GCD,@synchronized 实现生产者-消费者模型

来源：互联网发布：马自达 mx5 rf 知乎编辑：程序博客网时间：2024/06/06 09:16

// ViewController.m

// Test

// Created by 小白 on 2016/12/10.

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic,strong) NSMutableArray * arrM;

@end

@implementation ViewController

- (void)viewDidLoad {

[superviewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

_arrM = [NSMutableArrayarray];

[selfproducerFunc];

[selfconsumerFunc];

}

- (void)producerFunc{

dispatch_queue_t queue =dispatch_get_global_queue(0,0);

dispatch_async(queue, ^{

while (1) {

if (_arrM.count ==10) {

NSLog(@"库存已满，等待消费中");

}else{

@synchronized (self) {

NSLog(@"添加商品中");

sleep(1);

[_arrMaddObject:@"商品"];

NSLog(@"添加完毕,当前商品数：%ld",_arrM.count);

}

sleep(5);

}

});

}

- (void)consumerFunc{

dispatch_queue_t queue =dispatch_get_global_queue(0,0);

dispatch_async(queue, ^{

while (1) {

if (_arrM.count ==0) {

NSLog(@"库存已空,等待添加库存");

}else{

@synchronized (self) {

NSLog(@"消耗商品中");

sleep(1);

[_arrMremoveObjectAtIndex:0];

NSLog(@"商品消耗完毕,当前商品数：%ld",_arrM.count);

}

sleep(5);

}

});

}

- (void)didReceiveMemoryWarning {

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end

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