#import "ReadWriteLockTest1.h"

@interface ReadWriteLockTest1()

@property(nonatomic, strong) dispatch_queue_t queue;

@implementation ReadWriteLockTest1

-(instancetype)init {

self = [super init];

if (self) {

//初始化并发队列

self.queue = dispatch_queue_create("rw_queue", DISPATCH_QUEUE_CONCURRENT);

}

return self;

}

-(void)otherTest {

for (int i = 0 ; i < 10; i++) {

[self __write];

[self __read];

[self __read];

[self __read];

}

}

-(void)__read{

dispatch_async(_queue, ^{

sleep(1.0);

NSLog(@"read");

});

}

-(void)__write {

dispatch_barrier_async(_queue, ^{

sleep(1.0);

NSLog(@"write");

});

}