Type Alias CGDataProviderReleaseDataCallback 

pub type CGDataProviderReleaseDataCallback = Option<unsafe extern "C-unwind" fn(*mut c_void, NonNull<c_void>, usize)>;

Available on crate feature CGDataProvider only.

Apple’s documentation

Aliased Type

pub enum CGDataProviderReleaseDataCallback {
    None,
    Some(unsafe extern "C-unwind" fn(*mut c_void, NonNull<c_void>, usize)),
}

Variants

None

No value.

Some(unsafe extern "C-unwind" fn(*mut c_void, NonNull<c_void>, usize))

Some value of type T.