events: implement a first attempt at an eventing system

src/task.rs

@@ -1,7 +1,9 @@
 use core::fmt;
 
+use crate::events::{Event, EventBus};
+
 pub trait Task: Send {
-    fn tick(&mut self) {}
+    fn tick(&mut self, event: &Event, bus: &mut EventBus) {}
     fn start(&mut self) {}
     fn stop(&mut self) {}
     fn name(&self) -> &'static str {
@@ -55,7 +57,7 @@ impl ScheduledTask {
         }
     }
 
-    fn tick(&mut self) {
+    fn tick(&mut self, event: &Event, bus: &mut EventBus) {
         self.state = match self.state {
             ScheduledState::Start => {
                 log::info!("Starting task {}", self.task.name());
@@ -63,7 +65,7 @@ impl ScheduledTask {
                 ScheduledState::Running
             },
             ScheduledState::Running => {
-                self.task.tick();
+                self.task.tick(event, bus);
                 ScheduledState::Running
             },
             ScheduledState::Stop => {
@@ -96,10 +98,10 @@ impl<const TASK_COUNT: usize> FixedSizeScheduler<TASK_COUNT> {
 }
 
 impl<const TASK_COUNT: usize> Scheduler for FixedSizeScheduler<TASK_COUNT> {
-    fn tick(&mut self) {
+    fn tick(&mut self, event: &Event, bus: &mut EventBus) {
         for slot in &mut self.tasks {
             match slot {
-                Some(task) => task.tick(),
+                Some(task) => task.tick(event, bus),
                 _ => ()
             }
         }
@@ -107,5 +109,5 @@ impl<const TASK_COUNT: usize> Scheduler for FixedSizeScheduler<TASK_COUNT> {
 }
 
 pub trait Scheduler {
-    fn tick(&mut self);
+    fn tick(&mut self, event: &Event, bus: &mut EventBus);
 }