Type Alias gpio_irq_callback_t 

pub type gpio_irq_callback_t = Option<unsafe extern "C" fn(gpio: uint, events: u32)>;

Aliased Type

pub enum gpio_irq_callback_t {
    None,
    Some(unsafe extern "C" fn(u32, u32)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(u32, u32))

Some value of type T.