Type Alias PIO_COMPLETION_ROUTINE 

pub type PIO_COMPLETION_ROUTINE = Option<unsafe extern "system" fn() -> NTSTATUS>;

Aliased Type

pub enum PIO_COMPLETION_ROUTINE {
    None,
    Some(unsafe extern "system" fn() -> NTSTATUS),
}

Variants

None

No value.

Some(unsafe extern "system" fn() -> NTSTATUS)

Some value of type T.