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22 lines
538 B
Rust
22 lines
538 B
Rust
extern crate cortex_m_rtfm as rtfm;
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use rtfm::{C2, C4, P1, P3, Resource};
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static R1: Resource<i32, C2> = Resource::new(0);
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static R2: Resource<i32, C4> = Resource::new(0);
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fn j1(prio: P1) {
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R1.lock(&prio, |r1, _| {
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// Would preempt this critical section
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// rtfm::request(j2);
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});
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}
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fn j2(prio: P3) {
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R2.lock(&prio, |r2, c4| {
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// OK C2 (R1's ceiling) <= C4 (system ceiling)
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// BAD C2 (R1's ceiling) < P3 (j2's priority)
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let r1 = R1.borrow(&prio, &c4);
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//~^ error
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});
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}
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