Struct IrqLine

pub struct IrqLine { /* private fields */ }

An Interrupt ReQuest (IRQ) line.

Users can use alloc or alloc_specific to allocate a (specific) IRQ line.

The IRQ number is guaranteed to be an external IRQ number and users can use on_active to safely register callback functions on this IRQ line. When the IRQ line is dropped, all the registered callbacks will be unregistered automatically.

Implementations

impl IrqLine

pub fn alloc() -> Result<Self>

Allocates an available IRQ line.

pub fn alloc_specific(irq_num: u8) -> Result<Self>

Allocates a specific IRQ line.

pub fn num(&self) -> u8

Gets the IRQ number.

pub fn on_active<F>(&mut self, callback: F)

where F: Fn(&TrapFrame) + Sync + Send + 'static,

Registers a callback that will be invoked when the IRQ is active.

For each IRQ line, multiple callbacks may be registered.

pub fn is_empty(&self) -> bool

Checks if there are no registered callbacks.

pub fn remapping_index(&self) -> Option<u16>

Gets the remapping index of the IRQ line.

This method will return None if interrupt remapping is disabled or not supported by the architecture.

Trait Implementations

impl Clone for IrqLine

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for IrqLine

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.