Struct kernel::Callback

pub struct Callback {
    app_id: AppId,
    appdata: usize,
    fn_ptr: NonNull<*mut ()>,
}

Type for calling a callback in a process.

This is essentially a wrapper around a function pointer.

Fields

app_id: AppId

appdata: usize

fn_ptr: NonNull<*mut ()>

Methods

impl Callback

pub(crate) fn new(     appid: AppId,     appdata: usize,     fn_ptr: NonNull<*mut ()> ) -> Callback

pub fn schedule(&mut self, r0: usize, r1: usize, r2: usize) -> bool

Actually trigger the callback.

This will queue the Callback for the associated process. It returns false if the queue for the process is full and the callback could not be scheduled.

The arguments (r0-r2) are the values passed back to the process and are specific to the individual Driver interfaces.

Trait Implementations

impl Copy for Callback

impl Clone for Callback

fn clone(&self) -> Callback

Returns a copy of the value.

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

Performs copy-assignment from source.