2014/10/15 下午 10:08:58

iphone Programming Glossary: fifo

NSManagedObjectContext performBlockAndWait: doesn't execute on background thread?

http://stackoverflow.com/questions/11831946/nsmanagedobjectcontext-performblockandwait-doesnt-execute-on-background-thread

the unspoken implications of this in that the way in which performBlockAndWait provides re entrant support breaks the FIFO ordering of blocks. As an example... context performBlockAndWait ^ NSLog @ One context performBlock ^ NSLog @ Two context.. One context performBlock ^ NSLog @ Two context performBlockAndWait ^ NSLog @ Three Note that strict adherence to the FIFO guarantee of the queue would mean that the nested performBlockAndWait Three would run after the asynchronous block Two since..

How to achieve concurrent task through NSOperation? [closed]

http://stackoverflow.com/questions/12910479/how-to-achieve-concurrent-task-through-nsoperation

through NSoperation is it possible without NSoperationQueue Even if we use NSoperationQueue it will perform operations FIFO format.How will it execute Concurrently iphone ios ipad grand central dispatch nsthread share improve this question ..

Audio recorded using Audio Queue Services to data

http://stackoverflow.com/questions/8451084/audio-recorded-using-audio-queue-services-to-data

What's the difference between the “global queue” and the “main queue” in GCD?

http://stackoverflow.com/questions/9602042/whats-the-difference-between-the-global-queue-and-the-main-queue-in-gcd

with dispatch_queue_create the global concurrent queues schedule blocks as soon as threads become available non FIFO completion order . The global concurrent queues represent three priority bands DISPATCH_QUEUE_PRIORITY_HIGH DISPATCH_QUEUE_PRIORITY_DEFAULT..