Method pop

crates/virtual-machine/src/devices/keyboard.rs:65–67

Pop the oldest event, or the empty sentinel.

(&mut self)

    // Pop the oldest event, or the empty sentinel.
    fn pop(&mut self) -> u32 {
        self.queue.pop_front().unwrap_or(KBD_EMPTY)
    }

    fn read_reg(&mut self, offset: usize) -> u32 {
        match offset {
            KBD_STATUS_REG => self.queue.len() as u32,