grand-central-dispatch
How does one efficiently implement file region locking using grand central dispatch?
For my project, I am reading from and writing to a file from multiple threads, so I need to implement file locking. I have tried fcntl(), however it seems that function only works with locking between[详细]
2023-03-21 06:21 分类:问答Isn't dispatch_semaphore_wait FIFO?
The documentation for dispatch_semaphore_wait says that it \"waits in FIFO order for a signal\". But it doesn\'t seem to in this example-- can someone please explain?[详细]
2023-03-18 22:01 分类:问答Good pattern for Internet requests with Grand Central Dispatch?
I\'m currently using synchronous ASIHTTPRequest with GCD queues to download data from the Internet, then parse the response data with JSONKit. What do you think about this pattern. Thank you in advanc[详细]
2023-03-18 11:01 分类:问答Does suspending a dispatch queue suspend its target queue?
I want to create two serial queues A & B. Where queue B is a target of queue A. I want to queue up some blocks on B, and suspend it until i\'m ready to execute them, however i want to continue exe[详细]
2023-03-18 07:38 分类:问答How to write into an array from a dispatch_apply (GCD) loop?
I have written code to calculate the dynamics of a large set of coupled master equation using the Runge-Kutta-method. The code contains a lot of for-loops, where each step is independent. I intend to[详细]
2023-03-18 07:35 分类:问答Task queue on Android like in GCD on iOS?
Is there such a thing as task queue on Android? I know that it can be written by hand but is there a ready to use library开发者_运维知识库 for that?I\'m not sure if there would be a library for this o[详细]
2023-03-18 01:02 分类:问答GCD and KVO problems
My app is want to get the albums list of the iphone and all the photos in certain album. In the app I enumerate the photos in one album of the iphone.[详细]
2023-03-17 15:36 分类:问答dispatch_sync vs. dispatch_async on main queue
Bear with me, this is going to take some explaining. I have a function that looks like the one below.[详细]
2023-03-16 18:32 分类:问答prevent multiple dispatch_queue_create from being created in viewDidLoad
have a view that loads and a serial dispatch queue that is created, loads a ton of stuff in the background and works great.Problem is when I navigate back and forth to开发者_JAVA技巧 that view a new q[详细]
2023-03-16 12:33 分类:问答Using GCD in iOS
So, I was looking at some WWDC session videos again and the speaker told that if you aren开发者_如何学运维\'t using GCD already it\'s time to. So I was googling some tutorial specially for iOS and did[详细]
2023-03-16 11:22 分类:问答