil;
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[_cond signal];
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}
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- (NSUInteger)count
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{
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return [_queue count];
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}
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- (void)dealloc
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{
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self.queue = nil;
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self.cond = nil;
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}
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@end
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