iOS常见知识问答

作者 wintelsui | 2019-02-22 | 技术

❏ 锁

http://www.cocoachina.com/cms/wap.php?action=article&id=22402

https://github.com/bestswifter/blog/blob/master/articles/ios-lock.md

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OSSpinLock :

OSSpinLock lock = OS_SPINLOCK_INIT;
					OSSpinLockLock(&lock);
					OSSpinLockUnlock(&lock);
					

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synchronized :

@synchronized(self) {}
					

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dispatch_semaphore :
					dispatch_semaphore_t semaphore = dispatch_semaphore_create(0); 
					dispatch_semaphore_signal(semaphore); 
					dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
					

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