标签:sel code nonatomic pthread queue mic inf interface fun
#import "ViewController.h" #import <Pthread.h> @interface ViewController () @property (nonatomic,assign) pthread_rwlock_t lock; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; pthread_rwlock_init(&_lock, NULL); dispatch_queue_t queue = dispatch_get_global_queue(0, 0); for (int i = 0; i<10; i++) { dispatch_async(queue, ^{ [self read]; }); dispatch_async(queue, ^{ [self read]; }); dispatch_async(queue, ^{ [self write]; }); } } -(void)read{ pthread_rwlock_rdlock(&_lock); sleep(1); NSLog(@"%s",__func__); pthread_rwlock_unlock(&_lock); } -(void)write{ pthread_rwlock_wrlock(&_lock); sleep(1); NSLog(@"%s",__func__); pthread_rwlock_unlock(&_lock); } -(void)dealloc{ pthread_rwlock_destroy(&_lock); } @end
dispatch_barrier_async
#import "ViewController.h" @interface ViewController () @property (nonatomic,strong) dispatch_queue_t queue; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; self.queue = dispatch_queue_create("rw_queue", DISPATCH_QUEUE_CONCURRENT); for (int i =0; i<10; i++) { dispatch_async(self.queue, ^{ [self read]; }); dispatch_async(self.queue, ^{ [self read]; }); dispatch_barrier_sync(self.queue, ^{ [self write]; }); } } -(void)read{ sleep(1); NSLog(@"%s",__func__); } -(void)write{ sleep(1); NSLog(@"%s",__func__); } @end
iOS 读写操作 处理 pthread_rwlock dispatch_barrier_async
标签:sel code nonatomic pthread queue mic inf interface fun
原文地址:https://www.cnblogs.com/ZhangShengjie/p/12297303.html