Method new

src/rc/weak.rs:18–22

Constructs a `WeakPtr` to the given object. Unsafe because the caller must ensure the given object pointer is valid.

(obj: *mut Object)

    /// Constructs a `WeakPtr` to the given object.
    /// Unsafe because the caller must ensure the given object pointer is valid.
    pub unsafe fn new(obj: *mut Object) -> Self {
        let ptr = Box::new(UnsafeCell::new(ptr::null_mut()));
        runtime::objc_initWeak(ptr.get(), obj);
        WeakPtr(ptr)
    }

    /// Loads the object self points to, returning a `StrongPtr`.
    /// If the object has been deallocated, the returned pointer will be null.