SmartPointer.swift

public final class SmartPointer<T> {
    public let pointer: UnsafeMutablePointer<T>
    private let destructor: (UnsafeMutablePointer<T>) -> Void

    public init(pointer: UnsafeMutablePointer<T>, destructor: (UnsafeMutablePointer<T>) -> Void) {
        self.pointer = pointer
        self.destructor = destructor
    }

    deinit {
        self.destructor(self.pointer)
    }
}

let smartPrt = SmartPointer(pointer: UnsafeMutablePointer<Int>(malloc(1024))!, destructor: free)