How to allocate -> send -> receive -> cast -> deallocate UnsafeRawPointer from extension to app?

Question

I am new in UnsafeRawPointer. As I got I need to allocate unsafe memory in my extension and send pointer to my app where has to cast and release it. Below is a sk

Answer 1

Thanks @MartinR, I got all answers on my questions.

We can't send an object though CFNotificationCenterPostNotification so we need to use Darwin and UserDefaults(suitename:) combination.

Schema

1. Add the CFNotificationCenterAddObserver observer in the app code
2. Save sending object in UserDefaults(suitename:)
3. Send the didObjectChanged notification through CFNotificationCenterPostNotification code
4. Catch didObjectChanged notification in CFNotificationCallback in the app code
5. Read sending object from UserDefaults(suitename:)

Off-topic

Question Why do we use UnsafeRawPointer? sample

Answer CFNotificationCenterPostNotification is actually a C function, and the callback is also a pure C function. C knows nothing about Swift types or instance pointers. That's why the object parameter is a UnsafeRawPointer (the Swift equivalent of void *).