53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
Rust
static HYDROGEN_BONDED: AtomicU32 = AtomicU32::new(0);
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static OXYGEN_BONDED: AtomicU32 = AtomicU32::new(0);
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static WATER_FORMED: AtomicU32 = AtomicU32::new(0);
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fn make_water() {
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WATER_FORMED.fetch_add(1, Ordering::Relaxed);
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}
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fn timeout() {
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rt::task::drop_privilege();
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rt::task::sleep(1000);
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let w = WATER_FORMED.load(Ordering::Relaxed);
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let h = HYDROGEN_BONDED.load(Ordering::Relaxed);
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let o = OXYGEN_BONDED.load(Ordering::Relaxed);
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/* The oxygen or hydrogen may not have bonded by the time rt::trap is called
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* after making a water molecule, so allow for o and h to be one molecule's
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* worth below expected value or exactly equal to it. */
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let o_lo = w - 1;
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let o_hi = w;
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let h_lo = (w - 1) * 2;
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let h_hi = w * 2;
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assert!(o >= o_lo, "not enough oxygen was bonded");
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assert!(o <= o_hi, "too much oxygen was bonded");
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assert!(h >= h_lo, "not enough hydrogen was bonded");
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assert!(h <= h_hi, "too much hydrogen was bonded");
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rt::trap();
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}
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fn oxygen_loop() {
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rt::task::drop_privilege();
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loop {
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oxygen();
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OXYGEN_BONDED.fetch_add(1, Ordering::Relaxed);
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}
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}
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fn hydrogen_loop() {
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rt::task::drop_privilege();
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loop {
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hydrogen();
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HYDROGEN_BONDED.fetch_add(1, Ordering::Relaxed);
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}
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}
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rt::task!(timeout, rt::task::STACK_MIN, 0);
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rt::task!(hydrogen_loop, rt::task::STACK_MIN, 2);
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rt::task!(hydrogen_loop, rt::task::STACK_MIN, 2);
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rt::task!(oxygen_loop, rt::task::STACK_MIN, 1);
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