Type Alias core_foundation_sys::messageport::CFMessagePortCallBack

pub type CFMessagePortCallBack = Option<unsafe extern "C" fn(local: CFMessagePortRef, msgid: i32, data: CFDataRef, info: *mut c_void) -> CFDataRef>;

Aliased Type

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

Variants

None

No value.

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

Some value of type T.