I have a block of code that is accessed frequently and from either the main thread or several other background threads. I need to ensure that this code only gets processed one at a time.

I'm currently using a @synchronized(self) { } block but I'm not sure if that's providing the correct protection. How does it differ from an NSLock instance?

Finally, can anyone suggest how I can protect my method? The method is in my application delegate, and I access it from various threads by calling:

[[[UIApplication sharedApplication] delegate] myMethod];

Many thanks,

Mike

ios iphone multithreading
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