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Unsafely turns an opaque C pointer into an unmanaged class reference.

This operation does not change reference counts.

let str: CFString = Unmanaged.fromOpaque(ptr).takeUnretainedValue()

value: An opaque C pointer. Returns: An unmanaged class reference to value.

Declaration

Creates an unmanaged reference with an unbalanced retain.

The instance passed as value will leak if nothing eventually balances the retain.

This is useful when passing an object to an API which Swift does not know the ownership rules for, but you know that the API expects you to pass the object at +1.

value: A class instance. Returns: An unmanaged reference to the object passed as value.

Declaration

Creates an unmanaged reference without performing an unbalanced retain.

This is useful when passing a reference to an API which Swift does not know the ownership rules for, but you know that the API expects you to pass the object at +0.

CFArraySetValueAtIndex(.passUnretained(array), i,
                       .passUnretained(object))

value: A class instance. Returns: An unmanaged reference to the object passed as value.

Declaration

Performs an unbalanced autorelease of the object.

Declaration

Performs an unbalanced release of the object.

Declaration

Performs an unbalanced retain of the object.

Declaration

Gets the value of this unmanaged reference as a managed reference and consumes an unbalanced retain of it.

This is useful when a function returns an unmanaged reference and you know that you're responsible for releasing the result.

Returns: The object referenced by this Unmanaged instance.

Declaration

Gets the value of this unmanaged reference as a managed reference without consuming an unbalanced retain of it.

This is useful when a function returns an unmanaged reference and you know that you're not responsible for releasing the result.

Returns: The object referenced by this Unmanaged instance.

Declaration

Unsafely converts an unmanaged class reference to a pointer.

This operation does not change reference counts.

let str0: CFString = "boxcar"
let bits = Unmanaged.passUnretained(str0)
let ptr = bits.toOpaque()

Returns: An opaque pointer to the value of this unmanaged reference.

Declaration