When you've passed a reference to some Swift class instance into C function as UnsafeRawPointer, how could you restore class instance from this UnsafeRawPointer when C function passes it back to Swift?
import Foundation
class C {
func selfToPointer() -> UnsafeRawPointer! {
return UnsafeRawPointer(Unmanaged.passUnretained(self).toOpaque())
}
func selfFromPointer(this: UnsafeRawPointer!) -> C {
return ???
//return this.assumingMemoryBound(to: C.self).pointee
// return this.load(as: C.self)
}
func check() {
print("1. self == \(self)")
let this:UnsafeRawPointer! = selfToPointer()
print("2, this == \(String(describing: this))")
let c:C = selfFromPointer(this: this)
print("3, c == \(String(describing: c))")
}
}
