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How to block NSLock in a specific thread

I have a property @property NSLock *myLock

And I want to write two methods:

- (void) lock

and

- (void) unlock

These methods lock and unlock myLockaccordingly, and they must do this regardless of which thread or queue called them. For example, thread A may have a name lock, but queue B may be the one who calls unlock. Both of these methods should work properly, without reporting that I am trying to unlock a lock from another thread / queue that blocked it. In addition, they must do this synchronously.

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