Type Alias XactCallback 

pub type XactCallback = Option<unsafe extern "C-unwind" fn(event: Type, arg: *mut c_void)>;

Aliased Type

pub enum XactCallback {
    None,
    Some(unsafe extern "C-unwind" fn(u32, *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C-unwind" fn(u32, *mut c_void))

Some value of type T.