70 lines
1.4 KiB
Rust
70 lines
1.4 KiB
Rust
#![no_main]
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use core::sync::atomic::{AtomicI32, Ordering};
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const MAX_SEQ: i32 = 9;
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static SEQ: AtomicI32 = AtomicI32::new(0);
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rt::mutex!(MUTEX0);
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rt::mutex!(MUTEX1);
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rt::mutex!(MUTEX2);
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fn sequence(s: i32) {
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assert_eq!(s, SEQ.load(Ordering::Relaxed), "sequence out of order");
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if SEQ.fetch_add(1, Ordering::Relaxed) >= MAX_SEQ {
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rt::trap();
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}
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}
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fn locker0() {
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rt::task::drop_privilege();
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sequence(3);
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{
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let _guard0 = MUTEX0.lock();
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let _guard1 = MUTEX1.lock();
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sequence(5);
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}
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sequence(-1);
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}
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fn locker1() {
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rt::task::drop_privilege();
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sequence(2);
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let guard1 = MUTEX1.lock();
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rt::task::sleep(20);
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sequence(4);
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let _guard2 = MUTEX2.lock();
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drop(guard1);
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sequence(8);
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rt::task::sleep(20);
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sequence(-1);
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}
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fn spinner() {
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rt::task::drop_privilege();
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sequence(1);
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rt::task::sleep(10);
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loop {}
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}
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fn donator() {
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rt::task::drop_privilege();
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sequence(0);
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rt::task::sleep(30);
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{
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let _guard0 = MUTEX0.lock();
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sequence(6);
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}
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sequence(7);
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assert!(
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MUTEX2.timed_lock(10).is_none(),
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"donator timedlock succeeded"
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);
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sequence(9);
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}
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rt::task!(locker0, rt::task::STACK_MIN, 3);
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rt::task!(locker1, rt::task::STACK_MIN, 2);
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rt::task!(spinner, rt::task::STACK_MIN, 1);
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rt::task!(donator, rt::task::STACK_MIN, 0);
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