Type Alias ASYNC_callback_fn

pub type ASYNC_callback_fn = Option<unsafe extern "C" fn(_: *mut c_void) -> i32>;

Aliased Type

enum ASYNC_callback_fn {
    None,
    Some(unsafe extern "C" fn(_: *mut c_void) -> i32),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: *mut c_void) -> i32)

Some value of type T.