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extern crate cortex_m_rtfm as rtfm;
use rtfm::{C2, C4, P1, P3, Resource, T1, T3};
static R1: Resource<i32, C2> = Resource::new(0);
static R2: Resource<i32, C4> = Resource::new(0);
fn j1(prio: P1, thr: T1) {
thr.raise(
&R1, |thr| {
let r1 = R1.access(&prio, thr);
// `j2` preempts this critical section
rtfm::request(j2);
}
);
}
fn j2(_task: Task, prio: P3, thr: T3) {
thr.raise(
&R2, |thr| {
// OK C2 (R1's ceiling) <= T4 (preemption threshold)
// BAD C2 (R1's ceiling) < P3 (j2's priority)
let r1 = R1.access(&prio, thr);
//~^ error
}
);
}
// glue
extern crate cortex_m;
use cortex_m::ctxt::Context;
use cortex_m::interrupt::Nr;
struct Task;
unsafe impl Context for Task {}
unsafe impl Nr for Task {
fn nr(&self) -> u8 {
0
}
}
|
